3Com 4210, 5500G, 4200G manual # Create Vrrp group, # Set the interface to be tracked

190CHAPTER 20: VRRP CONFIGURATION GUIDE

#Create VRRP group 1.

[LSW-A] interface Vlan-interface 2

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

# Set the priority of Switch A in VRRP group 1 to 110.

[LSW-A-Vlan-interface2] vrrp vrid 1 priority 110

# Set the interface to be tracked.

[LSW-A-Vlan-interface2] vrrp vrid 1 track interface Vlan-interface 3

reduced 30

■Configure Switch B.

# Configure VLAN 2.

<LSW-B> system-view [LSW-B] vlan 2

[LSW-B-vlan2] port Ethernet1/0/5

[LSW-B-vlan2] quit

[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 a VRRP group to respond to ping operations destined for its virtual IP address.

[LSW-B] vrrp ping-enable

# Create VRRP group 1.

[LSW-B] interface Vlan-interface 2

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

Normally, Switch A acts as the gateway. When VLAN-interface 3 on Switch A becomes unavailable, the priority of Switch A decreases by 30, making the priority of Switch A lower than that of Switch B. Therefore, Switch B preempts and becomes the master to act as the gateway.

When VLAN-interface 3 resumes to work, Switch A becomes the master again to act as the gateway.

Complete Configuration ■ Configuration on Switch A

#

vrrp ping-enable

#

interface Vlan-interface2

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

vrrp vrid 1 track Vlan-interface1 reduced 30

#

interface Ethernet1/0/6