Reference Guide

Virtual Router Redundancy Protocol (VRRP) | 757
Figure 44-2. Command Example: vrrp-group
Figure 44-3. Command Example Display: show config for the Interface
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.
E-Series supports an unlimited total number of VRRP Groups on the router while supporting up to 255
VRRP groups on a single interface (Table 44-1).
C-Series supports a total of 128 VRRP groups on the switch with varying number of maximum VRRP
groups per interface (Table 44-1).
S-Series 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
(Table 44-1).
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 FTOS allows the same).
FTOS(conf)#int gi 1/1
FTOS(conf-if-gi-1/1)#vrrp-group 111
FTOS(conf-if-gi-1/1-vrid-111)#
Virtual Router ID
and VRRP Group identifier
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)#
Note that the interface
has an IP Address and is enabled