05-06-2008 10:18 PM - edited 03-05-2019 10:47 PM
05:39:42: %C4K_EBM-4-HOSTFLAPPING: Host 02:01:00:00:00:00 in vlan 1 is flapping between port Gi2/7 and port Gi2/14,where Gi2/7 and Gi2/14 were connected to two servers.both are in Vlan1.We are using PVST in our LAN.why this problem occurs?
Any help can be appreciated
Regards
Bava
05-06-2008 10:53 PM
Yes its a STP loop. You need to identify the culprit causing the loop.
Check with the command "sh spanning-tree root"
to see if the root for vlan 1 has changed.
05-07-2008 02:21 AM
I found that the root for vlan 1 is not changed and there is no loop also.still the problem exists
05-07-2008 10:47 AM
It's likely to be a duplicate mac address in your network. The mac address you mentioned seems to be locally administered. So it's probably been generated by an application or a device. Try to find out where the entries are leading to in order to find the culprit(s).
Regards,
Francois
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