Windows Roaming

[stevemk1atou]

Hello,

Can anyone give any advice regarding Windows laptops that do not roam from one AP to another on the same 4400 controller? Particularly using an Atheros chipset - works fine under Linux...

It's a WPA2/AES enterprise network on a controller running 7.0.220.0

Thanks

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[Tony Davis]

What behavior are you seeing?  In other words, what makes you think it's a roaming issue? 

I will say that I have seen a few nics that have MAJOR issues connecting to our AP's... mainly, realtek wireless nics. 

Also, can you or have you tried using WPA/TKIP instead of WPA2/AES?  There are some clients that have a "harder" time decrypting and encrypting packets with the stronger encryption.  I have found from personal experience that lowering the encryption improves connectivity for several clients...

Thanks,

Tony

[stevemk1atou]

When walking from one AP to another the connection on the laptop drops and stays down even when walking back to the original AP. You can see from the controller debugs that the controller is trying to reauthenticate the client but the client seems to ignore it. I have done some more testing and have replicated the problem with a Broadcom adapter in a windows xp machine.

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[stevemk1atou]

This is where it seems to fail from the controller debugs:

Received EAPOL-key M2 with invalid MIC from mobile xx:xx:xx:xx:xx:xx

This only happens when roaming, connecting initially is not a problem.

[Tony Davis]

On the AP/controller you can't roam to, can you turn off wireless and back on and then it connects?

>>> stevemk1atou 1/23/2012 8:32 AM >>>

Home ( https://supportforums.cisco.com/index.jspa )

Re: Windows Roaming created by stevemk1atou ( https://supportforums.cisco.com/people/stevemk1atou ) in Other Wireless - Mobility Subjects - View the full discussion ( https://supportforums.cisco.com/message/3541543#3541543 )

This is where it seems to fail from the controller debugs:

Received EAPOL-key M2 with invalid MIC from mobile xx:xx:xx:xx:xx:xx

This only happens when roaming, connecting initially is not a problem.

Reply to this message by going to Home ( https://supportforums.cisco.com/message/3541543#3541543 )

Start a new discussion in Other Wireless - Mobility Subjects at Home ( https://supportforums.cisco.com/choose-container!input.jspa?contentType=1&containerType=14&container=2043 )

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