IES Service Configuration Commands
7750 SR OS Services Guide Page 1043
from the system.
Default None
Parameters vrrp-policy-id — The vrrp-policy-id parameter associated the corresponding VRRP priority control
policy-id with the virtual router instance. The vrrp-policy-id must already exist in the system for
the policy command to be successful.
Values 1 to 9999
preempt
Syntax preempt
no preempt
Context config>service>ies>if>vrrp
Description The preempt command provides the ability of overriding an existing non-owner master to the virtual
router instance. Enabling preempt mode is almost required 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:
• 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
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.
Default preempt
priority
Syntax priority base-priority
no priority
Context config>service>ies>if>vrrp
Description The priority command provides the ability to configure a specific priority value to the virtual router
instance. In conjunction with an optional policy command, the base-priority is used to derive the in-
use priority of the virtual router instance.
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