Troubleshooting Vrrp - H3C S5500-EI Series Operation Manual

Operation Manual – VRRP
H3C S5500-EI Series Ethernet Switches
The above information indicates that in standby group 1 Switch A is the master, Switch
B is the backup and the host with the default gateway of FE80::10 accesses the
Internet through Switch A; in standby group 2 Switch A is the backup, Switch B is the
master and the host with the default gateway of FE80::20 accesses the Internet
through Switch B.
Note:
Multiple standby groups are commonly used in actual networking. In IPv6 network, you
need to manually configure the default gateway for VRRP standby group to share load.

1.6 Troubleshooting VRRP

Symptom 1:
The console screen displays error prompts frequently.
Analysis:
This error is probably due to the inconsistent configuration of the other switch in the
standby group, or that a device is attempting to send illegitimate VRRP packets.
Solution:
In the first case, modify the configuration.
In the latter case, you have to resort to non-technical measures.
Symptom 2:
Multiple masters are present in the same standby group.
Analysis:
If presence of multiple masters only lasts a short period, this is normal and
requires no manual intervention.
If it lasts long, you must ensure that these masters can receive VRRP packets and
the packets received are legitimate.
Solution:
Ping between these masters, and do the following:
If the ping fails, check network connectivity.
If the ping succeeds, check that their configurations are consistent in terms of
number of virtual IP addresses, virtual IP addresses, advertisement interval, and
authentication.
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Chapter 1 VRRP Configuration