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Configuring HSRP Groups
To configure HSRP, assign the same virtual router address to each router
in the group. Set the highest virtual router priority on the router that will
serve as the master. Enable the preempt feature to allow a router to take
over as the master when it comes on line (if it has a higher priority). To
configure the backup routers with an order of precedence for assuming the
role of master, set the appropriate priority on each of these routers.Then
configure an authentication string to ensure that HSRP messages are only
be exchanged between authorized routers. You can also dynamically adjust
the virtual router priority by tracking the availability of any IP interfaces on
the router.
Command Usage
Address Assignment –
• The designated virtual IP address must be configured on at least one
router in the virtual router group. If an IP address is not specified, the
designated address is learned through the exchange of HSRP messages.
Note that the designated address cannot be the same as a physical
address.
• The subnet mask for the physical interface on which the designated
address is configured is used as the subnet mask of the designated
address. The interfaces of all routers participating in a virtual router
group must be within the same IP subnet.
• Configuring a new designated address on the current master router will
override the designated address currently is use.
• If multiple secondary addresses are configured on the current VLAN
interface, these addresses can also be supported on the virtual router
by selecting the “Secondary” Virtual IP mode.
• HSRP is enabled once the designated address and priority are
configured, and the master and standby routers are elected based on
highest priority. If you need to customize any of the other parameters