Definition of Managed Objects for the Neighborhood Discovery Protocol
draft-ietf-manet-nhdp-mib-12

Abstract

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects for configuring parameters of the Neighborhood Discovery Protocol (NHDP) process on a router. The MIB module defined in this memo, denoted NHDP-MIB, also reports state, performance information and notifications. This additional state and performance information is useful to troubleshoot problems and performance issues during neighbor discovery.

Status of this Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on September 25, 2012.

Copyright Notice

Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved.

This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.

Table of Contents

• 1. Introduction
• 2. The Internet-Standard Management Framework
• 3. Conventions
• 4. Overview
• 4.1. Terms
• 5. Structure of the MIB Module
• 5.1. Notifications
• 5.1.1. Introduction
• 5.1.2. Notification Generation
• 5.1.3. Limiting Frequency of Notifications
• 5.1.3.1. Ignoring Initial Activity
• 5.1.3.2. Throttling Traps
• 5.1.3.3. One Notification per Event
• 5.2. The Configuration Group
• 5.3. The State Group
• 5.4. The Performance Group
• 6. Relationship to Other MIB Modules
• 6.1. Relationship to the SNMPv2-MIB
• 6.2. Relationship to Routing Protocol MIB Modules Relying on the NHDP-MIB Module
• 6.3. MIB Modules Required for IMPORTS
• 7. Definitions
• 8. Security Considerations
• 9. IANA Considerations
• 10. Acknowledgements
• 11. References
• 11.1. Normative References
• 11.2. Informative References
• Appendix A.
• Authors' Addresses

1. Introduction

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects for configuring parameters of the Neighborhood Discovery Protocol [RFC6130] process on a router. The MIB module defined in this memo, denoted NHDP-MIB, also reports state, performance information and notifications. This additional state and performance information is useful to troubleshoot problems and performance issues during neighbor discovery.

2. The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to Section 7 of [RFC3410].

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB module are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in [RFC2578], [RFC2579] and [RFC2580].

3. Conventions

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and OPTIONAL" in this document are to be interpreted as described in [RFC2119].

4. Overview

[RFC6130] allows a router in a Mobile Ad Hoc Network (MANET) to discover and track topological information of routers up to two hops away by virtue of exchanging HELLO messages. This information is useful for routers running various routing and multicast flooding protocols developed within the IETF MANET Working Group.

4.1. Terms

The following definitions apply throughout this document:

• Notification Objects - triggers and associated notification messages allowing for asynchronous tracking of pre-defined events on the managed router.
• Configuration Objects - switches, tables, objects which are initialized to default settings or set through the management interface defined by this MIB module.
• State Objects - automatically generated values which define the current operating state of the NHDP protocol process in the router.
• Performance Objects - automatically generated values which help an administrator or automated tool to assess the performance of the NHDP protocol process on the router and the overall discovery performance within the MANET.

5. Structure of the MIB Module

This section presents the structure of the NHDP-MIB module. The MIB module is arranged into the following structure:

• nhdpNotifications - objects defining NHDP-MIB notifications.
• nhdpObjects - defining objects within this MIB module. The objects are arranged into the following groups:
  • Configuration Group - defining objects related to the configuration of the NHDP instance on the router.
  • State Group - defining objects which reflect the current state of the NHDP instance running on the router.
  • Performance Group - defining objects which are useful to a management station when characterizing the performance of NHDP on the router and in the MANET.
• nhdpConformance - defining the minimal and maximal conformance requirements for implementations of this MIB module.

5.1. Notifications

This section describes the use of notifications, and mechanisms to enhance the ability to manage NHDP networks.

5.1.1. Introduction

Notifications can be emitted by an NHDP router as a reaction to a specific event. This allows a network manager to efficiently determine the source of problems or significant changes of configuration or topology, instead of polling a possibly large number of NHDP routers.

5.1.2. Notification Generation

When an exception event occurs, the application notifies the local agent, which sends a notification to the appropriate SNMP management stations. The message includes the notification type and may include a list of notification-specific variables. Section 7 contains the notification definitions, which includes the variable lists. At least one IP address of the NHDP router that originates the notification is included in the variable list so that the network manager may determine the source of the notification.

5.1.3. Limiting Frequency of Notifications

To limit the frequency of notifications, the following additional mechanisms are suggested, similar to those in [RFC4750]:

5.1.3.1. Ignoring Initial Activity

The majority of critical events occur when NHDP is first enabled on a router, at which time the symmetric neighbors and two-hop neighbors of the NHDP router are discovered. During this initial period, a potential flood of notifications is unnecessary since the events are expected. To avoid unnecessary notifications, a router SHOULD NOT originate expected notifications until a certain time interval has elapsed, which is to be predefined by the network manager. It is RECOMMENDED that this time interval is at least 3 x HELLO_INTERVAL, so that symmetric neighbors are discovered.

5.1.3.2. Throttling Traps

The mechanism for throttling the notifications is the same as in [RFC4750] (i.e. the amount of transmitted notifications per time is bounded).

Appropriate values for the window time and upper bound are to be selected by the network manager and depend on the deployment of the MANET. If NHDP is deployed on a lossy, wireless medium, sending too many notifications in a short time interval may lead to collisions and dropped packets. In particular, in dense deployments of NHDP routers (i.e. where each router has many neighbors), a change of the local topology may trigger many notifications at the same time. [RFC4750] recommends "7 notifications with a window time of 10 seconds" as upper bound. As NHDP is expected to be deployed in more lossy channels than OSPF, it is RECOMMENDED to choose a lower threshold for the number of notifications per time than that.

5.1.3.3. One Notification per Event

Similar to the mechanism in [RFC4750], only one notification is sent per event.

5.2. The Configuration Group

The NHDP router is configured with a set of controls. The authoritative list of configuration controls within the NHDP-MIB module are found within the MIB module itself. Generally, an attempt was made in developing the NHDP-MIB module to support all configuration objects defined in [RFC6130]. For all of the configuration parameters, the same constraints and default values of these parameters as defined in [RFC6130] are followed. Refer to [RFC5148] for guidance on setting jitter related parameters, e.g., nhdpMaxJitter.

5.3. The State Group

The State Group reports current state information of a router running [RFC6130]. The NHDP-MIB State Group tables were designed to contain the complete set of state information defined within the information bases specified in Section 6, Section 7 and Section 8 of [RFC6130].

Two constructs, i.e., TEXTUAL CONVENTIONs, are defined to support of the tables in the State Group. The NHDP protocol stores and indexes information through sets of (dynamically defined) addresses, i.e., address sets. Within SMIv2 it is not possible to index tables with variably defined address sets. Hence, these TEXTUAL CONVENTIONS are defined to provide a local mapping between NHDP managed address sets and SMIv2 table indexing. These constructs are the NeighborIfIndex and NeighborRouterIndex. These are locally (to the NHDP router) defined, unique identifiers of virtual neighbors and neighbor interfaces. Due to the nature of the NHDP protocol, the local router may have identified distinct address sets but is not able to associate these as a single interface. Hence, two or more NeighborIfIndexes pointing to multiple distinct address sets may in fact be related to a common neighbor interface. This ambiguity may also hold with respect to the assignment of the NeighborRouterIndex. The local MIB agent is responsible for managing, aggregating and retiring the defined indexes, and in updating MIB tables using these indexes as the local router learns more about its neighbors' topology. These constructs are used to define indexes to the appropriate State Group tables and to correlate table entries to address sets, virtual neighbor interfaces and virtual neighbors within the MANET.

5.4. The Performance Group

The Performance Group reports values relevant to system performance. This section lists objects for NHDP performance monitoring, some of which are explicitly defined in the NHDP-MIB module and others which can be estimated through a combination of base objects from this MIB module. Throughout this section, those objects will be pointed out that are intended as base objects which are explicitly defined within this MIB module and those objects which can be estimated.

Unstable neighbors or 2-hop neighbors and frequent changes of sets can have a negative influence on the performance of NHDP. The following objects allow management applications to acquire information related to the stability and performance of NHDP:

The following objects return statistics related to HELLO messages:

• Total number of sent HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageXmits

  Object type: Counter32

• Total number of received HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageRecvd

  Object type: Counter32

• Total number of sent periodic HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessagePeriodicXmits

  Object type: Counter32

• Total number of sent triggered HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageTriggeredXmits

  Object type: Counter32

• Acquire history of HELLO message scheduling instances for a given time duration on an interface

  It is desirable to develop the history of the exact timestamps of each HELLO message that has been sent as well as the type of the message (triggered or periodical). The list of events starts at the given point of time t0 and ends at the given time t1.

  This is a Derived Object estimated from the NHDP-MIB module. It is derived from, e.g., the nhdpIfHelloMessagePeriodicXmits Base Object from the NHDP-MIB module.

• Histogram of the intervals between HELLO messages on an interface

  It is desirable to track the values (in a 2-dimensional array) that represent a histogram of intervals between HELLO messages. The histogram would display the distribution of intervals between two consecutive HELLOs using a given bin size. It includes all HELLOs that have been sent after the given time t0 and before the given time t1.

  This is a Derived Object to be estimated from objects within the NHDP-MIB module. It can be estimated from, e.g., the nhdpIfHelloMessagePeriodicXmits Base Object from the NHDP-MIB module. The network management application could convert this information into the desired histogram.

• Changes of the frequency of the message scheduling on an interface

  This object will divide the given time interval from t0 to t1 into a given number of equal parts. It then creates a histogram for each part and calculates the distances (e.g. using the Bhattacharyya distance) between each two adjacent histograms in time. A higher value between two histograms means more difference between the histograms. For instance, this is representative of an event that suddenly sends many triggered HELLO messages, whereas before there have been only very few such triggered messages.

  This is a Derived Object estimated from objects within the NHDP-MIB module, as previously discussed, albeit this is a bit more complex with respect to the management application.

• Average number of sent HELLO messages per second between the given time t0 and t1 on an interface

  This is a Derived Object estimated from, e.g., the nhdpIfHelloMessageXmits Base Object.

• Average number of received HELLO messages per second on an interface between the given time t0 and t1

  This is a Derived Object estimated from the NHDP-MIB module. See the previous discussion.

• Total accumulated size in octets of sent HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageXmitAccumulatedSize

  Object type: Counter64

• Total accumulated size in octets of received HELLO messages on an interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageRecvdAccumulatedSize

  Object type: Counter64

• Average size in octets of sent HELLO messages between the given time t0 and t1 on an interface

  This is a Derived Object estimated from, e.g., the nhdpIfHelloMessageRecvdAccumulatedSize Base Object from this NHDP-MIB module.

