Assign Virtual Ip Addresses - Dell Force10 Z9000 Configuration Manual

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
C-Series supports a total of 128 VRRP groups on the switch with varying number of maximum VRRP
groups per interface
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 49-1).
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 Force10 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).
• 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.
• On an S4810 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
command.
Configure a Virtual IP address with these commands in the following sequence in the INTERFACE mode.
Step Task
1 Configure a VRRP group.
| Virtual Router Redundancy Protocol (VRRP)
954
(Table 49-1).
(Table 49-1).
Command Syntax
vrrp-group vrrp-id
VRID Range: 1-255
mac-address-table station-move refresh-arp
Command Mode
INTERFACE