This task is performed on any device that is designated as a backup VRRP device. For each VRRP virtual routing instance, there is one master device and all other devices are backups. For example, Router 2 in
FigureĀ 33 is assigned as a backup device. Repeat this task for all devices that are to be designated as backup devices.
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On the device designated as a backup VRRP device, from privileged EXEC mode, enter global configuration mode by issuing the
configure terminal command.
device# configure terminal
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Globally enable VRRP.
device(config)# router vrrp
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Configure the Ethernet interface link.
device(config)# interface ethernet 1/1/5
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Configure the IP address of the interface for Router 2. All devices configured for the same virtual router ID (VRID) must be on the same subnet.
device(config-if-e1000-1/1/5)# ip address 10.53.5.3/24
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Assign Router 2 to VRID 1, the same VRID as Router 1.
device(config-if-e1000-1/1/5)# ip vrrp vrid 1
NOTE
You can assign a VRID number in the range of 1 through 255.
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Designate this router as a backup VRRP device.
device(config-if-e1000-1/1/5-vrid-1)# backup priority 110
While configuring a backup device, you can set a priority that is used when a master VRRP device goes offline. The backup device with the highest priority will assume the role of master device.
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Configure the VRRP version.
device(config-if-e1000-1/1/5-vrid-1)# version 2
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Configure the number of seconds between hello messages.
device(config-if-e1000-1/1/5-vrid-1)# hello-interval 10
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By default, backup VRRP devices do not send hello messages to advertise themselves to the master. Use the following command to enable a backup router to send hello messages to the master VRRP device.
device(config-if-e1000-1/1/5-vrid-1)# advertise backup
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Configure the IP address of the VRID.
device(config-if-e1000-1/1/5-vrid-1)# ip-address 10.53.5.1
The VRID IP address is the same virtual IP address you used for Router 1.
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Enable the VRRP session.
device(config-if-e1000-1/1/5-vrid-1)# activate
VRRP router 1 for this interface is activating
The following example configures a VRRP backup device.
device# configure terminal
device(config)# router vrrp
device(config)# interface ethernet 1/1/5
device(config-if-e1000-1/1/5)# ip address 10.53.5.3/24
device(config-if-e1000-1/1/5)# ip vrrp vrid 1
device(config-if-e1000-1/1/5-vrid-1)# backup priority 110
device(config-if-e1000-1/1/5-vrid-1)# version 2
device(config-if-e1000-1/1/5-vrid-1)# hello-interval 10
device(config-if-e1000-1/1/5-vrid-1)# advertise backup
device(config-if-e1000-1/1/5-vrid-1)# ip-address 10.53.5.1
device(config-if-e1000-1/1/5-vrid-1)# activate
VRRP router 1 for this interface is activating