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Wireless dropping

We have a Cisco 4124 Wireless Controller with AP1010's deployed throughout our facility.

Our clients are loosing their wireless network connection several times a day, and the following logs are shown in the 4124's Message Log:

Thu Jan 19 10:32:04 2006 Previous message occurred 2 times

Thu Jan 19 10:31:38 2006 [SECURITY] 1x_bauth_sm.c 424: Backend Authentication SM: abortAuth: Authentication Aborted.

Thu Jan 19 10:31:36 2006 [SECURITY] 1x_ptsm.c 419: MAX EAPOL-Key M3 retransmissions reached for mobile 00:0b:7d:06:cd:68

Thu Jan 19 10:31:03 2006 [SECURITY] 1x_ptsm.c 419: MAX EAPOL-Key M1 retransmissions reached for mobile 00:0b:7d:06:cd:68

Thu Jan 19 10:30:53 2006 [SECURITY] 1x_ptsm.c 419: MAX EAPOL-Key M3 retransmissions reached for mobile 00:0b:7d:06:cd:68

Clients are running XP SP2 w/ the WPA2 package. Their wireless cards are Dell 1350 (b/g) with the BCM4306 / BCM2050 chipsets.

Security is 802.1x with PEAP, Microsoft IAS RADIUS servers handling authentication.

Thoughts on ways to make wireless more stable for our users? Thank you.

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