Troubleshooting Vrrp - H3C S9500 Series Operation Manual

Operation Manual – VRRP
H3C S9500 Series Routing Switches
# Create virtual router 2.
[LSW_A-vlan-interface2] vrrp vrid 2 virtual-ip 202.38.160.112
2) 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
Note:
Multiple virtual routers are often used in actual network applications.

1.5 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.
I. Symptom 1: Frequent prompts of configuration errors on the console
This indicates that incorrect VRRP packets have been received. It may be because of
the inconsistent configuration of another switch within the virtual router, or the attempts
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.
II. Symptom 2: More than one Master existing within the same virtual router
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
coexistence of many Master switches, which may be because switches in the virtual
router cannot receive VRRP packets from each other, or receive some illegal packets.
To solve such problems, an attempt should be made to ping the master switches. If
such an attempt fails, check the device connectivity. If they can be pinged, check the
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Chapter 1 VRRP Configuration