Dell S4820T, Configuration Manual

Page: 1121 / 1178

to multiple IP subnets configured on the interface, Dell Networking recommends configuring virtual
IP addresses belonging to the same IP subnet for any one VRRP group.
– For example, an interface (on which you enable VRRP) contains a primary IP address of 50.1.1.1/24
and a secondary IP address of 60.1.1.1/24. The VRRP group (VRID 1) must contain virtual addresses
belonging to either subnet 50.1.1.0/24 or subnet 60.1.1.0/24, but not from both subnets (though
Dell Networking OS allows the same).
• If the virtual IP address and the interface’s primary/secondary IP address are the same, the priority on
that VRRP group MUST be set to 255. The interface then becomes the 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.
• If you configure multiple VRRP groups on an interface, only one of the VRRP Groups can contain the
interface primary or secondary IP address.
• On a stack system, if a force failover is performed on a master stack unit, the VRRP virtual addresses
are disabled. To re-enable VRRP, execute the
mac-address-table station-move refresh-arp
command.
Configuring a Virtual IP Address
To configure a virtual IP address, use the following commands.
1. Configure a VRRP group.
INTERFACE mode
vrrp-group vrrp-id
The VRID range is from 1 to 255.
2. Configure virtual IP addresses for this VRID.
INTERFACE -VRID mode
virtual-address ip-address1 [ ...ip-address12 ]
The range is up to 12 addresses.
Examples of the Configuring and Verifying a Virtual IP Address
The following example shows how to configure a virtual IP address.
Dell(conf-if-te-1/1-vrid-111)#virtual-address 10.10.10.1
Dell(conf-if-te-1/1-vrid-111)#virtual-address 10.10.10.2
Dell(conf-if-te-1/1-vrid-111)#virtual-address 10.10.10.3
The following example shows how to verify a virtual IP address configuration.
NOTE: In the following example, the primary IP address and the virtual IP addresses are on the same
subnet.
Dell(conf-if-te-1/1)#show conf
!
interface TenGigabitEthernet 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
!
Virtual Router Redundancy Protocol (VRRP)
1121