3Com 10014299 manual Add Virtual IP Address, Configure Router Priority in Standby Group

	Configuring VRRP 655
Table 704 Add Virtual IP Address
Operation	Command
Add Virtual IP Address	vrrp vrid virtual_router_id
	virtual-ip ip-address
Delete virtual IP address	undo vrrp vrid virtual_router_id
	virtual-ip [ ip-address]

The standby group numbers ranges from 1 to 255. The virtual IP address should be the address of the network segment where the interface resides. It can be an unused IP address in the network segment, or the router's own IP address. When the virtual IP address is the router’s own IP address, this router is called an IP address owner. When the first IP address is added to a standby group, the system establishes this standby group. Whenever this command is executed after that, the system only adds this address to the virtual IP address list of this standby group. One router interface can be added into 14 standby groups at the same time, while one standby group can configure up to 16 virtual IP addresses. Before performing other configurations for one standby group, this command must be used first to establish this standby group.

Multiple virtual IP addresses (multiple virtual routers) can be configured in one standby group. All the virtual addresses take effect at the same time, and the computers in the LAN can choose any of the virtual routers as their gateway. The undo vrrp virtual-ipform of the command can delete one existing standby group or delete one virtual IP address from the virtual address list on a standby group.

After the last virtual IP address has been deleted from the standby group, this standby group is also deleted. Then this standby group no longer exists on this interface and all the configurations of this standby group are no longer valid.

Configuring Router The status of each router in a standby group can be determined by its priority in Priority in a Standby VRRP. The router with the highest priority becomes the master. Those with the

Group same priority are judged by comparing the master IP addresses of their interfaces.

The range of priority is 0 to 255 (the bigger the number, the higher the priority) with 100 as the default. However the range to be configured is from 1 to 254. Priority 0 is reserved for special use by the system and 255 is reserved for the IP address owner.

Perform the following configuration in Ethernet interface view:

Table 705 Configure Router Priority in Standby Group

Operation	Command
Configure the priority of the standby	vrrp vrid virtual_router_id priority
group	priority
Restore the default value of the priority	undo vrrp vrid virtual_router_id
	priority

The priority for IP address owners cannot be configured and it always remains 255.