881w - 802.11n, what happened to 40 MHz channel width?

[thomasmcleod]

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?

[Leo Laohoo]

860W & 880W built-in AP is only 802.11b/g.

You won't be able to do channel-bonding with 2.4 Ghz.

[thomasmcleod]

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.

[Leo Laohoo]

I am suspecting you were able to get channel bonding (with 2.4 Ghz) because you were using old IOS.

Sent from Cisco Technical Support Nintendo App

[Leo Laohoo]

[thomasmcleod]

The IOS version of the last router that had bonding enbled was 12.4(20)T1.

[Leo Laohoo]

The IOS version of the last router that had bonding enbled was 12.4(20)T1.

Not the router.  The IOS of the AP.

[thomasmcleod]

AP version on older unit is 12.4(10b)JA3

[Leo Laohoo]

Yes.  I think those will do.

[thomasmcleod]

So, the old version had bonding capability but the new version doesn't? The new version is 12.4(25d)JAX.