• Average size in octets of received HELLO messages between the given time t0 and t1 on an interface

  This is a Derived Object estimated from the NHDP-MIB module. See previous discussion.

• Total accumulated number of advertised symmetric neighbors in HELLOs on that interface.

  This is a Base Object.

  Object name: nhdpIfHelloMessageXmitAccumulatedSymmetricNeighborCount

  Object type: Counter32

• Total accumulated number of advertised heard neighbors in HELLOs on that interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageXmitAccumulatedHeardNeighborCount

  Object type: Counter32

• Total accumulated number of advertised lost neighbors in HELLOs on that interface

  This is a Base Object.

  Object name: nhdpIfHelloMessageXmitAccumulatedLostNeighborCount

  Object type: Counter32

• Number of expected packets from a given neighbor based on the packet sequence number on an interface

  This is a Base Object.

  Object name: nhdpDiscIfExpectedPackets

  Object type: Counter32

• Success rate of received packets (number of received packets divided by number of expected packets based on the packet sequence number)

  This is a Derived Object to be pulled from this NHDP-MIB module. It is derived from, e.g., the nhdpDiscIfRecvdPackets and the nhdpDiscIfExpectedPackets Base Objects defined in this MIB module. This metric is then computed by the network management application.

The following objects inspect the frequency of all Neighbor Set changes:

• Number of Neighbor Set changes

  This object counts each Neighbor Set change. A change occurs whenever a new Neighbor Tuple has been added, a Neighbor Tuple has been removed or any entry of a Neighbor Tuple has been modified.

  This is a Base Object.

  Object name: nhdpNibNeighborSetChanges

  Object type: Counter32

• Acquire history of Neighbor Set changes

  This object returns the history of the exact timestamps of each time the Neighbor Set has been changed.

  This is a Derived Object estimated from the NHDP-MIB module. It is derived from the previously discussed Base Object.

• Histogram of the intervals between Neighbor Set changes

  Returns the values (in a 2-dimensional array) that represent a histogram of intervals between Neighbor Set changes.

  This is a Derived Object estimated from the previously discussed Base Object.

• Changes of the frequency of the Neighbor Set changes

  This object will divide the given time interval from t0 to t1 into a given number of equal parts. It then creates a histogram for each part and calculates the distances (e.g. using the Bhattacharyya distance) between each two adjacent histograms in time. A higher value between two histograms means more difference between the histograms.

  This is a Derived Object estimated from the previously discussed Base Object.

The next objects examine the uptime of a given neighbor (as listed in the Neighbor Set):

• Number of changes of a Neighbor Tuple

  Returns the number of changes to the given Neighbor Tuple.

  This is a Base Object.

  Object name: nhdpDiscNeighborNibNeighborSetChanges

  Object type: Counter32

• Neighbor uptime

  Returns the number of hundredths of a second since the Neighbor Tuple corresponding to the given neighbor exists.

  This is a Base Object.

  Object name: nhdpDiscNeighborNibNeighborSetUpTime

  Object type: TimeStamp

• Acquire history of change of the 'nbrup' status of a given neighbor

  This object returns the history of the exact timestamps of each time the neighbor (as listed in the Neighbor Set) becomes 'nbrup' or 'nbrdown'. A neighbor is said to become 'nbrup' if a new Neighbor Tuple is created that corresponds to the given neighbor. It becomes 'nbrdown' if such a Neighbor Tuple has been deleted. The existence of a Lost Neighbor Tuple for that previous neighbor does not mean that the neighbor is still 'nbrup'.

  This is a Derived Object estimated from, e.g., the nhdpDiscNeighborNibNeighborSetChanges Base Object defined in this MIB module.

• Histogram of the intervals between a change of the 'nbrup' status of a given neighbor

  Returns the values that represent a histogram of intervals between a change of the 'nbrup' status of a given neighbor. The histogram includes all changes that have been made after the given time t0 and before the given time t1.

  This is a Derived Object estimated from, e.g. the nhdpDiscNeighborNibNeighborSetChanges Base Object defined in this MIB module. This object sits in the nhdpDiscNeighborSetPerfTable which is indexed by the nhdpDiscRouterIndex.

The following objects examine the stability of a neighbor. A neighbor is said to be unstable if it 'flaps' frequently between several links. It is said to be stable if the set of Link Tuples that correspond to the given neighbor is stationary.

• Count the changes of the interface(s) over which a given neighbor (as listed in the Neighbor Set) can be reached

  This object counts each time the neighbor changes the interface(s) over which it is reachable. A change in the set of Link Tuples corresponding to the appropriate Neighbor Tuple is registered, i.e. a corresponding Link Tuple is added or removed from the set of all corresponding Link Tuples.

  This is a Base Object.

  Object name: nhdpDiscNeighborNibNeighborSetReachableLinkChanges

  Object type: Counter32

• Acquire history of changes of the interface(s) over which a given neighbor can be reached

  This object returns the history of the exact timestamps of each time the neighbor changes the interface(s) over which it is reachable. That means that there is a change in the set of corresponding Link Tuples of for that Neighbor Tuple, i.e. a corresponding Link Tuple is added or removed from the set of all corresponding Link Tuples.

  This is a Derived Object estimated from, e.g., the nhdpDiscNeighborNibNeighborSetReachableLinkChanges Base Object.

• Histogram of the intervals between a change of the interface(s) over which a given neighbor is reachable

  Returns the values that represent a histogram of intervals between a change of the interface over which a given neighbor is reachable after the given time t0 and before the given time t1.

  This is a Derived Object estimated from the previously discussed Base Object, nhdpDiscNeighborNibNeighborSetChanges counter.

The following objects inspect the stability of a given 2-hop neighbor:

• Count the changes of the union of all N2_neighbor_iface_addr_list of 2-hop Tuples with an N2_2hop_addr equal to one of the given 2-hop neighbor's addresses

  This object returns the count of the times the 2-hop neighbor changes the neighbor(s) over which it is reachable.

  This is a Base Object.

  Object name: nhdpIib2HopSetPerfChanges

  Object type: Counter32

• Acquire history of changes of the N2_neighbor_iface_addr_list of a given 2-hop neighbor

  This object returns the history of the exact timestamps of each time the 2-hop neighbor changes the neighbor(s) over which it is reachable.

  This is a Derived Object estimated from the previously discussed Base Object, nhdpIib2HopSetPerfChanges counter.

• Histogram of the intervals between a change of a 2-hop neighbor's N2_neighbor_iface_addr_list

  Returns the values that represent a histogram of intervals between a change of the neighbor(s) over which the 2-hop neighbor is reachable after the given time t0 and before the given time t1.

  This is a Derived Object estimated from the previously discussed Base Object, nhdpIib2HopSetPerfChanges counter.

The next objects examine the uptime of a given 2-hop neighbor:

• 2-hop Neighbor uptime

  Returns the number of hundredths of a second since the any 2-Hop Tuple with a N2_2hop_addr of the given 2-hop neighbor IP address was registered.

  This is a Base Object.

  Object name: nhdpIib2HopSetPerfUpTime

  Object type: TimeStamp

• Acquire history of change of 'nbrup' status of a given 2-hop neighbor

  This object returns the history of the exact timestamps of each time the 2-hop neighbor becomes 'nbrup' or 'nbrdown'. A 2-hop neighbor becomes 'nbrup' when the first 2-hop Tuple with N2_2hop_addr of the given 2-hop neighbor is created. It becomes 'nbrdown' when the last 2-hop Tuple with N2_2hop_addr of the given 2-hop neighbor has been deleted.

  This is a Derived Object estimated from the previously discussed Base Object, nhdpIib2HopSetPerfChanges counter.

• Histogram of the intervals between a change of the 'nbrup' status of a given 2-hop neighbor

  Returns the values that represent a histogram of intervals between a change of the 'nbrup' status of a given 2-hop neighbor. The histogram includes all changes that have been made after the given time t0 and before the given time t1.

  This is a Derived Object estimated from the previously discussed Base Object, nhdpIib2HopSetPerfChanges counter.

6. Relationship to Other MIB Modules

This section specifies the relationship of the MIB module contained in this document to other standards, particularly to standards containing other MIB modules. Definitions imported from other MIB modules and other MIB modules that SHOULD be implemented in conjunction with the MIB module contained within this document are identified in this section.

6.1. Relationship to the SNMPv2-MIB

The 'system' group in the SNMPv2-MIB module [RFC3418] is defined as being mandatory for all systems, and the objects apply to the entity as a whole. The 'system' group provides identification of the management entity and certain other system-wide data. The NHDP-MIB module does not duplicate those objects.

6.2. Relationship to Routing Protocol MIB Modules Relying on the NHDP-MIB Module

[RFC6130] allows routing protocols to rely on the neighborhood information that is discovered by means of HELLO message exchange. In order to allow for troubleshooting, fault isolation, and management of such routing protocols through a routing protocol MIB module, it may be desired to align the State Group tables of the NHDP-MIB module and the routing protocol MIB module. This is accomplished through the definition of two TEXTUAL-CONVENTIONS in the NHDP-MIB module: the NeighborIfIndex and the NeighborRouterIndex. These object types are used to develop indexes into common NHDP-MIB module and routing protocol State Group tables. These objects are locally significant but should be locally common to the NHDP-MIB module and the routing protocol MIB module implemented on a common networked router. This will allow for improved cross referencing of information across the two MIB modules.

6.3. MIB Modules Required for IMPORTS

The following NHDP-MIB module IMPORTS objects from SNMPv2-SMI [RFC2578], SNMPv2-TC [RFC2579], SNMPv2-CONF [RFC2580], IF-MIB [RFC2863], INET-ADDRESS-MIB [RFC4001], and FLOAT-TC-MIB [RFC6340].

7. Definitions

This section contains the MIB module defined by the specification.

NHDP-MIB DEFINITIONS ::= BEGIN

-- This MIB module defines objects for the management of 
-- NHDP (RFC6130) - The Neighborhood Discovery Protocol, 
-- Clausen, T., Dearlove, C. and J. Dean, January 2011.

