Dell Force10 Z9000 FTOS Configuration Guide for Z9000 System - Page 954

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