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Load sharing – H3C Technologies H3C MSR 5600 User Manual

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Figure 3 VRRP in master/backup mode

Assume that Router A is acting as the master to forward packets to external networks, and Router B and

Router C are backups in listening state. When Router A fails, Router B and Router C elect a new master

to forward packets for hosts on the subnet.

Load sharing

A router can join multiple VRRP groups and has different priorities in different VRRP groups, and it can act

as the master in one VRRP group and a backup in another.
In load sharing mode, multiple VRRP groups provide gateway services. This mode requires at least two

VRRP groups, and each group has one master and multiple backups. The master roles in the VRRP groups
are assumed by different routers, as shown in

Figure 4

.

Figure 4 Load sharing of VRRP

A router can be in multiple VRRP groups and have a different priority in each group.
As shown in

Figure 4

, the following VRRP groups are present:

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