IMPORTS

    MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, 
    Counter32, Counter64, Integer32, Unsigned32, mib-2, 
                 TimeTicks
                 FROM SNMPv2-SMI  -- RFC2578

    TEXTUAL-CONVENTION, TruthValue, TimeStamp,
                 RowStatus 
                 FROM SNMPv2-TC  -- RFC2579

    MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
                 FROM SNMPv2-CONF  -- STD58

    InetAddressType, InetAddress,
    InetAddressPrefixLength             
                 FROM INET-ADDRESS-MIB  -- RFC4001 

    InterfaceIndex, InterfaceIndexOrZero
                 FROM IF-MIB  -- RFC2863

    Float32TC
                 FROM FLOAT-TC-MIB  -- RFC6340 
    ;

nhdpMIB MODULE-IDENTITY
       LAST-UPDATED "201203261000Z" -- March 26, 2012
       ORGANIZATION "IETF MANET Working Group"
       CONTACT-INFO
       "WG E-Mail: manet@ietf.org

        WG Chairs: sratliff@cisco.com
                   jmacker@nrl.navy.mil


        Editors:   Ulrich Herberg
                   Ecole Polytechnique
                   LIX
                   91128 Palaiseau Cedex
                   France
                   ulrich@herberg.name
                   http://www.herberg.name/

                   Robert G. Cole
                   US Army CERDEC
                   Space and Terrestrial Communications
                   6010 Frankford Street
                   Bldg 6010, Room 453H
                   Aberdeen Proving Ground, MD 21005
                   USA
                   +1 443 395-8744
                   robert.g.cole@us.army.mil
                   http://www.cs.jhu.edu/~rgcole/

                   Ian D Chakeres
                   CenGen
                   9250 Bendix Road North
                   Columbia, Maryland  21045
                   USA
                   ian.chakeres@gmail.com
                   http://www.ianchak.com/"

       DESCRIPTION
           "This NHDP-MIB module is applicable to routers 
            implementing the Neighborhood Discovery Protocol
            defined in RFC6130.

            Copyright (C) The IETF Trust (2012). This version
            of this MIB module is part of RFCXXXX; see the RFC
            itself for full legal notices."

       -- revision
       REVISION "201203261000Z" -- March 26, 2012
       DESCRIPTION
            "The first version of this MIB module,
             published as RFCXXXX.
            "
       -- RFC-Editor assigns XXXX
       ::= { mib-2 998 }   -- to be assigned by IANA

--
-- Top-Level Components of this MIB Module
--
nhdpNotifications OBJECT IDENTIFIER ::= { nhdpMIB 0 }
nhdpObjects       OBJECT IDENTIFIER ::= { nhdpMIB 1 }
nhdpConformance   OBJECT IDENTIFIER ::= { nhdpMIB 2 }


--
-- Textual Conventions
--
   -- Two new Textual Conventions have been defined in 
   -- this MIB module for indexing into the following
   -- tables and indexing into other tables in other MIB modules.
   -- This was necessary because the NHDP protocol manages and
   -- indexes based upon dynamic address tuples, i.e.,
   -- address sets, while SMI requires statically
   -- defined indexes for accessing its table rows.
   -- The NeighborIfIndex defines a unique (to the local router)
   -- index referencing a discovered virtual interface on another
   -- neighbor within the MANET. The NeighborRouterIndex defines a
   -- unique (to the local router) index referencing a discovered
   -- virtual neighbor within the MANET.  
   --
   -- Due to the nature of the NHDP protocol,
   -- different indexes may be related to common neighbor
   -- interfaces or common neighbor routers, but the information 
   -- obtained through NHDP has not allowed the local router
   -- to relate these virtual objects (i.e., interfaces or routers)
   -- at this point in time.  As more topology information
   -- is gathered by the local router, it may associate
   -- virtual interfaces or routers and collapse these
   -- indexes appropriately.

   -- Multiple addresses can be associated with a
   -- given NeighborIfIndex.  Each NeighborIfIndex is
   -- associated with a NeighborRouterIndex.  Throughout
   -- the nhdpStateObjGroup, the
   -- NeighborIfIndex and the NeighborRouterIndex are used
   -- to define the set of IpAddrs related to a virtual 
   -- neighbor interface or virtual neighbor under discussion.


NeighborIfIndex ::= TEXTUAL-CONVENTION
    DISPLAY-HINT "d"
    STATUS       current
    DESCRIPTION
        "An arbitrary, locally unique identifier associated with a
        virtual interface of a discovered NHDP neighbor.
        Due to the nature of the NHDP protocol, the local router 
        may not know if two distinct addresses belong to the 
        same interface of a neighbor or to two different 
        interfaces.  As the local router gains more
        knowledge of its neighbors, its local view may change and 
        this table will be updated to reflect the local router's current
        understanding associating address sets to neighbor interfaces.
        The local router identifies virtual neighbor interface through 
        the receipt of address lists advertised through an 
        NHDP HELLO message.  
        
        All objects of type NeighborIfIndex are assigned by the agent
        out of a common number space.

        The value for each discovered virtual neighbor 
        interface may not remain constant from 
        one re-initialization of the entity's network management 
        agent to the next re-initialization.  If the
        local router gains information associating two virtual
        interfaces on a neighbor as a common interface, 
        then the agent must aggregate the two address sets to 
        a single index chosen from the set of aggregated indexes, 
        it must update all tables in this 
        MIB module which are indexed by indexes
        of type NeighborIfIndex.  It can then reuse freed 
        index values following the next agent restart.

        The specific value is meaningful only within a given SNMP
        entity."
    SYNTAX       Unsigned32 (1..2147483647)


NeighborRouterIndex ::= TEXTUAL-CONVENTION
    DISPLAY-HINT "d"
    STATUS       current
    DESCRIPTION
        "An arbitrary, locally unique identifier associated with a
        virtual discovered neighbor (one or two hop).  Due to the 
        nature of the NHDP protocol, the local router may identify 
        multiple virtual neighbors  which in fact are one and 
        the same.  Two hop neighbors with more than one advertised 
        address will exhibit this behavior.  As the
        local router's knowledge of its neighbors' topology
        increases, the local router will be able to associate
        multiple virtual neighbor indexes into a single virtual
        neighbor index chosen from the set of aggregated indexes,
        it must update all tables in this MIB module indexed by these
        indexes, and it can reuse the freed indexes following the
        next agent re-initialization.

        All objects of type NeighborRouterIndex are assigned by
        the agent out of a common number space.

        The NeighborRouterIndex defines a discovered NHDP peer
        virtual neighbor of the local router.
        The value for each discovered virtual neighbor index must remain
        constant at least from one re-initialization of the entity's
        network management agent to the next re-initialization, except
        that if an application is deleted and re-created.

        The specific value is meaningful only within a given SNMP
        entity. An NeighborRouterIndex value must not be re-used 
        until the next agent restart."
    SYNTAX       Unsigned32 (1..2147483647)



--
-- nhdpObjects
--

--    1) Configuration Objects Group
--    2) State Objects Group
--    3) Performance Objects Group


--
-- nhdpConfigurationObjGrp
--

-- Contains the NHDP objects which configure specific options
-- which determine the overall performance and operation of the
-- discovery protocol.


nhdpConfigurationObjGrp OBJECT IDENTIFIER ::= { nhdpObjects 1 }


   nhdpInterfaceTable  OBJECT-TYPE
      SYNTAX      SEQUENCE OF NhdpInterfaceEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "nhdpInterfaceTable describes the
          configuration of the interfaces of this NHDP router.
          The ifIndex is from the interfaces group 
          defined in the Interfaces Group MIB. If the 
          corresponding entry with ifIndex value is deleted 
          from the Interface Table, then the entry in 
          this table is automatically deleted.

          The objects in this table are persistent and when 
          written the entity SHOULD save the change to 
          non-volatile storage."
      REFERENCE
         "RFC2863 - The Interfaces Group MIB, McCloghrie,
          K., and F. Kastenholtz, June 2000."
   ::= { nhdpConfigurationObjGrp 1 }

   nhdpInterfaceEntry OBJECT-TYPE
      SYNTAX      NhdpInterfaceEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "nhdpInterfaceEntry describes one NHDP
          local interface configuration as indexed by 
          its ifIndex as defined in the Standard MIB II
          Interface Table (RFC2863)."
      INDEX { nhdpIfIndex }
   ::= { nhdpInterfaceTable 1 }

   NhdpInterfaceEntry ::=
      SEQUENCE {
         nhdpIfIndex
            InterfaceIndex,
         nhdpIfStatus
            TruthValue,
         nhdpHelloInterval
            Unsigned32,
         nhdpHelloMinInterval
            Unsigned32,
         nhdpRefreshInterval
            Unsigned32,
         nhdpLHoldTime
            Unsigned32,
         nhdpHHoldTime
            Unsigned32,
         nhdpHystAcceptQuality
            Float32TC,
         nhdpHystRejectQuality
            Float32TC,
         nhdpInitialQuality
            Float32TC,
         nhdpInitialPending
            TruthValue,
         nhdpHpMaxJitter
            Unsigned32,
         nhdpHtMaxJitter
            Unsigned32,
         nhdpIfRowStatus
            RowStatus
         }

   nhdpIfIndex  OBJECT-TYPE
      SYNTAX      InterfaceIndex
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The ifIndex for this interface."
      ::= { nhdpInterfaceEntry 1 }
      
   nhdpIfStatus  OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhpdIfStatus indicates whether this interface is
          a MANET interface. A value of true(1) indicates 
          that the interface is a MANET interface.  A value of 
          false(2) indicates that the interface is not a MANET
          interface. This corresponds to the I_manet parameter
          in the Local Interface Set.
         "
      DEFVAL { false }
   ::= { nhdpInterfaceEntry 2 }


   --
   -- Interface Parameters - Message Intervals
   --

   nhdpHelloInterval  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhpdHelloInterval corresponds to 
          HELLO_INTERVAL of NHDP.

          The following constraint applies to this 
          parameter: 
             nhpdHelloInterval >= nhdpHelloMinInterval" 
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 2000 }
   ::= { nhdpInterfaceEntry 3 }


   nhdpHelloMinInterval  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhpdHelloMinInterval corresponds to 
         HELLO_MIN_INTERVAL of NHDP." 
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 500 }
   ::= { nhdpInterfaceEntry 4 }


   nhdpRefreshInterval  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhpdRefreshInterval corresponds to 
         REFRESH_INTERVAL of NHDP.

         The following constraint applies to this 
         parameter:
             nhdpRefreshInterval >= nhdpHelloInterval" 
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 2000 }
   ::= { nhdpInterfaceEntry 5 }

   --
   -- Interface Parameters - Information Validity times
   --

   nhdpLHoldTime  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpLHoldTime corresponds to 
         L_HOLD_TIME of NHDP."
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 6000 }
   ::= { nhdpInterfaceEntry 6 }

   nhdpHHoldTime  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpHHoldTime corresponds to 
         H_HOLD_TIME of NHDP.
         
         This object is persistent and when written
         the entity SHOULD save the change to 
         non-volatile storage."
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 6000 }
   ::= { nhdpInterfaceEntry 7 }

   --
   -- Interface Parameters - Link Quality 
   -- (is optional and settings define operation)
   --

   nhdpHystAcceptQuality  OBJECT-TYPE
      SYNTAX      Float32TC
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpHystAcceptQuality corresponds to 
         HYST_ACCEPT of NHDP.

