Cisco Catalyst 3120 User Manual

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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
OL-12247-01
Chapter 40 Configuring HSRP
Configuring HSRP
This example activates a port, sets an IP address and a priority of 120 (higher than the default value),
and waits for 300 seconds (5 minutes) before attempting to become the active router:
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no switchport
Switch(config-if)# standby ip 172.20.128.3
Switch(config-if)# standby priority 120 preempt delay 300
Switch(config-if)# end
Configuring MHSRP
To enable MHSRP and load-balancing, you configure two routers as active routers for their groups, with
virtual routers as standby routers. This example shows how to enable the MHSRP configuration shown
in Figure 40-2. You need to enter the standby preempt interface configuration command on each HSRP
interface so that if a router fails and comes back up, the preemption occurs and restores load-balancing.
Router A is configured as the active router for group 1, and Router B is configured as the active router
for group 2. The HSRP interface for Router A has an IP address of 10.0.0.1 with a group 1 standby
priority of 110 (the default is 100). The HSRP interface for Router B has an IP address of 10.0.0.2 with
a group 2 standby priority of 110.
Group 1 uses a virtual IP address of 10.0.0.3 and group 2 uses a virtual IP address of 10.0.0.4.
Router A Configuration
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no switchport
Switch(config-if)# ip address 10.0.0.1 255.255.255.0
Switch(config-if)# standby 1 ip 10.0.0.3
Switch(config-if)# standby 1 priority 110
Switch(config-if)# standby 1 preempt
Switch(config-if)# standby 2 ip 10.0.0.4
Switch(config-if)# standby 2 preempt
Switch(config-if)# end
Router B Configuration
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no switchport
Switch(config-if)# ip address 10.0.0.2 255.255.255.0
Switch(config-if)# standby 1 ip 10.0.0.3
Switch(config-if)# standby 1 preempt
Switch(config-if)# standby 2 ip 10.0.0.4
Switch(config-if)# standby 2 priority 110
Switch(config-if)# standby 2 preempt
Switch(config-if)# end
Configuring HSRP Authentication and Timers
You can optionally configure an HSRP authentication string or change the hello-time interval and
holdtime.

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English