I want to remove 11mbps on my 4404 running 126.96.36.199. I understand that any client on that data rate will be dropped or moved to a higher data rate, if available. But in general, are clients connected at a higher data rate affected when I remove this slower data rate?
Client connected at a higher data rate ideally will not be affected when you remove slower data rate but......the rates at which clients operate depends on how far the client is from AP. So if client is near to AP it will operate at higher rate but same when it moves away from the AP the data rates will be dropped to lower level.
Being said that if you done a proper site survey and you are sure that there is enough coverage overlap of non interference channel then you can go ahead and remove the lower rates. It goes with out saying that if you disable 11mbps and below 802.11b devices will not be able to connect.