Configuring The Asymmetric Hold Time For Vrrp Routers - Juniper EX9200 Features Manual

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Configuring the Asymmetric Hold Time for VRRP Routers

Example: Configuring
Asymmetric Hold Time
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Copyright © 2017, Juniper Networks, Inc.
[edit logical-systems logical-system-name interfaces interface-name unit
logical-unit-number family (Inet | inet6) address address (vrrp-group | vrrp-inet6-group)
group-id preempt]
Configuring the Advertisement Interval for the VRRP Master Router on page 135
Configuring a Backup Router to Preempt the VRRP Master Router on page 138
Configuring the Asymmetric Hold Time for VRRP Routers on page 139
Configuring VRRP on page 150
In Junos OS Release 9.5 and later, the
hierarchy level enables you to configure a VRRP master router to switch
protocols vrrp]
over to the backup router immediately—that is, without waiting for the priority hold time
to expire—when a tracked interface or route goes down or when the bandwidth of a
tracked interface decreases. Such events can cause an immediate reduction in the priority
based on the configured priority cost for the event, and trigger a mastership election.
However, when the tracked route or interface comes up again, or when the bandwidth
for a tracked interface increases, the backup (original master) router waits for the hold
time to expire before it updates the priority and initiates the switchover if the priority is
higher than the priority for the VRRP master (original backup) router.
If the
asymmetric-hold-time
hold time to expire before it initiates a switchover when a tracked route goes down.
[edit]
user@host# set protocols vrrp asymmetric-hold-time
[edit]
user@host# show protocols vrrp
asymmetric-hold-time;
Configuring the Advertisement Interval for the VRRP Master Router on page 135
Configuring a Backup Router to Preempt the VRRP Master Router on page 138
Modifying the Preemption Hold-Time Value for the VRRP Master Router on page 138
Configuring VRRP on page 150
asymmetric-hold-time
statement is not configured, the VRRP master waits for the
Chapter 14: Configuring VRRP
statement at the [edit
139