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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring IPv6 Unicast Routing
Configuring IPv6
For configuration guidelines when configuring HSRP for IPv6 with HSRPv1 and HSRPv2, see the
“Default HSRP Configuration” section on page 1-5 and the “Troubleshooting HSRP for Mixed Stacks
of Catalyst 3750-X, 3750-E and 3750 Switches” section on page 1-12.
For more information about HSRP for IPv6 and HSRPv2, see the Chapter 1, “Configuring HSRP and
VRRP.”
Note Before configuring an HSRP for IPv6 group, you must enable the forwarding of IPv6 packets by using
the ipv6 unicast-routing global configuration command and enable IPv6 on the interface on which you
will configure an HSRP for IPv6 group.
Enabling HSRP Version 2
Beginning in privileged EXEC mode, follow these steps to enable HSRP version 2 on a Layer 3 interface.
Enabling an HSRP Group for IPv6
Beginning in privileged EXEC mode, follow these steps to create or enable HSRP for IPv6 on a Layer 3
interface.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and enter the
Layer 3 interface on which you want to specify the
standby version.
Step 3
standby version {1 | 2}Enter 2 to change the HSRP version. The default is 1.
Step 4
end Return to privileged EXEC mode.
Step 5
show standby Verify the configuration.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and enter the Layer 3
interface on which you want to enable HSRP for IPv6.
Step 3
standby [group-number] ipv6 {link-local-address
| autoconfig}
Create (or enable) the HSRP for IPv6 group.
• (Optional) group-number—The group number on the
interface for which HSRP is being enabled. The range is 0
to 4095. The default is 0. If there is only one HSRP group,
you do not need to enter a group number.
• Enter the link-local address of the Hot Standby router
interface, or enable the link-local address to be generated
automatically from the link-local prefix and a modified
EUI-64 format interface identifier, where the EUI-64
interface identifier is created from the relevant HSRP
virtual MAC address.
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