          The following constraint applies to this 
          parameter:
              0 <= nhdpHystRejectQuality 
                <= nhdpHystAcceptQuality <= 1.0"
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      -- DEFVAL { 1.0 }
   ::= { nhdpInterfaceEntry 8 }

   nhdpHystRejectQuality  OBJECT-TYPE
      SYNTAX      Float32TC
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpHystRejectQuality corresponds to 
         HYST_REJECT of NHDP.

          The following constraint applies to this 
          parameter:
              0 <= nhdpHystRejectQuality 
                <= nhdpHystAcceptQuality <= 1.0"
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      -- DEFVAL { 0.0 }
   ::= { nhdpInterfaceEntry 9 }

   nhdpInitialQuality  OBJECT-TYPE
      SYNTAX      Float32TC
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpInitialQuality corresponds to 
         INITIAL_QUALITY of NHDP.

          The following constraint applies to this 
          parameter:
              0 <= nhdpInitialQuality <= 1.0"
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      -- DEFVAL { 1.0 }
   ::= { nhdpInterfaceEntry 10 }



   nhdpInitialPending  OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpInitialPending corresponds to 
         INITIAL_PENDING of NHDP.

         The following constraints apply to this parameter:

         If INITIAL_QUALITY >= HYST_ACCEPT, 
         then INITIAL_PENDING := false.

         If INITIAL_QUALITY < HYST_REJECT, 
         then INITIAL_PENDING := true."
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
   ::= { nhdpInterfaceEntry 11 }

   --
   -- Interface Parameters - Jitter
   --
   nhdpHpMaxJitter  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpHpMaxJitter corresponds to 
         HP_MAXJITTER of NHDP.

         For constraints on this object, refer
         to Section 5.4 of RFC5148."
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 500 }
   ::= { nhdpInterfaceEntry 12 }


   nhdpHtMaxJitter  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "nhdpHtMaxJitter corresponds to 
         HT_MAXJITTER of NHDP."
      REFERENCE
         "Section 5 on Protocol Parameters and 
          Constraints of RFC6130."
      DEFVAL { 500 }
   ::= { nhdpInterfaceEntry 13 }
   
   nhdpIfRowStatus  OBJECT-TYPE
      SYNTAX      RowStatus
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object permits management of the table 
         by facilitating actions such as row creation,
         construction, and destruction. The value of
         this object has no effect on whether other
         objects in this conceptual row can be
         modified.

         An entry may not exist in the active state unless all
         objects in the entry have an appropriate value.

         If this object is not equal to active(1), all associated
         entries in the nhdpLibLocalIfSetTable, nhdpInterfaceStateTable,
         nhdpIibLinkSetTable and the nhdpInterfacePerfTable shall be
         deleted."
      REFERENCE
         "RFC6130."
   ::= { nhdpInterfaceEntry 14 }


   --
   -- Router Parameters - Information Validity Time
   --
   nhdpNHoldTime  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
         "nhdpNHoldTime corresponds to 
         N_HOLD_TIME of NHDP.

          This object is persistent and when written
          the entity SHOULD save the change to 
          non-volatile storage."
      REFERENCE
         "RFC6130. 
          Section 5 on Protocol Parameters and 
          Constraints."
      DEFVAL { 6000 }
   ::= { nhdpConfigurationObjGrp 2 }


   nhdpIHoldTime  OBJECT-TYPE
      SYNTAX      Unsigned32
      UNITS       "milliseconds"
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
         "nhdpIHoldTime corresponds to 
         I_HOLD_TIME of NHDP.  

          This object is persistent and when written
          the entity SHOULD save the change to 
          non-volatile storage."
      REFERENCE
         "RFC6130. 
          Section 5 on Protocol Parameters and 
          Constraints."
      DEFVAL { 6000 }
   ::= { nhdpConfigurationObjGrp 3 }


    -- An NHDP router's Local Information Base (LIB)

    -- Local Interface Set Table
    -- Entry (foreach local interface): (IfNetAddrs, Is_manet)

    nhdpLibLocalIfSetTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpLibLocalIfSetEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A router's Local Interface Set records all 
           network addresses which are defined as local 
           interface network addresses.  The local interface
           is defined by the nhdpIfIndex.

           The Local Interface Set consists of Local Interface 
           Address Tuples per network interface and their prefix 
           lengths (in order to determine the network addresses 
           related to the interface) and an indication of whether 
           the interface is a MANET interface or not.

           Further guidance on the addition or removal of
           local addresses and network addresses is found
           in Section 9 of RFC6130."
       REFERENCE
          "RFC6130."
    ::= { nhdpConfigurationObjGrp 4 }

    nhdpLibLocalIfSetEntry  OBJECT-TYPE
       SYNTAX      NhdpLibLocalIfSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "A router's Local Interface Set consists
           of Configured Interface Address Tuples for each network
           interface, and an indication of whether the interface
           is a MANET interface or not.
           
           (IR_local_iface_addr, IR_time)
          "
       REFERENCE
          "RFC6130."
       INDEX { nhdpIfIndex }
    ::= { nhdpLibLocalIfSetTable 1 }

    NhdpLibLocalIfSetEntry ::=
       SEQUENCE {
          nhdpLibLocalIfSetIpAddrType
            InetAddressType,
          nhdpLibLocalIfSetIpAddr
            InetAddress,
          nhdpLibLocalIfSetIpAddrPrefixLen
            InetAddressPrefixLength,
          nhdpLibLocalIfSetIsManet
            TruthValue
         }

   nhdpLibLocalIfSetIpAddrType  OBJECT-TYPE
      SYNTAX      InetAddressType
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
         "The type of the nhdpLibLocalIfSetIpAddr
          in the InetAddress MIB (RFC4001).
          
          Only the values ipv4(1) and
          ipv6(2) are supported."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibLocalIfSetEntry 1 }

   nhdpLibLocalIfSetIpAddr  OBJECT-TYPE
      SYNTAX      InetAddress
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
         "nhdpLibLocalIfSetIpAddr is an
          address of an interface of
          this router.
        
          This object is interpreted according to
          the setting of nhdpLibLocalIfSetIpAddrType."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibLocalIfSetEntry 2 }

   nhdpLibLocalIfSetIpAddrPrefixLen  OBJECT-TYPE
      SYNTAX      InetAddressPrefixLength
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
         "Indicates the number of leading one bits that 
          form the mask.  The mask is logically-ANDed 
          to the nhdpLibLocalIfSetIpAddr to determine 
          the address prefix.  A row match is true
          if the address used as an index falls within
          the network address range defined by the
          address prefix."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibLocalIfSetEntry 3 }

     nhdpLibLocalIfSetIsManet  OBJECT-TYPE
        SYNTAX      TruthValue
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "Specifies whether this interface is
            a MANET interface or not."
        REFERENCE
           "RFC6130."
     ::= { nhdpLibLocalIfSetEntry 4 }



    -- Removed Interface Addr Set Table
    -- Entry (foreach removed network addr): (IfAddrRemoved, 
    --                                        ExpirationTime)

    nhdpLibRemovedIfAddrSetTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpLibRemovedIfAddrSetEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A router's Removed Interface Address Set records 
          network addresses which were recently used as local 
          interface network addresses.  If a router's interface 
          network addresses are immutable then the Removed
          Interface Address Set is always empty and MAY be omitted.
          It consists of Removed Interface Address Tuples, one 
          per network address."
       REFERENCE
          "RFC6130."
    ::= { nhdpConfigurationObjGrp 5 }

    nhdpLibRemovedIfAddrSetEntry  OBJECT-TYPE
       SYNTAX      NhdpLibRemovedIfAddrSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "A router's Removed Interface Address Set consists
          of Removed Interface Address Tuples, one per network
          address:
          
          (IR_local_iface_addr, IR_time)

          The association between these addrs and
          the router's Interface is found in the
          Standard MIB II's IP address table 
          (RFC1213)."
       REFERENCE
          "RFC6130."
       INDEX { nhdpLibRemovedIfAddrSetIpAddrType,
               nhdpLibRemovedIfAddrSetIpAddr }
    ::= { nhdpLibRemovedIfAddrSetTable 1 }

    NhdpLibRemovedIfAddrSetEntry ::=
       SEQUENCE {
          nhdpLibRemovedIfAddrSetIpAddrType
            InetAddressType,
          nhdpLibRemovedIfAddrSetIpAddr
            InetAddress,
          nhdpLibRemovedIfAddrSetIpAddrPrefixLen
            InetAddressPrefixLength,
          nhdpLibRemovedIfAddrSetIfIndex
            InterfaceIndexOrZero,
          nhdpLibRemovedIfAddrSetIRTime
            TimeStamp
         }

   nhdpLibRemovedIfAddrSetIpAddrType  OBJECT-TYPE
      SYNTAX      InetAddressType
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The type of the nhdpLibRemovedIfAddrSetIpAddr
          in the InetAddress MIB (RFC4001).

          Only the values ipv4(1) and
          ipv6(2) are supported."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibRemovedIfAddrSetEntry 1 }

   nhdpLibRemovedIfAddrSetIpAddr  OBJECT-TYPE
      SYNTAX      InetAddress
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpLibRemovedIfAddrSetIpAddr is a
          recently used address of an interface of
          this router."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibRemovedIfAddrSetEntry 2 }

   nhdpLibRemovedIfAddrSetIpAddrPrefixLen  OBJECT-TYPE
      SYNTAX      InetAddressPrefixLength
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "Indicates the number of leading one bits that 
          form the mask.  The mask is logically-ANDed 
          to the nhdpLibRemovedIfAddrSetIpAddr to determine 
          the address prefix.  A row match is true
          if the address used as an index falls within
          the network address range defined by the
          address prefix."
      REFERENCE
         "RFC6130."
   ::= { nhdpLibRemovedIfAddrSetEntry 3 }


     nhdpLibRemovedIfAddrSetIfIndex  OBJECT-TYPE
        SYNTAX      InterfaceIndexOrZero
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "Specifies the local IfIndex from which this
            IP address was recently removed."
        REFERENCE
           "RFC6130."
     ::= { nhdpLibRemovedIfAddrSetEntry 4 }

     nhdpLibRemovedIfAddrSetIRTime  OBJECT-TYPE
        SYNTAX      TimeStamp
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "nhdpLibRemovedIfAddrSetIRTime specifies the sysUptime 
          when to expire this entry and remove it from the
          'nhdpNibLostNeighborSetTable'"
        REFERENCE
           "RFC6130."
     ::= { nhdpLibRemovedIfAddrSetEntry 5 }




--
-- nhdpStateObjGrp
--

-- Contains information describing the current state of the NHDP
-- process on this device.

nhdpStateObjGrp    OBJECT IDENTIFIER ::= { nhdpObjects 2 }


   nhdpUpTime OBJECT-TYPE
       SYNTAX TimeStamp
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
             "The value of sysUpTime at the time current NHDP 
              process was initialized.
             "
    ::= { nhdpStateObjGrp 1 }


   nhdpInterfaceStateTable  OBJECT-TYPE
      SYNTAX      SEQUENCE OF NhdpInterfaceStateEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "nhdpInterfaceStateTable lists state information
          related to specific interfaces of this NHDP router.
          The value of ndhpIfIndex is an ifIndex from the
          interfaces group defined in the Interfaces Group
          MIB.

