Configuring A Backup Router To Preempt The Vrrp Master Router; Modifying The Preemption Hold-Time Value For The Vrrp Master Router - Juniper EX9200 Features Manual

High Availability Feature Guide for EX9200 Switches

Configuring a Backup Router to Preempt the VRRP Master Router

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Modifying the Preemption Hold-Time Value for the VRRP Master Router

138
By default, a higher-priority backup router preempts a lower-priority master router. To
explicitly enable the master router to be preempted, include the
preempt;
You can include this statement at the following hierarchy levels:
[edit interfaces interface-name unit logical-unit-number family (inet | inet6) address
address (vrrp-group | vrrp-inet6-group) group-id]
[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]
To prohibit a higher-priority backup router from preempting a lower-priority master router,
include the statement:
no-preempt
no-preempt;
Understanding VRRP on page 119
Configuring the Advertisement Interval for the VRRP Master Router on page 135
Modifying the Preemption Hold-Time Value for the VRRP Master Router on page 138
Configuring the Asymmetric Hold Time for VRRP Routers on page 139
Configuring VRRP on page 150
The hold time is the maximum number of seconds that can elapse before a higher-priority
backup router preempts the master router. You might want to configure a hold time so
that all Junos OS components converge before preemption.
By default, the hold-time value is 0 seconds. A value of 0 means that preemption can
occur immediately after the backup router comes online. Note that the hold time is
counted from the time the backup router comes online. The hold time is only valid when
the VRRP router is just coming online.
To modify the preemption hold-time value, include the
hold-time seconds;
The hold time can be from 0 through 3600 seconds.
You can include this statement at the following hierarchy levels:
[edit interfaces interface-name unit logical-unit-number family (inet | inet6) address
address (vrrp-group | vrrp-inet6-group) group-id preempt]
statement:
preempt
statement:
hold-time
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