Cisco Systems 78-11741-02 Hsrp MIB Trap Example, Hsrp Support for Mpls VPNs Example, IPC-128

Configuring IP Services

IP Services Configuration Examples

HSRP MIB Trap Example

The following example shows how to configure HSRP on two routers and enable the HSRP MIB trap feature. As in many environments, one router is preferred as the active one by configuring it at a higher priority level and enabling preemption. In this example, the active router is referred to as the primary router. The second router is referred to as the backup router.

Primary Router Configuration

interface Ethernet1

ip address 15.1.1.1 255.255.0.0 no ip redirects

standby priority 200 standby preempt standby ip 15.1.1.3

snmp-server enable traps hsrp

snmp-server host yourhost.cisco.com public hsrp

Backup Router Configuration

interface Ethernet1

ip address 15.1.1.2 255.255.0.0 no ip redirects

standby priority 101 standby ip 15.1.1.3

snmp-server enable traps hsrp

snmp-server host myhost.cisco.com public hsrp

HSRP Support for MPLS VPNs Example

Figure 21 shows two PEs with HSRP running between their VRF interfaces. The CE is configured with the HSRP virtual IP address as its default route. HSRP is configured to track the interfaces connecting the PEs to the rest of the provider network. For example, if interface E1 of PE1 fails, the HSRP priority will be reduced such that PE2 takes over forwarding packets to the HSRP virtual IP address.

Figure 21 Topology Showing HSRP Support Between Two VRF Interfaces

P1

E1 E2

PE1 (Active)

10.2.0.20E0

(vrf1)

	E0
CE	Default route set to HSRP
	virtual IP address (10.2.0.20)

P2

E2 E1

PE2 (Standby)

E0 10.2.0.20 (vrf1)

E0

Host 45588

Cisco IOS IP Configuration Guide

IPC-128