I have inherited the following wireless infrastructure: Cisco WDS control units and 1131APs. Using 802.11b and g. 7 - 9 WAPs per floor. Configured for channels 1,6,11. Had issues with roaming using authentication with VPN tunnels. Moving to WPA2 and Cisco ACS. 7-9 WAPS per floor. Some same channels do overlap with minimum signal strength. With three channels to pick from it is unavoidable? I am confused as to how roaming should work. It seems to me that WAPs with same channels would enable better roaming but there would be channel to channel interference (bad thing, so I am told). Roaming between channels should cause for some delays and therefore greater chance of 'drops'. I am also aware that companies like Meru Networks use only one channel. Can someone explain these channel issues in regards to roaming, channel contention, and delays?