Configuring Inheritance For A Vrrp Group - Juniper EX9200 Features Manual

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Configuring Inheritance for a VRRP Group

Copyright © 2017, Juniper Networks, Inc.
The priority value zero (0) indicates that the current master router has stopped
participating in VRRP. Such a priority value is used to trigger one of the backup routers
to quickly transition to the master router without having to wait for the current master
to time out.
Release Description
15.1 Prior to Junos OS Release 15.1, an adjusted priority could not be zero.
Understanding VRRP on page 119
Configuring a Logical Interface to Be Tracked for a VRRP Group on page 141
Configuring VRRP Route Tracking on page 153
Configuring a Logical Interface to Be Tracked for a VRRP Group on page 141
Junos OS enables you to configure VRRP groups on the various subnets of a VLAN to
inherit the state and configuration of one of the groups, which is known as the active
VRRP group. When the vrrp-inherit-from
configuration, only the active VRRP group, from which the other VRRP groups are inheriting
the state, sends out frequent VRRP advertisements, and processes incoming VRRP
advertisements. The groups that are inheriting the state do not process any incoming
VRRP advertisement because the state is always inherited from the active VRRP group.
However, the groups that are inheriting the state do send out VRRP advertisements once
every 2 to 3 minutes to facilitate MAC address learning on the switches placed between
the VRRP routers.
If the vrrp-inherit-from statement is not configured, each of the VRRP master groups in
the various subnets on the VLAN sends out separate VRRP advertisements and adds to
the traffic on the VLAN.
To configure inheritance for a VRRP group, include the
the
[edit interfaces interface-name unit logical-unit-number family inet address address
hierarchy level.
vrrp-group group-id]
[edit interfaces interface-name unit logical-unit-number family inet address address
vrrp-group group-id]
vrrp-inherit-from vrrp-group;
When you configure a group to inherit a state from another group, the inheriting groups
and the active group must be on the same physical interface and logical system. However,
the groups do not need to necessarily be on the same routing instance (as was in Junos
OS releases earlier than 9.6), VLAN, or logical interface.
Chapter 14: Configuring VRRP
configuration statement is included in the
vrrp-inherit-from
statement at
145