Cisco IPv6 Training Using the “standby ipv6” Command
The “standby ipv6” command
By Charles Ross CCNP #CSCO10444244
Well, in this week’s article, I’m going to continue my discussion about the Hot Standby Router Protocol (HSRP) in an IPv6 environment; by explaining the Cisco IOS interface configuration mode command named “standby ipv6”.
Network administrators (like you) use the “standby ipv6” interface configuration mode command to active the Hot Standby Router Protocol (HSRP) on a Cisco router’s interface.
Below is the correct syntax and example of using the command:
Syntax: standby [group-number] ipv6 [link-local-address | autoconfig]
The (Optional) group-number argument portion of the command; is used to set the HSRP group number on the interface. (By default the group number is 0)
The “optional” link-local-address argument portion of the command; is used to set the Link-local address of the Hot Standby router interface.
And, the (Optional) autoconfig keyword portion of the command; indicates that a link-local address will be generated automatically from the link-local prefix and a modified EUI-64 format interface identifier; because, if you don’t use the “autoconfig” keyword with the standby ipv6 command the EUI-64 interface identifier will be created from the relevant HSRP virtual MAC address.
Example:
router>enable
router#configure terminal
router(config)#interface fastethernet 0/0
router(config-if)#standby 1 ipv6
router(config-if)#end
router#copy run start
In the above example, the router’s fastethernet 0/0 interface is being activated for HSRP group 1 and the IPv6 address used by the Hot Standby group will be learned using HSRP.
If you need to disable HSRP on an interface, type the word “no” in front of the command like you see below:
router(config-if)#no standby ipv6
And, if you plan on using the command in an IPv6 environment; make sure your Cisco IOS routers are running 12.4(4)T or higher.
I hope this article was very informative and helped you quickly understand the usage of the “standby ipv6” interface configuration command. If you need to learn more; I suggest you visit my website, were you’ll find the latest information regarding Cisco IPv6 Design and Implementation Techniques.
To your success,
Charles Ross
CCNP #CSCO10444244