Alcatel-Lucent 7750 SR OS - Manual (Page 242)

Configuration Commands
Page 242 7750 SR OS Router Configuration Guide
Priority Policy Commands
delta-in-use-limit
Syntax delta-in-use-limit in-use-priority-limit
no delta-in-use-limit
Context config>vrrp>policy vrrp-policy-id
Description This command sets a lower limit on the virtual router in-use priority that can be derived from the
delta priority control events.
Each vrrp-priority-id places limits on the delta priority control events to define the in-use priority of
the virtual router instance. Setting this limit prevents the sum of the delta priority events from
lowering the in-use priority value of the associated virtual router instances below the configured
value.
The limit has no effect on explicit priority control events. Explicit priority control events are
controlled by setting the in-use priority to any value between 1 and 254.
Only non-owner virtual router instances can be associated with VRRP priority control policies and
their priority control events.
Once the total sum of all delta events is calculated and subtracted from the base priority of the virtual
router instance, the result is compared to the delta-in-use-limit value. If the result is less than the
limit, the delta-in-use-limit value is used as the virtual router in-use priority value. If an explicit
priority control event overrides the delta priority control events, the delta-in-use-limit has no effect.
Setting the limit to a higher value than the default of 1 limits the effect of the delta priority control
events on the virtual router instance base priority value. This allows for multiple priority control
events while minimizing the overall effect on the in-use priority.
Changing the in-use-priority-limit causes an immediate re-evaluation of the in-use priority values for
all virtual router instances associated with this vrrp-policy-id based on the current sum of all active
delta control policy events.
The no form of the command reverts to the default value.
Default 1 - The lower limit of 1 for the in-use priority, as modified, by delta priorty control events.
Parameters in-use-priority-limit — The lower limit of the in-use priority base, as modified by priority control
policies. The in-use-priority-limit has the same range as the non-owner virtual router instance
base-priority parameter. If the result of the total delta priority control events minus the virtual
router instances base-priority, is less than the in-use-priority-limit, the in-use-priority-limit value
is used as the virtual router instances in-use priority value.
Setting the in-use-priority-limit to a value equal to or larger than the virtual router instance base-
priority prevents the delta priority control events from having any effect on the virtual router
instance in-use priority value.
Values 1 — 254