Alcatel-Lucent 7450 ESS Series, Руководство по настройке

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VRRP
7450 ESS OS Router Configuration Guide Page 259
VRRP Priority Control Policy Delta In-Use Priority Limit
A VRRP priority control policy enforces an overall minimum value that the policy can inflict on
the VRRP virtual router instance base priority. This value provides a lower limit to the delta
priority events manipulation of the base priority.
A delta priority event is a conditional event defined in the priority control policy that subtracts a
given amount from the current, in-use priority for all VRRP virtual router instances to which the
policy is applied. Multiple delta priority events can apply simultaneously, creating a dynamic
priority value. The base priority for the instance, less the sum of the delta values derives the actual
priority value in-use.
An explicit priority event is a conditional event defined in the priority control policy that explicitly
defines the in-use priority for the virtual router instance. The explicitly defined values are not
affected by the delta in-use priority limit. When multiple explicit priority events happen
simultaneously, the lowest value is used for the in-use priority. The configured base priority is not
a factor in explicit priority overrides of the in-use priority.
The allowed range of the Delta In-Use Priority Limit is 1 to 254. The default is 1, which prevents
the delta priority events from operationally disabling the virtual router instance.