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Mac addresses flapping

Unanswered Question
Sep 12th, 2005
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Hi,


I have a network with cat6500's as a core, and off them 3500 switches to different patchrooms where desktops are patched to the switches. Off the 3500's I have a few 1200 access points to provide a wireless network to allow users to roam with their laptops.


A few times a week I get address flap syslog messages from the 3500 switches saying that addresses are flapping between the port that the 1200 is on and the uplink to the core of the network (the 6500's).


So all I can think of is that users are all associating between AP's and the switches are seeing the MACs moving between the ports. I should imagine this is normal behaviour for 1 or two users at a time, but is it normal for 10 or more macs to flap (or roam) between AP's? Is this normal, or even a problem? Or should I just ignore the address flap syslogs?

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