Alcatel-Lucent 7750 SR Manual page 1348

Os services guide

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VPRN Service Configuration Commands

policy vrrp-policy-id

config>service>vprn>if>vrrp

config>service>vprn>if>ipv6>vrrp

This command associates a VRRP priority control policy with the virtual router instance (non-owner

context only).

vrrp-policy-id — Specifies a VRRP priority control policy.

config>service>vprn>interface

config>service>vprn>if>ipv6>vrrp

This command provides the ability of overriding an existing non-owner master to the virtual router

instance. Enabling preempt mode is recommended for proper operation of the base-priority and vrrp-

policy-id definitions on the virtual router instance. If the virtual router cannot preempt an existing

non-owner master, the affect of the dynamic changing of the in-use priority is greatly diminished.

The preempt command is only available in the non-owner vrrp virtual-router-id nodal context. The

owner may not be preempted due to the fact that the priority of non-owners can never be higher than

the owner. The owner will always preempt all other virtual routers when it is available.

Non-owner virtual router instances will only preempt when preempt is set and the current master has

an in-use message priority value less than the virtual router instances in-use priority.

A master non-owner virtual router will only allow itself to be preempted when the incoming VRRP

Advertisement message Priority field value is one of the following:

The no form of this command prevents a non-owner virtual router instance from preempting another,

less desirable virtual router. Use the preempt command to restore the default mode.

• Greater than the virtual router in-use priority value

• Equal to the in-use priority value and the source IP address (primary IP address) is greater than

the virtual router instance primary IP address

7750 SR OS Services Guide