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JUNOSe 11.1.x Service Availability Configuration Guide
Configuring VRRP
Configuring VRRP requires that you first configure an IP interface over which you
can configure VRRP and any VRID instances in which you want the VRRP routers to
participate. The following sections contain information for configuring the IP interface
for VRRP, any VRID instances for the VRRP routers, and steps for creating a basic
VRRP configuration.
Configuring the IP Interface
Before you configure VRRP, you must configure an IP interface and assign a primary
IP address and subnet mask. When the IP address belongs to the owner of the VRID,
you must associate the IP address with the VRID that you create.
To configure the IP interface for VRRP:
1.
2.
NOTE: We recommend that you complete all IP address configurations before you
configure VRRP. If for any reason the IP address information changes after you
configure VRRP, you must revise the associated IP addresses configured on the related
VRRP entries. If you specify auto addresses in the ip vrrp virtual-address command
along with using priority 255, you must disable and reenable the VRRP entry to
update the association list.
Creating VRIDs
A master or backup router running the VRRP protocol can participate in one or more
VRID instances. You can create a VRID instance in several ways:
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Configuring VRRP
Configure an IP interface.
host1(config)#interface fastEthernet 4/0
Assign an IP address and a subnet mask.
host1(config-if)#ip address 194.50.1.42 255.255.255.0
We recommend that you create and configure a VRID instance first, and enable
it last. For example:
host1(config-if)#ip vrrp 198
host1(config-if)#ip vrrp 198 priority 255
You can create and enable a VRID instance by using the ip vrrp vrid enable
command. For example:
host1(config-if)#ip vrrp 25 enable
You continue to configure the VRID by identifying the VRID each time you use
a VRRP command. For example:
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