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New Member

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

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?

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9 REPLIES
Hall of Fame Super Gold

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

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

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

New Member

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

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.

Hall of Fame Super Gold

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

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

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Hall of Fame Super Gold

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

New Member

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

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

Hall of Fame Super Gold

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

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

Not the router.  The IOS of the AP.

New Member

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

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

Hall of Fame Super Gold

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

Yes.  I think those will do.

New Member

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

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

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