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C

HAPTER

 20: VRRP C

ONFIGURATION

 G

UIDE

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If both switches in the preemptive mode and switches in the non-preemptive 
mode exist in a VRRP group, the working mode of the VRRP group conforms to 
that of the master. For example, if the master works in the preemptive mode, 
when the master fails, the VRRP group will elect a new master through 
preemption although there are switches working in the non-preemptive mode.

Multiple VRRP groups can implement the link backup and load sharing functions, 
which can avoid communication interruption resulting from switch failure or traffic 
overburden on a link.

Figure 50   Network diagram for VRRP

 

A switch can backup multiple VRRP groups.

Multiple-VRRP group configuration can implement load sharing. For example, 
Switch A acts as the master of VRRP group 1 and a backup of VRRP group 2. 
Switch B acts as the master of VRRP group 2 and a backup of VRRP group 1. Some 
hosts in the network take VRRP group 1 as the gateway, while the others take 
VRRP group 2 as the gateway. In this way, both load sharing and mutual backup 
are implemented.

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Configure Switch A.

# Configure VLAN 2.

Switch A

Host C

Host B

Switch B

Vlan -int3

10 .100 .10.2/24

Vlan -int2

202 .38 .160 .1/24

VLAN -int2

202.38.160.2/24

202 .38.160.3/24

10.2.3.1/24

Host A

202 .38.160.4/24

Internet

                                     Backup group 

1

Virtual IP address 

202.38.160.111 /24

Backup group 2
Virtual IP address 202 .38 .160 .112 /24

Switch 5500

Release V03.02.04 

All versions 

Switch 5500G

Release V03.02.04 

All versions