Cisco Systems 78-11741-02 Enabling Hsrp MIB Traps, Enabling Hsrp Support for Mpls VPNs, IPC-103

Configuring IP Services

Configuring the Hot Standby Router Protocol

Command	Purpose
Router(config-if)#standby mac-refresh seconds	Changes the interval at which refresh packets are sent.

For examples of this feature, see the section “HSRP MAC Refresh Interval Examples” at the end of this chapter.

Enabling HSRP MIB Traps

With Cisco IOS Release 12.0(3)T, the software supports the HSRP Management MIB feature. HSRP MIB supports Simple Network Management Protocol (SNMP) Get operations, to allow network devices to get reports about HSRP groups in a network from the network management station.

Enabling HSRP MIB trap support is done from the command-line interface (CLI), and the MIB is used for getting the reports. A trap notifies the network management station when a router leaves or enters the active or standby state. When an entry is configured from the CLI, the RowStatus for that group in the MIB immediately goes to the active state.

The Cisco IOS software supports a read-only version of the MIB, and set operations are not supported.

This feature supports four MIB tables, as follows:

•cHsrpGrpEntry table defined in CISCO-HSRP-MIB.my

•cHsrpExtIfTrackedEntry, cHsrpExtSecAddrEntry, and cHsrpExtIfEntry defined in CISCO-HSRP-EXT-MIB.my

The cHsrpGrpEntry table consists of all the group information defined in RFC 2281, Cisco Hot Standby Router Protocol; the other tables consist of the Cisco extensions to RFC 2281, which are defined in CISCO-HSRP-EXT-MIB.my.

To enable HSRP MIB trap support, use the following commands in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# snmp-server enable traps hsrp	Enables the router to send SNMP traps and informs, and
		HSRP notifications.
Step 2
	Router(config)# snmp-server host host	Specifies the recipient of an SNMP notification operation,
	community-string hsrp	and that HSRP notifications be sent to the host.

See the section “HSRP MIB Trap Example” later in this chapter for an example of how to configure HSRP MIB trap support in your network. See the “Configuring SNMP” chapter in the Cisco IOS Configuration Fundamentals Configuration Guide for more information on configuring SNMP.

Enabling HSRP Support for MPLS VPNs

HSRP support on an MPLS VPN interface is useful when an Ethernet is connected between two provider edges (PEs) with either of the following conditions:

•A customer edge (CE) with a default route to the HSRP virtual IP address

•One or more hosts with the HSRP virtual IP address configured as the default gateway

Cisco IOS IP Configuration Guide

IPC-103