3Com 5500G, 4210, 4200G manual Configurations on Switch B

Single VRRP Group Configuration 185

[LSW-B] interface Vlan-interface 2

[LSW-B-Vlan-interface2] ip address 202.38.160.2 255.255.255.0

[LSW-B-Vlan-interface2] quit

#Enable the VRRP group to respond to ping operations destined for its virtual IP address.

[LSW-B] vrrp ping-enable

# Create a VRRP group.

[LSW-B] interface vlan 2

[LSW-B-Vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111

# Configure preemptive mode for the VRRP group.

[LSW-B-Vlan-interface2] vrrp vrid 1 preempt-mode

The default gateway of Host A is configured as 202.38.160.111.

Normally, Switch A functions as the gateway. When Switch A is turned off or fails,

Switch B functions as the gateway.

Because Switch A is configured to work in the preemptive mode, when Switch A resumes to work, it becomes the master again to function as the gateway.

Complete Configuration ■ Configurations on Switch A

#

vrrp ping-enable

#

interface Vlan-interface1

ip address 202.38.160.1 255.255.255.0 vrrp vrid 1 virtual-ip 202.38.160.111 vrrp vrid 1 priority 110

#

interface Ethernet1/0/6 port access vlan 2

#

■Configurations on Switch B

#

vrrp ping-enable

#

interface Vlan-interface1

ip address 202.38.160.2 255.255.255.0 vrrp vrid 1 virtual-ip 202.38.160.111

#

interface Ethernet1/0/5 port access vlan 2

#

Precautions ■ The Switch 5500 supports VRRP, while the Switch 4500 does not.

■For the IP address owner, its priority in the VRRP group is always 255.

■Do not configure multiple VRRP groups on the same VLAN interface. Otherwise, the VRRP function will be affected.