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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 23 Configuring HSRP
Configuring HSRP
Figure 23-1 Typical HSRP Configuration
Configuring HSRP
These sections include HSRP configuration information:
• Default HSRP Configuration, page 23-4
• Enabling HSRP, page 23-4
• Configuring HSRP Group Attributes, page 23-6
• Configuring HSRP Groups and Clustering, page 23-9
Note If HSRP is enabled, the switch can recognize 16 additional MAC addresses, each associated with a
set of VLANs or routing interfaces.
In the following procedures, the specified interface must be one of these Layer 3 interfaces:
• Routed port: a physical port configured as a Layer 3 port by entering the no switchport interface
configuration command.
• SVI: a VLAN interface created by using the interface vlan vlan_id global configuration command
and by default a Layer 3 interface.
Si Si Si
Host B
172.20.130.5
172.20.128.32
Host A
172.20.128.55
172.20.128.1 172.20.128.3 172.20.128.2
Virtual
router
Active
router
Standby
router
Router A Router B
Stacked
Catalyst 3550 or
2900XL/3500XL
switches
Stacked
Catalyst 3550 or
2900XL/3500XL
switches
46650
Host C
Catalyst 3550 switches
with enhanced multilayer
software images
