For those of us who like to maximize 802.11n bandwidth with channel bonding, configuring the Dot11Radio interface in the integrated AP with "channel width 40-above" can essentially double bandwidth in areas with available WiFi channels. See page 9-13 in Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Software Configuration Guide, for documentation.
However, when I attempted to do just what the Guide says on a recently purchased 881w, I found that the option is not allowed. Why?
Actually it's speced as 802.11n and I'm getting single channel n speeds. Also, for years I've been able to get dual channel bonding with 861w, but this unit with an integrated antennae has the command removed.
I am suspecting you were able to get channel bonding (with 2.4 Ghz) because you were using old IOS.
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