11b and 11g association issues

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Nov 27th, 2007
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My customer site is having issues with 802.11b clients not associating to a WLC 4402-50 controller that is setup for both 11b and 11g. 802.11g is working fine. As a test, the client's wireless mode was set to 802.11g at the user WIC Settings. But, it still showing connection failed. Also found that the user MAC still coming in the Controller as 802.11b.

What are we missing here?

Thanks for any help.

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Richard Atkin Tue, 11/27/2007 - 16:20
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Do all .11B clients fail, or just some?

- If all - I'd look at WLC issues

- If some - I'd look at client issues

1. Update all of your drivers and software versions.

2. Sniff the packets over the air and see what rates the WLAN is advertising / what rates the client will support (ie, check what's actually happening).

Rob Huffman Wed, 11/28/2007 - 07:45
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Hi Richard,

Just to add a note to the good info from Richard. Are you running any 11b supported data rates like 2.0 5.5 6.0 9.0 11.0

Note The client must support the basic rate that you select or it cannot associate to the wireless device. If you select 12 Mbps or higher for the basic data rate on the 802.11g radio, 802.11b client devices cannot associate to the wireless device's 802.11g radio.

Just a thought,



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