NHRP MIB
The Cisco NHRP MIB feature introduces support for the NHRP MIB, which helps to manage and monitor the Next Hop Resolution Protocol (NHRP) via Simple Network Management Protocol (SNMP). Statistics can be collected and monitored via standards-based SNMP techniques (get operations) to query objects defined in the NHRP MIB. The NHRP MIB is VPN Routing and Forwarding (VRF) aware and supports VRF-aware queries.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for NHRP MIB" section.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
•
Configuration Examples for NHRP MIB
•Feature Information for NHRP MIB
Prerequisites for NHRP MIB
•You should be familiar with configuring SNMP.
Restrictions for NHRP MIB
•Cisco does not support all the MIB variables defined in RFC 2677, Definitions of Managed Objects for the NBMA Next Hop Resolution Protocol (NHRP). For a list of variables supported and other caveats of this feature, see the Agent Capabilities file. Cisco does not support the set operations defined in RFC 2677.
Information About NHRP MIB
CISCO-NHRP-MIB
CISCO-NHRP-MIB provides NHRP MIB information on managed objects relating to clients only, servers only, and clients and servers.
The NHRP MIB module contains ten tables of objects as follows:
•NHRP Cache Table
•NHRP Purge Request Table
•NHRP Client Table
•NHRP Client Registration Table
•NHRP Client NHS Table
•NHRP Client Statistics Table
•NHRP Server Table
•NHRP Server Cache Table
•NHRP Server NHC Table
•NHRP Server Statistics Table
The Cisco implementation supports all of the tables except the NHRP Purge Request Table.
RFC 2677
RFC 2677, Definitions of Managed Objects for the NBMA Next Hop Resolution Protocol (NHRP), describes managed objects that can be used to remotely monitor NHRP using SNMP and provide management information on the performance of NHRP.
How to Use NHRP MIB
No special configuration is needed to implement the NHRP MIB feature. The SNMP framework can be used to manage NHRP MIB. See the section "Configuration Examples for NHRP MIB" for an example of how to manage a VRF-aware NHRP MIB.
This section contains the following task:
Verifying NHRP MIB Status
Use this task to verify the NHRP MIB status.
SUMMARY STEPS
1. enable
2. show snmp mib nhrp status
DETAILED STEPS
Configuration Examples for NHRP MIB
•Example: Verifying NHRP MIB Status
•Example: VRF-Aware NHRP MIB Configuration
Example: Verifying NHRP MIB Status
The following output is from the show snmp mib nhrp status command:
Router# show snmp mib nhrp status
NHRP-SNMP Agent Feature: Enabled
NHRP-SNMP Tree State: Good
ListEnqueue Count = 0 Node Malloc Counts = 1
Spoke_103#
The "Enabled" status of "NHRP-SNMP Agent Feature:" indicates that the NHRP MIB is enabled. If the NHRP MIB was disabled, it would display "Disabled." "ListEnqueue Count" and "Node Malloc Counts" counts are internal counts. "ListEnqueue Count" indicates how many nodes are queued for freeing. "Node Malloc Counts" displays how many nodes are allocated.
Example: VRF-Aware NHRP MIB Configuration
The following is an example of how to configure a VRF table with the name Vrf1, for monitoring by SNMP:
ip vrf Vrf1
rd 198102
! Name of the SNMP VPN context
context Vrf1-context
!
crypto isakmp policy 1
authentication pre-share
crypto isakmp key cisco47 address 0.0.0.0
!
crypto ipsec transform-set trans2 esp-des esp-md5-hmac
!
crypto ipsec profile vpnprof
set transform-set trans2
!
interface Tunnel0
bandwidth 1000
! DMVPN tunnel for Vrf1 VPN
ip vrf forwarding Vrf1
ip address 10.0.0.1 255.255.255.0
ip mtu 1400
ip nhrp authentication sample
ip nhrp map multicast dynamic
ip nhrp network-id 99
ip nhrp holdtime 300
no ip split-horizon eigrp 1
ip tcp adjust-mss 1360
delay 1000
tunnel source Ethernet0
tunnel mode gre multipoint
tunnel key 100000
tunnel protection ipsec profile vpnprof
!
interface Ethernet0
ip address 172.17.0.1 255.255.255.0
!
interface Ethernet1
ip address 192.168.0.1 255.255.255.0
!
router eigrp 1
address-family ipv4 vrf Vrf1
network 10.0.0.0 0.0.0.255
network 192.168.0.0 0.0.0.255
no auto-summary
autonomous-system 1
exit-address-family
!
! V2C Community ABC for VRF Vrf1
snmp-server group abc v2c context V3red_context read view_V3
snmp-server view view_V3 iso included
snmp-server community abc RO
snmp-server community public RO
snmp-server context Vrf1_context
!
!
snmp mib community-map abc context Vrf1-context
Spoke Configuration for DMVPN Example
crypto isakmp policy 1
authentication pre-share
crypto isakmp key cisco47 address 0.0.0.0
!
crypto ipsec transform-set trans2 esp-des esp-md5-hmac
!
crypto ipsec profile vpnprof
set transform-set trans2
!
interface Tunnel0
bandwidth 1000
ip address 10.0.0.2 255.255.255.0
ip mtu 1400
ip nhrp authentication sample
ip nhrp map 10.0.0.1 172.17.0.1
ip nhrp map multicast 172.17.0.1
ip nhrp network-id 99
ip nhrp holdtime 300
ip nhrp nhs 10.0.0.1
ip tcp adjust-mss 1360
delay 1000
tunnel source Ethernet0
tunnel mode gre multipoint
tunnel key 100000
tunnel protection ipsec profile vpnprof
!
interface Ethernet0
ip address dhcp hostname Spoke1
!
interface Ethernet1
ip address 192.168.1.1 255.255.255.0
!
router eigrp 1
network 10.0.0.0 0.0.0.255
network 192.168.1.0 0.0.0.255
Additional References
Related Documents
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Cisco IOS commands |
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Description of SNMP, SNMP MIBs, and how to configure SNMP on Cisco devices |
"Configuring SNMP Support" chapter in the Cisco IOS Network Management Configuration Guide |
Security commands |
Standards
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None |
— |
MIBs
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CISCO-NHRP-MIB |
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
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RFC 2677 |
Definitions of Managed Objects for the NBMA Next Hop Resolution Protocol (NHRP) |
Technical Assistance
Feature Information for NHRP MIB
Table 1 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 1 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
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