3Com MSR 50 Series Configuration Manual page 1978

1978 C 107: VRRP C
HAPTER ONFIGURATION
Figure 587 VRRP in master/backup mode
Host A
Host B
Host C
At the beginning, Router A is the master and therefore can forward packets to
external networks, while Router B and Router C are backups and are thus in the
state of listening. If Router A fails, Router B and Router C will elect for the new
master. The new master takes over the forwarding task to provide services to hosts
on the LAN.
Load balancing
You can create more than one standby group on an interface of a router, allowing
the router to be the master of one standby group but a backup of another at the
same time.
In load balancing mode, multiple routers provide services at the same time. This
mode requires two or more standby groups, each of which includes a master and
one or more backups. The masters of the standby groups can be assumed by
different routers, as shown in
Virtual IP address:
10.1.1.1/24
Router A
Master
10.1.1 .2/24
Router B
Backup
10.1.1 .3/24
Router C
Backup
10.1.1 .4/24
Figure 588.
Network