40-4
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter40 Configuring HSRP and Enhanced Object Tracking
Configuring HSRP
Figure 40-2 MHSRP Load Sharing

HSRP and Switch Stacks

HSRP hello messages are generated by the stack mast er. If an HSRP-active stack master fails, a flap in
the HSRP active state might occur. This is because HSRP hello messages are not generated while a new
stack master is elected and initialized, and the standby router might become active after the stack master
fails.
Configuring HSRP
These sections contain this configuration information:
•Default HSRP Configuration, page 40-5
•HSRP Configuration Guidelines, page 40-5
•Enabling HSRP, page 40-5
•Configuring HSRP Priority, page 40-7
•Configuring MHSRP, page 40-9
•Configuring HSRP Authentication and Timers, page 40-9
•Enabling HSRP Support for ICMP Redirect Messages, page 40-11
•Configuring HSRP Groups and Clustering, page 40-11
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