Troubleshooting Vrrp - H3C S5600 Series Operation Manual

Operation Manual – VRRP
H3C S5600 Series Ethernet Switches
[Sysname-vlan2] port GigabitEthernet1/0/2
[Sysname-vlan2] quit
# Configure VLAN-interface 2.
[Sysname] interface Vlan-interface 2
[Sysname-Vlan-interface2] ip address 202.38.160.1 255.255.255.0
[Sysname-Vlan-interface2] quit
# Create a VRRP group.
[Sysname] interface Vlan-interface 2
[Sysname-Vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111
# Enter GigabitEthernet 1/0/1 port view and enable the VRRP tracking function.
[Sysname] interface GigabitEthernet1/0/1
[Sysname-GigabitEthernet1/0/1] vrrp Vlan-interface 2 vrid 1 track reduced 50

1.5 Troubleshooting VRRP

You can locate VRRP problems through the configuration and debugging information.
Here are some possible symptoms 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 VRRP group, or the attempt of
other devices sending illegal VRRP packets.
The first possible fault can be solved through modifying the configuration.
The second possibility is caused by the malicious attempt of some devices;
non-technical measures should be taken to solve the problem.
II. Symptom 2: More than one master existing within a VRRP group
There are also 2 reasons. One is short coexistence of many masters, which is normal
and needs no manual intervention. Another is long coexistence of many masters, which
may be caused because the original master and other member switches in a VRRP
group cannot receive VRRP packets from each other, or receive some illegal packets.
To solve such a problem:
An attempt should be made to ping among these masters.
If such an attempt fails, check the connectivity between related devices.
If they can be pinged, check VRRP configuration.
For the configuration of a VRRP group, complete consistency for the number of
virtual IP addresses, each virtual IP address, timer interval and authentication type
configured on each member switch must be guaranteed.
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Chapter 1 VRRP Configuration