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 Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
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.
DETAILED STEPS
Configuration Examples for NHRP MIB
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
| Related Topic |
Document Title |
|---|---|
| Cisco IOS commands |
|
| 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 |
Cisco IOS Security Command Reference |
Standards
| Standard |
Title |
|---|---|
| None |
-- |
MIBs
| MIB |
MIBs Link |
|---|---|
| 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
| RFC |
Title |
|---|---|
| RFC 2677 |
Definitions of Managed Objects for the NBMA Next Hop Resolution Protocol (NHRP) |
Technical Assistance
| Description |
Link |
|---|---|
| The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for NHRP MIB
The following table provides release information about the feature or features described in this module. This table 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.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
| Table 1 | Feature Information for NHRP MIB |
| Feature Name |
Releases |
Feature Information |
|---|---|---|
| NHRP MIB for DMVPN Networks |
Cisco IOS XE Release 2.5 |
The Cisco NHRP MIB feature introduces support for the NHRP MIB, which helps to manage and monitor 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 following commands were introduced or modified: debug snmp mib nhrp, show snmp mib nhrp status. |
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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
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