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Catalyst 3750 Switch Software Configuration Guide
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Chapter 35 Configuring HSRP
Configuring HSRP
Beginning in privileged EXEC mode, follow these steps to create or enable HSRP on a Layer 3 interface:
Use the no standby [group-number] ip [ip-address] interface configuration command to disable HSRP.
This example shows how to activate HSRP for group 1 on a port. The IP address used by the hot standby
group is learned by using HSRP.
Note This procedure is the minimum number of steps required to enable HSRP.
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no switchport
Switch(config-if)# standby 1 ip
Switch(config-if)# end
Switch# show standby
Configuring HSRP Group Attributes
Although HSRP can run with no other configuration required, you can configure attributes for the HSRP
group, including authentication, priority, preemption and preemption delay, timers, or MAC address.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and enter the Layer 3 interface on
which you want to enable HSRP.
Step 3
standby [group-number] ip [ip-address
[secondary]]
Create (or enable) the HSRP group using its number and virtual IP
address.
• (Optional) group-number—The group number on the interface for
which HSRP is being enabled. The range is 0 to 255; the default is 0.
If there is only one HSRP group, you do not need to enter a group
number.
• (Optional on all but one interface) ip-address—The virtual IP address
of the hot standby router interface. You must enter the virtual IP
address for at least one of the interfaces; it can be learned on the other
interfaces.
• (Optional) secondary—The IP address is a secondary hot standby
router interface. If neither router is designated as a secondary or
standby router and no priorities are set, the primary IP addresses are
compared and the higher IP address is the active router, with the next
highest as the standby router.
Step 4
end Return to privileged EXEC mode.
Step 5
show standby [interface-id [group]] Verify the configuration.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
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