Cisco Catalyst 5000 Series Installation And Configuration Note page 27

Figure 5
The VLAN 100 and VLAN 200 interfaces on RSFC A are configured as the active HSRP interfaces
for each VLAN (by setting the HSRP priority for the interfaces to 110). The VLAN 100 and
VLAN 200 interfaces on RSFC B are configured as the standby HSRP router interfaces (by leaving
the HSRP priority for the interfaces at the default value of 100).
Hosts in VLAN 100 are configured to use the VLAN 100 HSRP IP address (172.20.100.10) as their
default gateway. Hosts in VLAN 200 are configured to use the VLAN 200 HSRP IP address
(172.20.200.10) as their default gateway.
In this configuration, RSFC A actively routes traffic for the HSRP IP address and RSFC B provides
transparent backup interfaces. In the event of a failure of the active supervisor engine or RSFC A,
the standby interfaces on RSFC B become active and continue routing traffic from hosts using the
HSRP IP address as their default gateway.
RSFC A Configuration
This example shows how to configure HSRP for RSFC A:
Router#configure terminal
Enter configuration commands, one per line.
Router(config)#ip routing
Router(config)#router rip
Router(config-router)#network 172.20.0.0
Router(config-router)#interface vlan100
Router(config-if)#ip address 172.20.100.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#standby 100 ip 172.20.100.10
Router(config-if)#standby 100 priority 110
Router(config-if)#standby 100 preempt
Router(config-if)#standby 100 timers 5 15
Router(config-if)#standby 100 authentication Secret
Router(config-if)#interface vlan200
Router(config-if)#ip address 172.20.200.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#standby 200 ip 172.20.200.10
Router(config-if)#standby 200 priority 110
Router(config-if)#standby 200 preempt
Router(config-if)#standby 200 timers 5 15
Router(config-if)#standby 200 authentication Covert
Router(config-if)#^Z
Router#
Redundant RSFCs Using HSRP Example Network Topology
VLAN 100
IP subnet 172.20.100.0/24
Hosts
Catalyst 5000 Series Route Switch Feature Card Installation and Configuration Note
VLAN 200
IP subnet 172.20.200.0/24
RSFC A
RSFC B
Catalyst
5509
End with CNTL/Z.
Redundant RSFCs Using HSRP Example
Hosts
27