Did you ever get a response of find the answer to this? I am in the same boat. Lots of hidden nodes and lots of AP's on the same channel. I am wondering if Cisco is getting out of the client card market.
Cisco never answered (not like I really expected them to). The answer to the question is that Cisco rebrands Atheros cards, and the Atheros reference drivers and client utilities don't have this functionality.
I just got my first response from TAC on this. I asked how do I set the fragmentation and RTS threshold on the cb21ag card. The response was that I set these on the AP and I should not adjust these because they are set to optimum. I asked for the case to be escalated to someone who actually knows what and why I need to set these.
I feel like I am dealing in the "Black Arts" when asking questions about building large scale 802.11 wireless networks and dealing with these issues.
That post was a year ago, and at that point, my statement was spot on. Today, I would definitely say that more Cisco engineers are up-to-speed on 802.11 1) than ever before, and 2) as much or more than any of their competitors. That's a long way to come in 1 year, so my congratulations.
I work a lot of wireless and I have to agree. There was a time back when I posted this message that it was like a mystery if you called and wanted to discuss anything beyond a basic AP configuration and forget about RF issues. Now things are starting to get better.
