Troubleshooting Vrrp - 3Com 8807 Configuration Manual

664 C 53: VRRP C
HAPTER ONFIGURATION
[LSW-A] vlan 2
[LSW-A-vlan2] interface vlan 2
[LSW-A-vlan-interface2] ip address 202.38.160.1 255.255.255.0
# Create virtual router 1.
[LSW_A-vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111
# Set the priority for the virtual router.
[LSW_A-vlan-interface2] vrrp vrid 1 priority 150
# Create virtual router 2.
[LSW_A-vlan-interface2] vrrp vrid 2 virtual-ip 202.38.160.112
Configure switch B
# Configure VLAN2.
[LSW-B] vlan 2
[LSW-B-vlan2] interface vlan 2
[LSW-B-vlan-interface2] ip address 202.38.160.2 255.255.255.0
# Create virtual router 1.
[LSW_B-vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111
# Create virtual router 2.
[LSW_B-vlan-interface2] vrrp vrid 2 virtual-ip 202.38.160.112
# Set the priority for the virtual router.
[LSW_B-vlan-interface2] vrrp vrid 2 priority 110
n
Multiple virtual routers are often used in actual network applications.

Troubleshooting VRRP

As the configuration of VRRP is not very complicated, almost all the malfunctions
can be found through viewing the configuration and debugging information. Here
are some possible failures you might meet and the corresponding troubleshooting
methods.
Fault 1: Frequent prompts of configuration errors on the console
This indicates that an incorrect VRRP packet has been received. It may be because
of the inconsistent configuration of another switch within the virtual router, or the
attempt of some devices to send out illegal VRRP packets. The first possible fault
can be solved through modifying the configuration. And as the second possibility
is caused by the malicious attempt of some devices, non-technical measures
should be resorted to.