Reference Guide

• Delete a VRRP group.
INTERFACE mode
no vrrp-group vrid
Example of Configuring VRRP
FTOS(conf)#int gi 1/1
FTOS(conf-if-gi-1/1)#vrrp-group 111
FTOS(conf-if-gi-1/1-vrid-111)#
Example of Verifying the VRRP Configuration
FTOS(conf-if-gi-1/1)#show conf
!
interface GigabitEthernet 1/1
ip address 10.10.10.1/24
!
vrrp-group 111
no shutdown
FTOS(conf-if-gi-1/1)#
Assign 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.
S4820T supports a total of 120 VRRP groups on a switch with FTOS or a total of 20 VRRP groups when using SFTOS. The
S-Series supports varying number of maximum VRRP groups per interface.
For more information, refer to VRRP Implementation.
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 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 FTOS 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 an S4820T 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
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