          The objects in this table are persistent and when 
          written the entity SHOULD save the change to 
          non-volatile storage."
      REFERENCE
         "RFC 2863 - The Interfaces Group MIB, McCloghrie,
          K., and F. Kastenholtz, June 2000."
   ::= { nhdpStateObjGrp 2 }

   nhdpInterfaceStateEntry OBJECT-TYPE
      SYNTAX      NhdpInterfaceStateEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "nhdpInterfaceStateEntry describes one NHDP
          local interface state as indexed by 
          its ndhpIfIndex."
      INDEX { nhdpIfIndex }
   ::= { nhdpInterfaceStateTable 1 }

   NhdpInterfaceStateEntry ::=
      SEQUENCE {
         nhdpIfStateUpTime
            TimeStamp
         }

   nhdpIfStateUpTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
             "The value of the sysUpTime when this
              interface was last initialized as a
              MANET interface."
   ::= { nhdpInterfaceStateEntry 1 }


   --
   -- Interface Parameters - Message Intervals
   --

   nhdpDiscIfSetTable OBJECT-TYPE
      SYNTAX       SEQUENCE OF NhdpDiscIfSetEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
           "A router's set of discovered interfaces on
            neighboring routers."
       REFERENCE
          "RFC6130."
    ::= { nhdpStateObjGrp 3 }


    nhdpDiscIfSetEntry  OBJECT-TYPE
       SYNTAX      NhdpDiscIfSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "The entries include the nhdpDiscRouterIndex of
           the discovered router, the nhdpDiscIfIndex
           of the discovered interface and the
           current set of addresses associated
           with this neighbor interface.  The
           nhdpDiscIfIndex uniquely identifies
           the remote interface address sets
           through this table.  It does not need
           to be unique across the MANET, but must
           be locally unique within this router."
       REFERENCE
          "RFC6130."
       INDEX { nhdpDiscIfSetIndex }
    ::= { nhdpDiscIfSetTable 1 }

    NhdpDiscIfSetEntry ::=
       SEQUENCE {
          nhdpDiscIfSetIndex
            Integer32,
          nhdpDiscIfIndex
            NeighborIfIndex,
          nhdpDiscRouterIndex
            NeighborRouterIndex,
          nhdpDiscIfSetIpAddrType
            InetAddressType,
          nhdpDiscIfSetIpAddr
            InetAddress,
          nhdpDiscIfSetIpAddrPrefixLen
            InetAddressPrefixLength
         }

   nhdpDiscIfSetIndex  OBJECT-TYPE
      SYNTAX      Integer32 (0..65535)
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "The index for this table.  Necessary
          because multiple addresses may be associated
          with a given nhdpDiscIfIndex." 
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 1 }

   nhdpDiscIfIndex  OBJECT-TYPE
      SYNTAX      NeighborIfIndex
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The NHDP interface index (locally created)
          of a neighbor's interface.  Used for cross
          indexing into other NHDP tables and other
          MIB modules."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 2 }

   nhdpDiscRouterIndex  OBJECT-TYPE
      SYNTAX      NeighborRouterIndex
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The NHDP neighbor index (locally created)
          of a neighboring router.  Used for cross
          indexing into other NHDP tables and other
          MIB modules."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 3 }

   nhdpDiscIfSetIpAddrType  OBJECT-TYPE
      SYNTAX      InetAddressType
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The type of the nhdpDiscIfSetIpAddr
          in the InetAddress MIB (RFC4001).

          Only the values ipv4(1) and
          ipv6(2) are supported."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 4 }

   nhdpDiscIfSetIpAddr  OBJECT-TYPE
      SYNTAX      InetAddress
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The nhdpDiscIfSetIpAddr is a
          recently used address of a neighbor
          of this router."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 5 }

   nhdpDiscIfSetIpAddrPrefixLen  OBJECT-TYPE
      SYNTAX      InetAddressPrefixLength
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "Indicates the number of leading one bits that 
          form the mask.  The mask is logically-ANDed 
          to the nhdpDiscIfSetIpAddr to determine 
          the address prefix.  A row match is true
          if the address used as an index falls within
          the network address range defined by the
          address prefix."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetEntry 6 }


   -- Interface Information Base (IIB)

   --
   -- NHDP Interface Information Base (IIB)
   --

   --     IIB Link Set
   --         Entry (foreach discovered link to a
   --                        1-H neighbor): (NeighborIfAddrList,
   --                                        HeardTime,
   --                                        SymTime,
   --                                        Quality,
   --                                        Pending,
   --                                        Lost,
   --                                        ExpireTime)

   nhdpIibLinkSetTable OBJECT-TYPE
      SYNTAX       SEQUENCE OF NhdpIibLinkSetEntry
      MAX-ACCESS   not-accessible
      STATUS       current
      DESCRIPTION
          "A Link Set of an interface records all links 
           from other routers which are, or recently 
           were, 1-hop neighbors."
      REFERENCE
         "RFC6130."
   ::= { nhdpStateObjGrp 4 }

    nhdpIibLinkSetEntry  OBJECT-TYPE
       SYNTAX      NhdpIibLinkSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "A Link Set consists of Link Tuples, each 
           representing a single link indexed by the
           local and remote interface pair:

           (L_neighbor_iface_addr_list, L_HEARD_time,
            L_SYM_time, L_quality, L_pending, 
            L_lost, L_time). 
            
            Note that L_quality is not included in the
            entries below, because updates may be
            required too frequently."
       REFERENCE
          "RFC6130."
       INDEX { nhdpIfIndex,
               nhdpDiscIfIndex }
    ::= { nhdpIibLinkSetTable 1 }

    NhdpIibLinkSetEntry ::=
       SEQUENCE {
          nhdpIibLinkSetLHeardTime
            TimeStamp,
          nhdpIibLinkSetLSymTime
            TimeStamp,
          nhdpIibLinkSetLPending
            TruthValue,
          nhdpIibLinkSetLLost
            TruthValue,
          nhdpIibLinkSetLTime
            TimeStamp
         }

   nhdpIibLinkSetLHeardTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIibLinkSetLHeardTime corresponds
         to L_HEARD_time of NHDP."
      REFERENCE
         "RFC6130."
   ::= { nhdpIibLinkSetEntry 1 }

   nhdpIibLinkSetLSymTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIibLinkSetLSymTime corresponds
         to L_SYM_time of NHDP."
      REFERENCE
         "RFC6130."
   ::= { nhdpIibLinkSetEntry 2 }

   nhdpIibLinkSetLPending  OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIibLinkSetLPending corresponds
         to L_pending of NHDP"
      REFERENCE
         "RFC6130."
   ::= { nhdpIibLinkSetEntry 3 }

   nhdpIibLinkSetLLost  OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIibLinkSetLLost corresponds
         to L_lost of NHDP"
      REFERENCE
         "RFC6130."
   ::= { nhdpIibLinkSetEntry 4 }

   nhdpIibLinkSetLTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIibLinkSetLTime specifies the sysUptime 
          when to expire this entry and remove it from the
          'nhdpIibLinkSetTable'.
         "
      REFERENCE
         "RFC6130."
   ::= { nhdpIibLinkSetEntry 5 }


  --
  --     IIB 2-Hop Set 
  --         Entry (foreach discovered 2-H neighbor
  --                network address): (1HopNeighIfAddrList,
  --                                   2HopNeighNetworkAddr,
  --                                   ExpireTime)
  --
    nhdpIib2HopSetTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpIib2HopSetEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
           "A 2-Hop Set of an interface records network 
           addresses of symmetric 2-hop neighbors, and 
           the symmetric links to symmetric 1-hop neighbors
           through which these symmetric 2-hop neighbors
           can be reached.  It consists of 2-Hop Tuples, 
           each representing a single network address of 
           a symmetric 2-hop neighbor, and a single MANET 
           interface of a symmetric 1-hop neighbor.

           (N2_neighbor_iface_addr_list, 
            N2_2hop_addr, N2_time)."
       REFERENCE
          "RFC6130."
    ::= { nhdpStateObjGrp 5 }

    nhdpIib2HopSetEntry  OBJECT-TYPE
       SYNTAX      NhdpIib2HopSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "The entries include the 2-hop neighbor addresses,
           which act as the table index, and associated
           1-hop symmetric link address set, designated 
           through nhdpDiscIfIndex, and an expiration time.
           The nhdpIfIndex in the INDEX is 
           interface index of the local interface
           through which these 2-hop addresses are
           accessible."
       REFERENCE
          "RFC6130."
       INDEX { nhdpIfIndex,
               nhdpIib2HopSetIpAddressType,
               nhdpIib2HopSetIpAddress }
    ::= { nhdpIib2HopSetTable 1 }

    NhdpIib2HopSetEntry ::=
       SEQUENCE {
          nhdpIib2HopSetIpAddressType
            InetAddressType,
          nhdpIib2HopSetIpAddress
            InetAddress,
          nhdpIib2HopSetIpAddrPrefixLen
            InetAddressPrefixLength,
          nhdpIib2HopSet1HopIfIndex
            NeighborIfIndex,
          nhdpIib2HopSetN2Time
            TimeStamp
         }

   nhdpIib2HopSetIpAddressType  OBJECT-TYPE
      SYNTAX      InetAddressType
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "The type of the nhdpIib2HopSetIpAddress
          in the InetAddress MIB module (RFC4001).

