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Chapter 33
Configuring HSRP
Figure 33-1
Multiple HSRP
The switch supports Multiple HSRP (MHSRP), an extension of HSRP that allows load sharing between
two or more HSRP groups. You can configure MHSRP to achieve load balancing and to use two or more
standby groups (and paths) from a host network to a server network. In
are configured for Router A, and half of the clients are configured for Router B. Together, the
configuration for Routers A and B establish two HSRP groups. For group 1, Router A is the default active
router because it has the assigned highest priority, and Router B is the standby router. For group 2,
Router B is the default active router because it has the assigned highest priority, and Router A is the
standby router. During normal operation, the two routers share the IP traffic load. When either router
becomes unavailable, the other router becomes active and assumes the packet-transfer functions of the
router that is unavailable.
See the
For MHSRP, you need to enter the standby preempt interface configuration command on the HSRP
Note
interfaces so that if a router fails and then comes back up, preemption occurs and restores load sharing
78-17058-01
Typical HSRP Configuration
Host B
172.20.130.5
Active
router
172.20.128.1
Router A
172.20.128.32
Host C
"Configuring MHSRP" section on page 33-9
Virtual
Standby
router
router
172.20.128.3
Router B
Host A
for the example configuration steps.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Understanding HSRP
172.20.128.2
172.20.128.55
Figure
33-2, half of the clients
33-3
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