I have a 4506 switch configured and it's giving the followiing error messages
Nov 3 14:47:59: %C4K_EBM-4-HOSTFLAPPING: Host 02:01:91:46:66:01 in
vlan 901 is
Now I have bpdufilters on the give port numbers specified in the error messages withe loopguard, pvst,uplink and backbone fast configured. When I do a sh mac-address-table it gives me mulitcast entries with a number of ports...How can I fix this issue.
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Yea I understand you the loop the bpdu's are not transmitted by servers, workstations or any other devices that are not switching devices. But the bpdu filter is not the problem in this instance..What I'm receiving is multicast that may be have the same multcast information...How can I fix this issue..
The message you are receiving is a result of a host MAC address appearing on multiple ports. That happens where there is a loop. Whether you realize it or not, there is a loop in your network. You can do a "show spanning-tree" on all your switches to determine where it is. You may find that one of the ports you've enabled BPDU filter on is in reality connected to another switch.
But no matter what, you've got loop.
donjohnston, thanks for the response. in my case i actually did find a switch that had a fiber trunk and a ethernet trunk to the same core switch. the ethernet trunk was in a blocking state upon sh spantree. once in a blocking state does that mean it would have been causing hostflapping or a loop? or does that mean STP shut it down?
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by: donjohnstonPosted on 2007-11-06 at 04:05:38ID: 20223075
Disable BPDU filter.