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3Com Switch 4800G 24-Port - Troubleshooting VRRP

3Com Switch 4800G 24-Port
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Troubleshooting VRRP 1105
Preempt Mode : YES Delay Time : 0
Auth Type : NONE
Virtual IP : FE80::10
Master IP : FE80::1
Interface : Vlan-interface2
VRID : 2 Adver. Timer : 100
Admin Status : UP State : Master
Config Pri : 110 Run Pri : 110
Preempt Mode : YES Delay Time : 0
Auth Type : NONE
Virtual IP : FE80::20
Virtual MAC : 0000-5e00-0202
Master IP : FE80::2
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.
n
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.
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:

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