3Com 3500 manual Ip vrrp define, Defines a virtual router on the system

492CHAPTER 17: VIRTUAL ROUTER REDUNDANCY (VRRP)

ip vrrp define

✓3500

✓9000

9400

3900

9300

Primary Routers

Backup Routers

Address Mode

For CoreBuilder 9000: Applies to Layer 3 switching modules only.

Defines a virtual router on the system.

Valid Minimum Abbreviation

ip v def

Important Considerations

■Authentication passwords can be up to eight alphanumeric characters.

■You can define one Primary router per VLAN.

■Primary routers own the IP addresses that you associate with a virtual router.

■When you define a Primary virtual router, the possible VLANs that you can select are the IP VLANs on the router that have no virtual routers configured.

■The virtual router ID (VRID) must be unique across all locally attached LAN segments and unique for the local router.

■When you define a Primary virtual router, you cannot use the VRID of a virtual router that is already defined on the system or the VRID of a neighboring VRRP router.

■Backup routers back up the primary router of a specified virtual router and assume Master state responsibilities for the virtual router should the primary router fail.

■When you define a Backup virtual router, you cannot use the VRID of a primary router that is defined on the system. You cannot define a Primary and Backup VRRP router for the same virtual router on the same routing device.

■In auto-learnmode, systems learn the IP addresses to associate with the specified VRID.

■In IP address mode, the system prompts you to select the interface index from a list.

■After a reboot, the address learning process restarts for each virtual router in auto-learn address mode.

■When you define a Primary virtual router, selecting auto-learnas the address mode automatically adds all IP addresses that are associated with the selected VLAN to the primary virtual router.