Configuring Multiple Standby Groups - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
In normal circumstances, Router A functions as the gateway. When interface Serial
2/0/0 on Router A becomes unavailable, the priority of Router A is reduced by 30, lower
than that of Router B. Router B then preempts Router A to provide the gateway service.
When interface Serial 2/0/0 on Router A recovers, the router resumes its gateway
function as the master.

3.4.3 Configuring Multiple Standby Groups

I. Network requirements
V 2.41 allows one router to join multiple standby groups.
You can implement load sharing by configuring multiple standby groups. For example,
Router A may join standby group 1 as the master and standby group 2 as the backup,
while Router B joins standby group 1 as the backup and standby group 2 as the master.
By using them to provide the gateway service to different hosts, you can achieve load
sharing while having the routers back up each other.
II. Network diagram
See Figure 3-3.
III. Configuration procedure
Configure Router A:
# Create standby group 1.
[3Com-Ethernet1/0/0] vrrp vrid 1 virtual-ip 202.38.160.111
# Set the priority of the standby group.
[3Com-Ethernet1/0/0] vrrp vrid 1 priority 120
# Create standby group 2.
[3Com-Ethernet1/0/0] vrrp vrid 2 virtual-ip 202.38.160.112
Configure Router B:
# Create standby group 1.
[3Com-Ethernet1/0/0] vrrp vrid 1 virtual-ip 202.38.160.111
# Create standby group 2.
[3Com-Ethernet1/0/0] vrrp vrid 2 virtual-ip 202.38.160.112
# Set the priority of standby group 2.
[3Com-Ethernet1/0/0] vrrp vrid 2 priority 120
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Chapter 3 VRRP Configurations