Reference Guide

Virtual Router Redundancy Protocol (VRRP) | 991
Assigning Virtual IP addresses
Virtual routers contain virtual IP addresses configured for that VRRP Group (VRID). A VRRP group does
not transmit VRRP packets until you assign the Virtual IP address to the VRRP group.
The S5000 supports a total of 120 VRRP groups on a switch with Dell networking OS or a total of 20
VRRP groups when using SFTOS.
To activate a VRRP Group on an interface (so that VRRP group starts transmitting VRRP packets),
configure at least one Virtual IP address in a VRRP group. The Virtual IP address is the IP address of the
Virtual Router and does not require the IP address mask.
You can configure up to 12 Virtual IP addresses on a single VRRP Group (VRID).
The following rules apply to virtual IP addresses:
• The virtual IP addresses must be in the same subnet as the primary or secondary IP addresses
configured on the interface. Though a single VRRP group can contain virtual IP addresses belonging
to multiple IP subnets configured on the interface, Dell Networking recommends you configure virtual
IP addresses belonging to the same IP subnet for any one VRRP group.
For example, an interface (on which VRRP is to be enabled) 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 multiple VRRP groups are configured on an interface, only one of the VRRP Groups can contain the
interface primary or secondary IP address.
Configure a Virtual IP address with these commands in the following sequence in the INTERFACE mode.
Figure 56-4. Command Example: virtual-address
Step Task Command Syntax Command Mode
1 Configure a VRRP group. vrrp-group vrrp-id
VRID Range: 1-255
INTERFACE
2 Configure virtual IP addresses
for this VRID.
virtual-address ip-address1 [...ip-address12]
Range: up to 12 addresses
INTERFACE -VRID
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
Dell(conf-if-te-1/1-vrid-111)#