Troubleshooting Vrrp - H3C S7500 Series Operation Manual

Operation Manual – VRRP-HA
H3C S7500 Series Ethernet Switches
# Create backup group 2.
[LSW-A-Vlan-interface2] vrrp vrid 2 virtual-ip 202.38.160.112
Configure Switch B.
# Configure VLAN 2.
<LSW-B> system-view
System View: return to User View with Ctrl+Z.
[LSW-B] vlan 2
[LSW-B-vlan2] port Ethernet 2/0/6
[LSW-B-vlan2] quit
[LSW-B] interface vlan-interface 2
[LSW-B-Vlan-interface2] ip address 202.38.160.2 255.255.255.0
# Create backup group 1.
[LSW-B-Vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111
# Create backup group 2.
[LSW-B-Vlan-interface2] vrrp vrid 2 virtual-ip 202.38.160.112
# Set the priority for backup group 2.
[LSW-B-Vlan-interface2] vrrp vrid 2 priority 110
Note:
Normally, multiple backup groups are used in actual networking.

1.5 Troubleshooting VRRP

You can locate VRRP problems through the configuration and debugging information.
Here are some possible failures you might meet and the corresponding troubleshooting
methods.
I. Symptom 1: Frequent prompts of configuration errors on the console
This indicates that incorrect VRRP packets are received. It may be because of the
inconsistent configuration of the switches within the backup group, or the attempt of
other devices sending 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.
II. Symptom 2: More than one master existing within a backup group
There are also 2 reasons. One is short time coexistence of many master switches,
which is normal and needs no manual intervention. Another is the long time
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Chapter 1 VRRP Configuration