          Only the values ipv4(1) and
          ipv6(2) are supported."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetEntry 1 }

   nhdpIib2HopSetIpAddress  OBJECT-TYPE
      SYNTAX      InetAddress
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "nhdpIib2HopSetIpAddr corresponds
         to N2_2hop_addr of NHDP."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetEntry 2 }

   nhdpIib2HopSetIpAddrPrefixLen  OBJECT-TYPE
      SYNTAX      InetAddressPrefixLength
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "Indicates the number of leading one bits that 
          form the mask.  The mask is logically-ANDed 
          to the nhdpIib2HopSetIpAddress to determine 
          the address prefix.  A row match is true
          if the address used as an index falls within
          the network address range defined by the
          address prefix."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetEntry 3 }

   nhdpIib2HopSet1HopIfIndex  OBJECT-TYPE
      SYNTAX      NeighborIfIndex
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIib2HopSet1HopIfIndex is 
          nhdpDiscIfIndex of the 1-hop
          neighbor which communicated the ipAddress
          of the 2-hop neighbor in this row entry."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetEntry 4 }

   nhdpIib2HopSetN2Time  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpIib2HopSetN2Time specifies the sysUptime 
          when to expire this entry and remove it from the
          'nhdpIib2HopSetTable'."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetEntry 5 }


   --
   -- Neighbor Information Base (NIB)
   --
   -- Each router maintains a Neighbor Information Base 
   -- that records information about addresses of 
   -- current and recently symmetric 1-hop neighbors.


   --     NIB Neighbor Set
   --         Entry (foreach discovered 1-hop neighbor:
   --                N_neighbor_addr_list, N_symmetric)
   --     The NIB Neighbor Set Table is small because
   --     most of the corresponding information is found
   --     in the nhdpDiscoveredIfTable above.
   --
   nhdpNibNeighborSetTable OBJECT-TYPE
      SYNTAX       SEQUENCE OF NhdpNibNeighborSetEntry
      MAX-ACCESS   not-accessible
      STATUS       current
      DESCRIPTION
          "A router's Neighbor Set records all 
           network addresses of each 1-hop 
           neighbor."
      REFERENCE
         "RFC6130."
   ::= { nhdpStateObjGrp 6 }

   nhdpNibNeighborSetEntry  OBJECT-TYPE
      SYNTAX      NhdpNibNeighborSetEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "A router's Neighbor Set consists 
           of Neighbor Tuples, each representing 
           a single 1-hop neighbor:

           (N_neighbor_addr_list, N_symmetric)
           "
      REFERENCE
         "RFC6130."
      INDEX { nhdpDiscRouterIndex }
   ::= { nhdpNibNeighborSetTable 1 }

    NhdpNibNeighborSetEntry ::=
       SEQUENCE {
          nhdpNibNeighborSetNSymmetric
            TruthValue
         }

   nhdpNibNeighborSetNSymmetric  OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpNibNeighborNSymmetric corresponds
         to N_symmetric of NHDP."
      REFERENCE
         "RFC6130."
   ::= { nhdpNibNeighborSetEntry 1 }



  --     Lost Neighbor Set 
  --         Entry ( foreach recently lost 
  --                 1-hop neighbor router): 
  --                          (NL_neighbor_addrs, NL_time)
  --
    nhdpNibLostNeighborSetTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpNibLostNeighborSetEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
           "A router's Lost Neighbor Set records network 
           addresses of routers which recently were 
           symmetric 1-hop neighbors, but which are now
           advertised as lost."
       REFERENCE
          "RFC6130."
    ::= { nhdpStateObjGrp 7 }

    nhdpNibLostNeighborSetEntry  OBJECT-TYPE
       SYNTAX      NhdpNibLostNeighborSetEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "A router's Lost Neighbor Set consists of 
          Lost Neighbor Tuples, each representing a 
          single such network address:

          (NL_neighbor_addr, NL_time)"
       REFERENCE
          "RFC6130."
       INDEX { nhdpDiscRouterIndex }
    ::= { nhdpNibLostNeighborSetTable 1 }

    NhdpNibLostNeighborSetEntry ::=
       SEQUENCE {
          nhdpNibLostNeighborSetNLTime
            TimeStamp
         }

   nhdpNibLostNeighborSetNLTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "nhdpNibLostNeighborSetNLTime
          specifies the sysUptime 
          when to expire this entry and remove it from the
          'nhdpNibLostNeighborSetTable'."
      REFERENCE
         "RFC6130."
   ::= { nhdpNibLostNeighborSetEntry 1 }



--
-- nhdpPerformanceObjGrp
--

-- Contains objects which help to characterize the performance of
-- the NHDP process, typically counters.
--
nhdpPerformanceObjGrp OBJECT IDENTIFIER ::= { nhdpObjects 3 }

  --
  -- Objects per local interface
  --
  
  nhdpInterfacePerfTable  OBJECT-TYPE
      SYNTAX      SEQUENCE OF NhdpInterfacePerfEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "This table summarizes performance objects that are
          measured per local NHDP interface."
      REFERENCE
         "RFC6130."
   ::= { nhdpPerformanceObjGrp 1 }

   nhdpInterfacePerfEntry OBJECT-TYPE
      SYNTAX      NhdpInterfacePerfEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "A single entry contains performance counters for
          a local NHDP interface."
      INDEX { nhdpIfIndex }
   ::= { nhdpInterfacePerfTable 1 }

   NhdpInterfacePerfEntry ::=
      SEQUENCE {
         nhdpIfHelloMessageXmits
            Counter32,
         nhdpIfHelloMessageRecvd
            Counter32,
         nhdpIfHelloMessageXmitAccumulatedSize
            Counter64,
         nhdpIfHelloMessageRecvdAccumulatedSize
            Counter64,
         nhdpIfHelloMessageTriggeredXmits
            Counter32,
         nhdpIfHelloMessagePeriodicXmits
            Counter32,
         nhdpIfHelloMessageXmitAccumulatedSymmetricNeighborCount
            Counter32,
         nhdpIfHelloMessageXmitAccumulatedHeardNeighborCount
            Counter32,
         nhdpIfHelloMessageXmitAccumulatedLostNeighborCount
            Counter32
         }
  
   nhdpIfHelloMessageXmits  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented each time a HELLO
         message has been transmitted on that interface."
   ::= { nhdpInterfacePerfEntry 1 }

   nhdpIfHelloMessageRecvd  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented each time a
         HELLO message has been received on that interface."
   ::= { nhdpInterfacePerfEntry 2 }

   nhdpIfHelloMessageXmitAccumulatedSize  OBJECT-TYPE
      SYNTAX      Counter64
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented by the number of octets in
         a HELLO message each time a
         HELLO message has been sent."
   ::= { nhdpInterfacePerfEntry 3 }

   nhdpIfHelloMessageRecvdAccumulatedSize  OBJECT-TYPE
      SYNTAX      Counter64
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented by the number of octets in
         a HELLO message each time a
         HELLO message has been received."
   ::= { nhdpInterfacePerfEntry 4 }

   nhdpIfHelloMessageTriggeredXmits  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented each time a triggered
         HELLO message has been sent."
   ::= { nhdpInterfacePerfEntry 5 }

   nhdpIfHelloMessagePeriodicXmits  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented each time a periodic
         HELLO message has been sent."
   ::= { nhdpInterfacePerfEntry 6 }
    
   nhdpIfHelloMessageXmitAccumulatedSymmetricNeighborCount  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented by the number of advertised
         symmetric neighbors in a HELLO each time a HELLO 
         message has been sent."
   ::= { nhdpInterfacePerfEntry 7 }
   
   nhdpIfHelloMessageXmitAccumulatedHeardNeighborCount  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented by the number of advertised
         heard neighbors in a HELLO each time a HELLO 
         message has been sent."
   ::= { nhdpInterfacePerfEntry 8 }
   
   nhdpIfHelloMessageXmitAccumulatedLostNeighborCount  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "A counter is incremented by the number of advertised
         lost neighbors in a HELLO each time a HELLO 
         message has been sent."
   ::= { nhdpInterfacePerfEntry 9 }
  
  
  
  --
  -- Objects per discovered neighbor interface
  --
  nhdpDiscIfSetPerfTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpDiscIfSetPerfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A router's set of performance properties for 
          each discovered interface of a neighbor."
       REFERENCE
          "RFC6130."
   ::= { nhdpPerformanceObjGrp 2 }
   
   
   nhdpDiscIfSetPerfEntry  OBJECT-TYPE
       SYNTAX      NhdpDiscIfSetPerfEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "There is an entry for each discovered 
          interface of a neighbor."
       REFERENCE
          "RFC6130."
       INDEX { nhdpDiscIfIndex }
   ::= { nhdpDiscIfSetPerfTable 1 }

    NhdpDiscIfSetPerfEntry ::=
       SEQUENCE {
          nhdpDiscIfRecvdPackets
            Counter32,
          nhdpDiscIfExpectedPackets
            Counter32
         }
   
   nhdpDiscIfRecvdPackets  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This counter increments each
         time this router receives a packet from that interface
         of the neighbor."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetPerfEntry 1 }

   nhdpDiscIfExpectedPackets  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This counter increments by the number
          of missed packets from this neighbor based 
          on the packet sequence number each time this 
          router receives a packet from that interface
          of the neighbor."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscIfSetPerfEntry 2 }


   
   --
   -- Objects concerning the neighbor set
   --
   nhdpNibNeighborSetChanges  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This counter increments each time the Neighbor Set changes.
         A change occurs whenever a new Neighbor Tuple has been 
         added, a Neighbor Tuple has been removed or any entry of 
         a Neighbor Tuple has been modified."
   ::= { nhdpPerformanceObjGrp 3 }

   

   --
   -- Objects per discovered neighbor
   --
   nhdpDiscNeighborSetPerfTable OBJECT-TYPE
      SYNTAX       SEQUENCE OF NhdpDiscNeighborSetPerfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A router's set of discovered neighbors and
           their properties."
       REFERENCE
          "RFC6130."
   ::= { nhdpPerformanceObjGrp 4 }

   nhdpDiscNeighborSetPerfEntry  OBJECT-TYPE
       SYNTAX      NhdpDiscNeighborSetPerfEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "The entries include the nhdpDiscRouterIndex of
           the discovered router, as well as performance
           objects related to changes of the Neighbor
           Set."
       REFERENCE
          "RFC6130."
       INDEX { nhdpDiscRouterIndex }
   ::= { nhdpDiscNeighborSetPerfTable 1 }

    NhdpDiscNeighborSetPerfEntry ::=
       SEQUENCE {
          nhdpDiscNeighborNibNeighborSetChanges
            Counter32,
          nhdpDiscNeighborNibNeighborSetUpTime
            TimeStamp,
          nhdpDiscNeighborNibNeighborSetReachableLinkChanges
            Counter32
         }

   nhdpDiscNeighborNibNeighborSetChanges  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object returns the number of changes 
         to the given Neighbor Tuple."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscNeighborSetPerfEntry 1 }


   nhdpDiscNeighborNibNeighborSetUpTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object returns the sysUpTime when
         the neighbor becomes 'nbrup'.  A neighbor is
         said to become 'nbrup' if a new nhdpNibNeighborSetEntry 
         is created for a particular nhdpNibNeighborSetRouterIndex. 
         It becomes 'nbrdown' if the entry for that neighbor
         has been deleted."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscNeighborSetPerfEntry 2 }
   
   nhdpDiscNeighborNibNeighborSetReachableLinkChanges  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object counts each time the neighbor changes 
          the interface(s) over which it is reachable. 
          A change in the set of Link Tuples corresponding
          to the appropriate Neighbor Tuple is registered, 
          i.e. a corresponding Link Tuple is added or removed
          from the set of all corresponding Link Tuples."
      REFERENCE
         "RFC6130."
   ::= { nhdpDiscNeighborSetPerfEntry 3 }




