3com 8807 User Guide

# Track an interface.

[LSW_A-vlan-interface2] vrrp vrid 1 track vlan-interface 3 reduced 30 

Configure switch B

# Configure VLAN2.

[LSW-B] vlan 2

 

[LSW-B-vlan2] interface vlan 2

 

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

 

[LSW-B-vlan-interface2] quit 

# Enable the function to ping the virtual IP address of virtual router.

[3ComLSW-B] vrrp ping-enable 

# Create a virtual router.

[LSW-B] interface vlan 2

 

[LSW_B-vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111 

# Set the authentication key for the virtual router.

[LSW_B-vlan-interface2] vrrp authentication-mode md5 switch 

# Set Master to send VRRP packets every 5 seconds.

[LSW_B-vlan-interface2] vrrp vrid 1 timer advertise 5 

Under normal conditions, switch A functions as the gateway, but when the 
interface vlan-interface 3 of switch A is down, its priority will be reduced by 30, 
lower than that of switch B so that switch B will preempt the Master for gateway 
services instead.

When vlan-interface3, the interface of switch A, recovers, this switch will resume 
its gateway function as the Master.

A Switch can function as the backup switch for many virtual routers.

Such a multi-backup configuration can implement load balancing. For example, 
switch A as the Master switch of virtual router 1 can share the responsibility of the 
backup switch for virtual router 2 and vice versa for switch B. Some hosts employ 
virtual router 1 as the gateway, while others employ virtual router 2 as the 
gateway. In this way, both load balancing and mutual backup are implemented.

Refer to Figure 158.

Configure switch A

# Configure VLAN2.