Troubleshoot Vrrp - Huawei Quidway S3500 Series Operation Manual

Operation Manual - Reliability
Quidway S3500 Series Ethernet Switches
virtual router 2 and vice versa for switch B. Some hosts employ virtual router 1 as the
gateway, while others employ virtual router 2 as the gateway. In this way, both load
balancing and mutual backup are implemented.
II. Networking diagram
See Figure 1-3.
III. Configuration Procedure
Configure switch A
# 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
# 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

1.5 Troubleshoot 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. 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.
II. Fault 2: More than one Masters 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
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Chapter 1 VRRP Configuration