VRRP Command Reference
252 7705 SAR OS Router Configuration Guide
The no form of the command is used to remove the specific ip-prefix/mask monitoring event. The
event can be removed at any time. When the event is removed, the in-use priority of all associated
virtual router instances must be re-evaluated. The event hold-set timer has no effect on the removal
procedure.
Default no route-unknown
Parameters ip-prefix — specifies the IP prefix address to be monitored by the route unknown priority control
event, in dotted-decimal notation
Values 0.0.0.0 to 255.255.255.255
mask — specifies the subnet mask length associated with the IP prefix defining the route prefix to
be monitored by the route unknown priority control event
Values 0 to 32
hold-clear
Syntax hold-clear seconds
no hold-clear
Context config>vrrp>policy>priority-event>host-unreachable
config>vrrp>policy>priority-event>port-down
config>vrrp>policy>priority-event>route-unknown
Description This command configures the hold-clear time for the event. The hold-clear time is used to prevent
black hole conditions if a virtual router instance advertises itself as a master before other conditions
associated with the cleared event have had a chance to enter a forwarding state.
Default no hold-clear
Parameters seconds — specifies the amount of time in seconds by which the effect of a cleared event on the
associated virtual router instance is delayed
Values 0 to 86400
hold-set
Syntax hold-set seconds
no hold-set
Context config>vrrp>policy>priority-event>host-unreachable
config>vrrp>policy>priority-event>port-down
config>vrrp>policy>priority-event>route-unknown
Description This command specifies the amount of time that must pass before the set state for a VRRP priority
control event can transition to the cleared state to dampen flapping events. A flapping event continually
transitions between clear and set.
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