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Virtual Router Redundancy Protocol (VRRP) | 1133
• If the virtual IP address and the interface’s primary/secondary IP address are the same, the priority on
that VRRP group is automatically set to 255. The interface then becomes the MASTER/OWNER
router of the VRRP group and the interface’s physical MAC address is changed to that of the owner
VRRP group’s MAC address. (You can also configure a priority for the group even if the group is
owned. The configured priority is saved but only applied as the run-time priority when the last virtual
address is removed from the group.)
• If multiple VRRP groups are configured on an interface, only one of the VRRP groups can have the
primary or secondary IP address of the interface.
Configure a Virtual IP address with these commands in the following sequence in the INTERFACE mode.
Figure 58-4. Command Example: virtual-address
Figure 58-5. Command Example Display: show config for the Interface
Step Task Command Syntax Command Mode
1 Configure an IPv4 or IPv6
VRRP group.
vrrp-group vrid | vrrp-ipv6-group vrid
VRID range (C-Series and S-Series): 1-255
VRID range (E-Series): 1-255 when VRF
microcode is not loaded and 1-15 when VRF
microcode is loaded
INTERFACE
2 Configure virtual IP addresses
for this VRID.
virtual-address ip-address1
[...ip-address12]
Range: Up to 12 virtual IP addresses
INTERFACE -VRID
Note: After you enter the vrrp-group or vrrp-ipv6-group command, a message similar to the following is
displayed to confirm the VRID number used with the VRRP group and displayed in show vrrp command
output: The VRID used by the VRRP group is 41.
For information on how the VRID number changes when VRF microcode is loaded, see the Note in VRRP
on a VRF Interface on page 1142.
FTOS(conf-if-gi-1/1-vrid-111)#virtual-address 10.10.10.1
FTOS(conf-if-gi-1/1-vrid-111)#virtual-address 10.10.10.2
FTOS(conf-if-gi-1/1-vrid-111)#virtual-address 10.10.10.3
FTOS(conf-if-gi-1/1)#show conf
!
interface GigabitEthernet 1/1
ip address 10.10.10.1/24
!
vrrp-group 111
priority 255
virtual-address 10.10.10.1
virtual-address 10.10.10.2
virtual-address 10.10.10.3
!
vrrp-group 222
no shutdown
Note that the Primary IP address
and the Virtual IP addresses are
on the same subnet