Configuring Redundancy Using Hsrp - Cisco RJ-45-to-AUX Brochure

Configuring Redundancy Using HSRP

To configure HSRP on router interfaces, perform the following steps:
1. Enter Interface Configuration mode and identify a standby group and an IP address:
standby [group−number] ip [ip−address]
2. Identify the priority for the HSRP interface. The interface with the highest priority becomes active for
that HSRP group; the default is 100:
standby [group−number] priority priority
3. You can optionally configure the interface to preempt the current active HSRP interface and become
active if the interface priority is higher than the priority of the current active interface:
standby [group−number] preempt [delay delay]
4. You can also optionally set the HSRP Hello timer and holdtime timer for the interface. The default
values are 3 (Hello) and 10 (holdtime). All the interfaces in the HSRP group should use the same
timer values:
standby [group−number] timers hellotime holdtime
5. You can optionally identify a clear−text HSRP authentication string for the interface. Again, all
HSRP member interfaces in the HSRP group should use the same authentication string:
standby [group−number] authentication string
Now that you have seen the steps to configure HSRP on an interface, let's take a look at an example of
configuring HSRP on two different interfaces connected to the same network segment:
RSM1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
RSM1(config)#ip routing
RSM1(config)#router rip
RSM1(config−router)#network 172.16.0.0
RSM1(config−router)#interface vlan10
RSM1(config−if)#ip address 172.16.10.1 255.255.255.0
RSM1(config−if)#no shutdown
RSM1(config−if)#standby 10 ip 172.16.10.10
RSM1(config−if)#standby 10 priority 110
RSM1(config−if)#standby 10 preempt
RSM1(config−if)#standby 10 timers 5 15
RSM1(config−if)#standby 10 authentication Secret
RSM1(config−if)#interface vlan200
RSM1(config−if)#ip address 172.16.20.1 255.255.255.0
RSM1(config−if)#no shutdown
RSM1(config−if)#standby 20 ip 172.16.20.10
RSM1(config−if)#standby 20 priority 110
RSM1(config−if)#standby 20 preempt
RSM1(config−if)#standby 20 timers 5 15
RSM1(config−if)#standby 20 authentication Covert
RSM1(config−if)#^Z
RSM1#
RSM2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
RSM2(config)#ip routing
RSM2(config)#router rip
RSM2(config−router)#network 172.16.0.0
RSM2(config−router)#interface vlan10
RSM2(config−if)#ip address 172.16.10.2 255.255.255.0
RSM2(config−if)#no shutdown
RSM2(config−if)#standby 10 ip 172.16.10.10
RSM2(config−if)#standby 10 preempt
RSM2(config−if)#standby 10 timers 5 15
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