186 CHAPTER 20: VRRP CONFIGURATION GUIDE
■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 Configuration
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.
Network Diagram Figure50 Network diagram for VRRP
Networking and
Configuration
Requirements
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.
Applicable Products
Configuration Procedure ■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
Product series Software version Hardware version
Switch 5500 Release V03.02.04 All versions
Switch 5500G Release V03.02.04 All versions