   --
   -- Objects per discovered 2-hop neighbor
   --
      nhdpIib2HopSetPerfTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF NhdpIib2HopSetPerfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
           "This table contains performance objects per
           discovered 2-hop neighbor."
       REFERENCE
          "RFC6130."
    ::= { nhdpPerformanceObjGrp 5 }

    nhdpIib2HopSetPerfEntry  OBJECT-TYPE
       SYNTAX      NhdpIib2HopSetPerfEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
          "The entries contain performance objects per
           discovered 2-hop neighbor."
       REFERENCE
          "RFC6130."
       INDEX { nhdpDiscRouterIndex }
    ::= { nhdpIib2HopSetPerfTable 1 }

    NhdpIib2HopSetPerfEntry ::=
       SEQUENCE {
          nhdpIib2HopSetPerfChanges
            Counter32,
          nhdpIib2HopSetPerfUpTime
            TimeStamp
         }

   nhdpIib2HopSetPerfChanges  OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object counts the changes of the union of all
         N2_neighbor_iface_addr_list of 2-Hop Tuples with an 
         N2_2hop_addr equal to one of the given 2-hop 
         neighbor's addresses."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetPerfEntry 1 }


   nhdpIib2HopSetPerfUpTime  OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object returns the sysUpTime
         when the 2-Hop Tuple
         corresponding to the given 2-hop neighbor IP address 
         was registered in the nhdpIib2HopSetTable."
      REFERENCE
         "RFC6130."
   ::= { nhdpIib2HopSetPerfEntry 2 }





--
-- nhdpNotifications
--

nhdpNotificationsControl OBJECT IDENTIFIER ::= { nhdpNotifications 1 }
nhdpNotificationsObjects OBJECT IDENTIFIER ::= { nhdpNotifications 2 }
nhdpNotificationsStates  OBJECT IDENTIFIER ::= { nhdpNotifications 3 }


   -- nhdpNotificationsControl

   nhdpNbrStateChangeThreshold OBJECT-TYPE
          SYNTAX       Integer32 (0..255)
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A threshold value for the
              nhdpNbrStateChange object.  If the
              number of occurrences exceeds this threshold
              within the previous nhdpNbrStateChangeWindow,
              then the nhdpNbrStateChange notification
              is to be sent.

              It is recommended that the value of this
              threshold be set to at least 10, and higher
              in dense topologies with frequent expected
              topology changes.
             "
          DEFVAL { 10 }
          ::= { nhdpNotificationsControl 1 }

   nhdpNbrStateChangeWindow OBJECT-TYPE
          SYNTAX       TimeTicks
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A time window for the
              nhdpNbrStateChange object.  If the
              number of occurrences exceeds the 
              nhdpNbrStateChangeThreshold
              within the previous nhdpNbrStateChangeWindow,
              then the nhdpNbrStateChange notification
              is to be sent.

              It is recommended that the value for this
              window be set to at least 5 times the 
              nhdpHelloInterval
              (whose default value is 2000 milliseconds).

              This object represents the time in hundredths
              of a second.
             "
          DEFVAL { 1000 }
          ::= { nhdpNotificationsControl 2 }

   nhdp2HopNbrStateChangeThreshold OBJECT-TYPE
          SYNTAX       Integer32 (0..255)
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A threshold value for the
              nhdp2HopNbrStateChange object.  If the
              number of occurrences exceeds this threshold
              within the previous nhdp2HopNbrStateChangeWindow,
              then the nhdp2HopNbrStateChange notification
              is to be sent.

              It is recommended that the value of this
              threshold be set to at least 10, and higher
              when topologies are expected to be highly dynamic.
             "
          DEFVAL { 10 }
          ::= { nhdpNotificationsControl 3 }

   nhdp2HopNbrStateChangeWindow OBJECT-TYPE
          SYNTAX       TimeTicks
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A time window for the
              nhdp2HopNbrStateChange object.  If the
              number of occurrences exceeds the 
              nhdp2HopNbrStateChangeThreshold
              within the previous nhdp2HopNbrStateChangeWindow,
              then the nhdp2HopNbrStateChange notification
              is to be sent.

              It is recommended that the value for this
              window be set to at least 5 times 
              nhdpHelloInterval
              (whose default value is 2000 milliseconds).

              This object represents the time in hundredths
              of a second.
             "
          DEFVAL { 1000 }
          ::= { nhdpNotificationsControl 4 }

   nhdpIfRxBadPacketThreshold OBJECT-TYPE
          SYNTAX       Integer32 (0..255)
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A threshold value for the
              nhdpIfRxBadPacket object.  If the
              number of occurrences exceeds this threshold
              within the previous nhdpIfRxBadPacketWindow,
              then the nhdpIfRxBadPacket notification
              is to be sent.
             "
          DEFVAL { 10 }
          ::= { nhdpNotificationsControl 5 }

   nhdpIfRxBadPacketWindow OBJECT-TYPE
          SYNTAX       TimeTicks
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A time window for the
              nhdpIfRxBadPacket object.  If the
              number of occurrences exceeds the 
              nhdpIfRxBadPacketThreshold
              within the previous nhdpIfRxBadPacketWindow,
              then the nhdpIfRxBadPacket notification
              is to be sent.

              It is recommended that the value for this
              window be set to 5 times the nhdpHelloInterval
              (whose default value is 2000 milliseconds).

              This object represents the time in hundredths
              of a second.
             "
          DEFVAL { 1000 }
          ::= { nhdpNotificationsControl 6 }



   -- nhdpNotificationsObjects
   
   nhdpNbrStateChange NOTIFICATION-TYPE
          OBJECTS { nhdpIfIndex,  -- The originator of
                                  --     the notification.
                    nhdpNbrState  -- The new state
                  }
          STATUS       current
          DESCRIPTION
             "nhdpNbrStateChange is a notification sent when a 
             significant number of neighbors change their status 
             (i.e. down, asymmetric, or symmetric) in a short 
             time. The network administrator should select 
             appropriate values for 'significant number of 
             neighbors' and 'short time'."
          ::= { nhdpNotificationsObjects 1 }

    nhdp2HopNbrStateChange NOTIFICATION-TYPE
          OBJECTS { nhdpIfIndex,      -- The originator 
                                      -- of the notification
                    nhdp2HopNbrState  -- The new state
             }
          STATUS       current
          DESCRIPTION
             "nhdp2HopNbrStateChange is a notification sent 
             when a significant number of 2-hop neighbors 
             change their status (i.e. up or down) in a short 
             time. The network administrator should select 
             appropriate values for 'significant number of 
             neighbors' and 'short time'."
          ::= { nhdpNotificationsObjects 2 }

   nhdpIfRxBadPacket NOTIFICATION-TYPE
          OBJECTS { nhdpDiscRouterIndex, -- The originator of
                                         -- the notification
                    nhdpIfIndex,         -- The interface on which the 
                                         -- packet has been received
                    nhdpPacketSrcAddrType, -- The type of the source IP
                                         -- address of the packet
                    nhdpPacketSrcAddr    -- The source IP address of 
                                         -- the packet
             }
          STATUS       current
          DESCRIPTION
             "nhdpIfRxBadPacket is a notification sent when a 
             significant number of incoming packets have not 
             been successfully parsed in a short time. The 
             network administrator should select appropriate 
             values for 'significant number of neighbors' 
             and 'short time'."
          ::= { nhdpNotificationsObjects 3 }


   nhdpIfStateChange NOTIFICATION-TYPE
          OBJECTS { nhdpIfIndex, -- The local interface
                    nhdpIfState  -- The new state
             }
          STATUS       current
          DESCRIPTION
             "nhdpIfStateChange is a notification sent when 
             the status of an interface of this router has 
             changed (i.e. an IP address has been added or 
             removed to the interface, or the interface has 
             changed its status from up to down or vice versa)."
          ::= { nhdpNotificationsObjects 4 }

          


    -- nhdpNotificationStates

    nhdpNbrState OBJECT-TYPE
       SYNTAX       INTEGER {
                       down(0),
                       asymmetric(1),
                       symmetric(2)
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "NHDP neighbor states. In NHDP, note that it is not 
           necessary to remove Protocol Tuples from Protocol Sets 
           at the exact time indicated, only to behave as if the 
           Protocol Tuples were removed at that time.  This case is 
           indicated here as 'down(0)', all other cases being
           indicated as 'assymetric(1)' or 'symmetric(2)'. If down, 
           the direct neighbor is also added to the 
           nhdpNibLostNeighborSetTable.
           "
       ::= { nhdpNotificationsStates 1 }
          
   nhdp2HopNbrState OBJECT-TYPE
       SYNTAX       INTEGER {
                       down(0),
                       up(1)
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "NHDP 2-hop neighbor states.  In NHDP, note that it is not
           necessary to remove Protocol Tuples from Protocol Sets
           at the exact time indicated, only to behave as if the 
           Protocol Tuples were removed at that time. This case is
           indicated here as 'down(0)', otherwise as 'up(1)'."
       ::= { nhdpNotificationsStates 2 }
          
   nhdpIfState OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "NHDP MANET interface states.   This indicates whether 
           the interface is a MANET interface. A value of true(1) 
           indicates that the interface is a MANET interface.  
           A value of false(2) indicates that the interface is 
           not a MANET interface. This corresponds to the I_manet 
           parameter in the Local Interface Set.
          "
       ::= { nhdpNotificationsStates 3 }

  nhdpPacketSrcAddrType OBJECT-TYPE
           SYNTAX InetAddressType
           MAX-ACCESS read-only
           STATUS current
           DESCRIPTION
           "The IP address type of the
           address of an inbound packet that
           cannot be identified by a neighbor instance.

