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MAC addr flapping and Wireless LAN

I have a switches network with 4000s and 2950s. There is a large hall which is equiped with wireless LAN. The access points are divided over several 2950s. I get a lot of warnings:

%SYS-4-P2_WARN: 1/Host 00:90:7a:00:c4:33 is flapping between port 3/5 and port 3/4

I looked it up, and this could be caused by a stp loop.

I think this can be caused by wireless equipment (mounted on trucks) driving around, and changing access points.

Does anybody have expierience in with this kind of problem?

Can the flapping MAC address cause spanningtree problems?

Thanks

Pim

2 REPLIES
New Member

Re: MAC addr flapping and Wireless LAN

It sounds like it could be an ARP timeout issue as the MAC moves between access points ?

New Member

Re: MAC addr flapping and Wireless LAN

The docs tell me this warning is generated when an address switches link twice in 15 seconds.

With Wireless basestations connected to different switches, I can imagine this happens if the device is on the edge of two base stations.

Can this affect my spanningtree calculations?

Can it interrupt the network?

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