Cisco Systems 3560 Manual Do Utilizador

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 

, half the clients are 

configured for Router A, and half the clients are configured for Router B. Together, the configuration for 
Routers A and B establishes 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 the example configuration steps. 

For MHSRP, you need to enter the standby preempt interface configuration command on the HSRP 
interfaces so that if a router fails and then comes back up, preemption restores load sharing.

These sections contain this configuration information:

121235

Active router for group 1
Standby router for group 2

Client 1

Router A

Router B

10.0.0.1

10.0.0.2

Active router for group 2
Standby router for group 1

Client 2

Client 3

Client 4