           Only the values ipv4(1) and ipv6(2) are supported.
           "
          ::= { nhdpNotificationsStates 4 }        
          
   nhdpPacketSrcAddr OBJECT-TYPE
          SYNTAX       InetAddress
          MAX-ACCESS   read-only
          STATUS       current
          DESCRIPTION
             "The IP address of an inbound packet that 
             cannot be identified by a neighbor instance. When
             the last value of a notification using this object is
             needed, but no notifications of that type have been sent,
             this value pertaining to this object should
             be returned as 0.0.0.0 or :: respectively.
             "
          ::= { nhdpNotificationsStates 5 }




--
-- nhdpConformance information
--

nhdpCompliances       OBJECT IDENTIFIER ::= { nhdpConformance 1 }
nhdpMIBGroups         OBJECT IDENTIFIER ::= { nhdpConformance 2 }


-- Compliance Statements
nhdpBasicCompliance MODULE-COMPLIANCE
  STATUS current
  DESCRIPTION
    "The basic implementation requirements for
     managed network entities that implement
     NHDP."
  MODULE -- this module
  
  MANDATORY-GROUPS { nhdpConfigurationGroup }

  OBJECT  nhdpLibLocalIfSetIpAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibLocalIfSetIpAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibRemovedIfAddrSetIpAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibRemovedIfAddrSetIpAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  ::= { nhdpCompliances 1 }


nhdpFullCompliance MODULE-COMPLIANCE
  STATUS current
  DESCRIPTION
    "The full implementation requirements for
     managed network entities that implement
     NHDP."
  MODULE -- this module
  
  MANDATORY-GROUPS { nhdpConfigurationGroup,
                     nhdpStateGroup,
                     nhdpPerformanceGroup,
                     nhdpNotificationObjectGroup,
                     nhdpNotificationGroup,
                     nhdpPerformanceGroup }

  -- Configuration Group
  OBJECT  nhdpLibLocalIfSetIpAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibLocalIfSetIpAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibRemovedIfAddrSetIpAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpLibRemovedIfAddrSetIpAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  -- State Group
  OBJECT  nhdpDiscIfSetIpAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpDiscIfSetIpAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  -- Notification Group
  OBJECT  nhdpPacketSrcAddrType
  SYNTAX  InetAddressType { ipv4(1), ipv6(2) }
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."

  OBJECT  nhdpPacketSrcAddr
  SYNTAX  InetAddress (SIZE(4|16))
  DESCRIPTION
      "An implementation is only required to support 
       IPv4 and IPv6 addresses."



  ::= { nhdpCompliances 2 }


--
-- Units of Conformance
--

  nhdpConfigurationGroup OBJECT-GROUP
     OBJECTS {
              nhdpIfStatus,
              nhdpHelloInterval,
              nhdpHelloMinInterval,
              nhdpRefreshInterval,
              nhdpLHoldTime,
              nhdpHHoldTime,
              nhdpHystAcceptQuality,
              nhdpHystRejectQuality,
              nhdpInitialQuality,
              nhdpInitialPending,
              nhdpHpMaxJitter,
              nhdpHtMaxJitter,
              nhdpNHoldTime,
              nhdpIHoldTime,
              nhdpIfRowStatus,
              nhdpLibLocalIfSetIpAddrType,
              nhdpLibLocalIfSetIpAddr,
              nhdpLibLocalIfSetIpAddrPrefixLen,
              nhdpLibLocalIfSetIsManet,
              nhdpLibRemovedIfAddrSetIpAddrType,
              nhdpLibRemovedIfAddrSetIpAddr,
              nhdpLibRemovedIfAddrSetIpAddrPrefixLen,
              nhdpLibRemovedIfAddrSetIfIndex,
              nhdpLibRemovedIfAddrSetIRTime
             }
      STATUS  current
      DESCRIPTION
         "Set of NHDP configuration objects implemented
          in this module."
   ::= { nhdpMIBGroups 2 }

  nhdpStateGroup OBJECT-GROUP
     OBJECTS {
              nhdpUpTime,
              nhdpIfIndex,
              nhdpIfStateUpTime,
              nhdpDiscRouterIndex,
              nhdpDiscIfIndex,
              nhdpDiscIfSetIpAddrType,
              nhdpDiscIfSetIpAddr,
              nhdpDiscIfSetIpAddrPrefixLen,
              nhdpIibLinkSetLHeardTime,
              nhdpIibLinkSetLSymTime,
              nhdpIibLinkSetLPending,
              nhdpIibLinkSetLLost,
              nhdpIibLinkSetLTime,
              nhdpIib2HopSetIpAddrPrefixLen,
              nhdpIib2HopSet1HopIfIndex,
              nhdpIib2HopSetN2Time,
              nhdpNibNeighborSetNSymmetric,
              nhdpNibLostNeighborSetNLTime
             }
      STATUS  current
      DESCRIPTION
         "Set of NHDP state objects implemented
          in this module."
   ::= { nhdpMIBGroups 3 }

  nhdpPerformanceGroup OBJECT-GROUP
     OBJECTS {
              nhdpIfHelloMessageXmits, 
              nhdpIfHelloMessageRecvd,
              nhdpIfHelloMessageXmitAccumulatedSize,
              nhdpIfHelloMessageRecvdAccumulatedSize,            
              nhdpIfHelloMessageTriggeredXmits,
              nhdpIfHelloMessagePeriodicXmits,
              nhdpIfHelloMessageXmitAccumulatedSymmetricNeighborCount,
              nhdpIfHelloMessageXmitAccumulatedHeardNeighborCount,
              nhdpIfHelloMessageXmitAccumulatedLostNeighborCount,
              nhdpDiscIfRecvdPackets,
              nhdpDiscIfExpectedPackets,
              nhdpNibNeighborSetChanges,
              nhdpDiscNeighborNibNeighborSetChanges,
              nhdpDiscNeighborNibNeighborSetUpTime,
              nhdpDiscNeighborNibNeighborSetReachableLinkChanges,
              nhdpIib2HopSetPerfChanges,
              nhdpIib2HopSetPerfUpTime
            }
      STATUS  current
      DESCRIPTION
         "Set of NHDP performance objects implemented
          in this module."
   ::= { nhdpMIBGroups 4 }
   
    nhdpNotificationObjectGroup OBJECT-GROUP
      OBJECTS {
            nhdpNbrStateChangeThreshold,
            nhdpNbrStateChangeWindow,
            nhdp2HopNbrStateChangeThreshold,
            nhdp2HopNbrStateChangeWindow,
            nhdpIfRxBadPacketThreshold,
            nhdpIfRxBadPacketWindow,
            nhdpIfState,
            nhdpNbrState,
            nhdp2HopNbrState,
            nhdpPacketSrcAddrType,
            nhdpPacketSrcAddr
      }
      STATUS current
      DESCRIPTION
      "Set of NHDP notification objects implemented
      in this module."
   ::= { nhdpMIBGroups 5 }
   
   

  nhdpNotificationGroup NOTIFICATION-GROUP
     NOTIFICATIONS {
             nhdpNbrStateChange,
             nhdp2HopNbrStateChange,
             nhdpIfRxBadPacket,
             nhdpIfStateChange
             }
      STATUS  current
      DESCRIPTION
         "Set of NHDP notifications implemented
          in this module."
   ::= { nhdpMIBGroups 6 }


END
    

8. Security Considerations

This MIB module defines objects for the configuration, monitoring and notification of the Neighborhood Discovery Protocol [RFC6130]. NHDP allows routers to acquire topological information up to two hops away by virtue of exchanging HELLO messages. The information acquired by NHDP may be used by routing protocols. The neighborhood information, exchanged between routers using NHDP, serves these routing protocols as a baseline for calculating paths to all destinations in the MANET, relay set selection for network-wide transmissions etc.

There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These are the tables and objects and their sensitivity/vulnerability:

• nhdpIfStatus - this writable object turns on or off the NHDP process for the specified interface. If disabled, higher level protocol functions, e.g., routing, would fail causing network-wide disruptions.
• nhdpHelloInterval, nhdpHelloMinInterval, and nhdpRefreshInterval - these writable objects control the rate at which HELLO messages are sent on a wireless interface. If set at too high a rate, this could represent a form of DOS attack by overloading interface resources.
• nhdpHystAcceptQuality, nhdpHystRejectQuality, nhdpInitialQuality, nhdpInitialPending - these writable objects affect the perceived quality of the NHDP links and hence the overall stability of the network. If improperly set, these settings could result in network-wide disruptions.
• nhdpInterfaceTable - this table contains writable objects that affect the overall performance and stability of the NHDP process. Failure of the NHDP process would result in network-wide failure. Particularly sensitive objects from this table are discussed in the previous list items. This is the only table in the NHDP-MIB module with writable objects.

Some of the readable objects in this MIB module (i.e., objects with a MAX-ACCESS other than not-accessible) may be considered sensitive or vulnerable in some network environments. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. These are the tables and objects and their sensitivity/vulnerability:

• nhdpDiscIfSetTable - The contains information on discovered neighbors, specifically their IP address in the nhdpDiscIfSetIpAddr object. This information provides an adversary broad information on the members of the MANET, located within this single table. This information can be use to expedite attacks on the other members of the MANET without having to go through a laborious discovery process on their own. This object is the index into the table, and has a MAX-ACCESS of 'not-accessible'. However, this information can be exposed using SNMP operations.

MANET technology is often deployed to support communications of emergency services or military tactical applications. In these applications, it is imperative to maintain the proper operation of the communications network and to protect sensitive information related to its operation. Therefore, when implementing these capabilities, the full use of SNMPv3 cryptographic mechanisms for authentication and privacy is RECOMMENDED.

SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPSec), there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB module.

It is RECOMMENDED that implementers consider the security features as provided by the SNMPv3 framework (see [RFC3410], section 8), including full support for the SNMPv3 cryptographic mechanisms (for authentication and privacy).

Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them.

9. IANA Considerations

Editor's Note (to be removed prior to publication): the IANA is requested to assign a value for "XXXX" under the 'mib-2' subtree and to record the assignment in the SMI Numbers registry. When the assignment has been made, the RFC Editor is asked to replace "XXXX" (here and in the MIB module) with the assigned value and to remove this note. Note well: prior to official assignment by the IANA, a draft document MUST use placeholders (such as "XXXX" above) rather than actual numbers. See RFC4181 Section 4.5 for an example of how this is done in a draft MIB module.

10. Acknowledgements

The authors wish to thank Thomas Clausen, Justin Dean, and Adrian Farrel for their detailed reviews and insightful comments to this document.

This MIB document uses the template authored by D. Harrington which is based on contributions from the MIB Doctors, especially Juergen Schoenwaelder, Dave Perkins, C.M.Heard and Randy Presuhn.

11. References

11.1. Normative References

11.2. Informative References

Appendix A.

***************************************************************
* Note to the RFC Editor (to be removed prior to publication) *
*                                                             *
* The reference to RFCXXXX within the DESCRIPTION clauses     *
* of the MIB module point to this draft and are to be         *
* assigned by the RFC Editor.                                 *
*                                                             *
***************************************************************
          

Authors' Addresses