Suppressing default interface-level RA messages on an IPv6 VRRP or
VRRP-E interface
You should have a valid IPv6 VRRP or VRRP-E congured on the interface.
By default, all IPv6-enabled interfaces send IPv6 Router Advertisement (RA) messages. If you congure an IPv6 VRRP/VRRP-E
instance on an interface, the VRRP or VRRP-E instance also sends its IPv6 RA messages for the virtual IPv6 address on the same
interface with the same source address. An IPv6 host cannot identify the valid IPv6 address for this router interface because of these two
dierent IPv6 RA messages with the same source address from the same IPv6 router interface. To avoid this, you can disable the default
interface-level IPv6 RA messages on an interface congured with IPv6 VRRP or VRRP-E.
To disable the default IPv6 RA messages and allow the interface to send only IPv6 VRRP or VRRP-E RA messages, use the
ipv6 nd skip-interface-ra command in interface conguration mode.
The following example shows suppression of the default interface-level IPv6 RA messages on an Ethernet interface 1/1/7 that has IPv6
VRRP or VRRP-E congured on it.
Brocade(config)# interface ethernet 1/1/7
Brocade(config-if-e1000-1/1/7)# ipv6 address 2002:AB3::2/64
Brocade(config-if-e1000-1/1/7)# ipv6 nd skip-interface-ra
Forcing a Master router to abdicate to a Backup
router
NOTE
Forcing a Master router to abdicate to a Backup router is not supported for IPv6 VRRP, IPv4 VRRP-E, and IPv6 VRRP-E. It is
only supported for IPv4 VRRP.
You can force a VRRP Master to abdicate (give away control) of a VRID to a Backup router by temporarily changing the Master priority to
a value less than that of the Backup router.
The VRRP Owner always has priority 255. You can use this feature to temporarily change the Owner priority to a value from 1 through
254.
NOTE
When you change the VRRP Owner priority, the change takes eect only for the current power cycle. The change is not saved
to the startup-cong le when you save the conguration and is not retained across a reload or reboot. Following a reload or
reboot, the VRRP Owner again has priority 255.
To change the Master priority, enter commands such as the following.
device(config)# interface ethernet 1/1/6
device(config-if-1/1/6)# ip vrrp vrid 1
device(config-if-1/1/6-vrid-1)# owner priority 99
Syntax: [no] owner priority num
The num variable
species the new priority and can be a number from 1 through 254.
When the command is enabled, the software changes the priority of the Master to the specied priority. If the new priority is lower than at
least one Backup priority for the same VRID, the Backup router takes over and becomes the new Master until the next software reload or
system reset.
Forcing a Master router to abdicate to a Backup router
FastIron Ethernet Switch Layer 3 Routing
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