You can include these statements at the following hierarchy level:
•
[edit interfaces interface-name unit logical-unit-number family inet address address
vrrp-group group-id]
The route prefix specified is the route to be tracked for the VRRP group. The priority hold
time is the minimum length of time that must elapse between dynamic priority changes.
A route tracking event, such as adding a route to or removing a route from the routing
table, might trigger one or more of the following:
•
The first tracking event initiates the priority hold timer, and also initializes the pending
priority based on the current priority and the priority cost. However, the current priority
remains unchanged.
•
A tracking event or a manual configuration change that occurs while the priority hold
timer is on triggers a pending priority update. However, the current priority remains
unchanged.
When the priority hold time expires, the current priority inherits the value from the pending
priority, and the pending priority ceases. This ensures that Junos OS does not initiate
mastership elections every time a tracked route flaps.
NOTE: If you have configured asymmetric-hold-time, VRRP does not wait for
the priority hold time to expire before initiating mastership elections if a
tracked route is removed from the routing table. For more information about
asymmetric-hold-time, see Configuring the Asymmetric Hold Time for VRRP
Routers.
The routing instance is the routing instance in which the route is to be tracked. If the route
is in the default, or global, routing instance, specify the instance name as default.
NOTE: Tracking a route that belongs to a routing instance from a different
logical system is not supported.
The priority cost is the value to be subtracted from the configured VRRP priority when
the tracked route goes down, forcing a new master router election. The value can be
from 1 through 254. The sum of the costs for all tracked logical interfaces or routes must
be less than or equal to the configured priority of the VRRP group.
Related
Documentation
Understanding VRRP on ACX Series Routers on page 651•
• Configuring Basic VRRP Support on page 653
• Configuring the Advertisement Interval for the VRRP Master Router on page 655
• Configuring a Backup Router to Preempt the Master Router on page 656
• Modifying the Preemption Hold-Time Value on page 657
• Configuring Asymmetric Hold Time for VRRP Routers on page 657
Copyright © 2017, Juniper Networks, Inc.662
ACX Series Universal Access Router Configuration Guide
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