3com 5500-ei pwr Installation Instruction

 

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[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 

# Configure that the virtual router can be pinged through. 

[LSW-B] vrrp ping-enable 

# Create a VRRP group. 

[LSW-B] interface Vlan-interface 2 

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

# Configure the authentication key for the VRRP group. 

[LSW-B-Vlan-interface2] vrrp vrid 1 authentication-mode md5 abc123 

# Configure the master to send VRRP packets every 5 seconds. 

[LSW-B-Vlan-interface2] vrrp vrid 1 timer advertise 5 

Normally, Switch A functions as the gateway, but when VLAN-interface 3 on Switch A goes 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-interface 3 recovers, switch A will resume its gateway function as the master. 

A switch can function as a backup of multiple VRRP groups. 

Multiple-VRRP group configuration can implement load balancing. For example, Switch A acts as the 

master of VRRP group 1 and a backup in VRRP group 2. Similarly, Switch B acts as the master of VRRP 

group 2 and a backup in VRRP group 1. Some hosts in the network take virtual router 1 as the gateway, 

while others take virtual router 2 as the gateway. In this way, both load balancing and mutual backup are 

implemented.