topic Re: Channel width in .11n in Wireless https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178119#M168008 <HTML><HEAD></HEAD><BODY><PRE __jive_macro_name="quote" class="jive_text_macro jive_macro_quote">How come that is possible ?</PRE><P>It is <EM><STRONG>technically</STRONG></EM> NOT possible to channel width 802.11b/g because of the LIMITED amount of channels to play with.</P></BODY></HTML> Wed, 03 Apr 2013 09:15:20 GMT Leo Laohoo 2013-04-03T09:15:20Z Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178118#M168007 <P>Hi ,<BR />I have a situation.<BR />According to what I have read .11n uses a channel width of 40mhz for better bandwidth .<BR />Yesterday while troubleshooting for some speed issues at my company , I stumbled upon a setting in 802.11b/g/n radio settings , in the configuration page .<BR /><BR />Where it mentioned that , the channel width under use is 20mhz.<BR />How come that is possible ?<BR />Should not it be changed to 40 MHz ?<BR /><BR /><BR />Sent from Cisco Technical Support Android App</P> Sun, 04 Jul 2021 06:49:44 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178118#M168007 rahul nair 2021-07-04T06:49:44Z Re: Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178119#M168008 <HTML><HEAD></HEAD><BODY><PRE __jive_macro_name="quote" class="jive_text_macro jive_macro_quote">How come that is possible ?</PRE><P>It is <EM><STRONG>technically</STRONG></EM> NOT possible to channel width 802.11b/g because of the LIMITED amount of channels to play with.</P></BODY></HTML> Wed, 03 Apr 2013 09:15:20 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178119#M168008 Leo Laohoo 2013-04-03T09:15:20Z Re:Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178120#M168009 <HTML><HEAD></HEAD><BODY><P>Err.. b/g ?<BR />Actually I am talking about .11n .<BR /><BR />And it does allow me to change to 40mhz by selecting the custom option but I am not sure whether to do it , also I wonder why it has been defaulted to 20 MHz in an AP with .11n radio.<BR /><BR />Sorry if I am missing something here.<BR /><BR />Please correct me if I am wrong .<BR /><BR /><BR />Sent from Cisco Technical Support Android App</P></BODY></HTML> Wed, 03 Apr 2013 09:21:54 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178120#M168009 rahul nair 2013-04-03T09:21:54Z Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178121#M168010 <HTML><HEAD></HEAD><BODY><P>802.11n occurs when you channel bond 802.11 a to 40 Mhz. </P><P></P><P>You will NEVER be able to channel bond 802.11 b/g.</P></BODY></HTML> Wed, 03 Apr 2013 09:25:55 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178121#M168010 Leo Laohoo 2013-04-03T09:25:55Z Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178122#M168011 <HTML><HEAD></HEAD><BODY><P>I remember earlier with cisco WLC code it was possible to bond 2.4 GHz channel in 40 MHz. With later releases they removed this and it is no longer possible.</P><P>I don't exactly remember what version was supporting that, maybe 6.0.196.0 or 6.0.199.x. I don't exactly remember. But what I remember that it was there and later the feature was removed.</P><P></P><P>Why removed? Just like what Leo explained, there are only 3 non-overlapping channels in 2.4 GHz ISM band. If you bond two channels in 40 MHz then there will be no more non-overlapping channels available for channel-reuse pattern. So, because that is not feasible it was removed.</P><P></P><P><SPAN style="color: blue;">Rating useful replies is more useful than saying <SPAN style="color: green;"> "<SPAN style="text-decoration: underline;">Thank you</SPAN>"</SPAN></SPAN></P></BODY></HTML> Wed, 03 Apr 2013 09:35:44 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178122#M168011 Amjad Abdullah 2013-04-03T09:35:44Z Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178123#M168012 <HTML><HEAD></HEAD><BODY><P>Hi Rahul,</P><P></P><P>Please follow the steps in the following link:</P><P><A class="jive-link-external-small" href="http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a0080a3443f.shtml">http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a0080a3443f.shtml</A></P><P></P><P>I hope this helps.</P><P></P><P>Marty<SPAN __jive_emoticon_name="happy" __jive_macro_name="emoticon" class="jive_macro jive_emote" src="https://community.cisco.com/4.5.4/images/tiny_mce3/plugins/jiveemoticons/images/spacer.gif"></SPAN></P></BODY></HTML> Wed, 03 Apr 2013 09:38:41 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178123#M168012 marstoyanoff 2013-04-03T09:38:41Z Re:Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178124#M168013 <HTML><HEAD></HEAD><BODY><P>Ohh..I get it now guys !<BR />Thank you .<BR /><BR /><BR /><BR /><BR />Sent from Cisco Technical Support Android App</P></BODY></HTML> Wed, 03 Apr 2013 10:01:36 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178124#M168013 rahul nair 2013-04-03T10:01:36Z Re: Re:Channel width in .11n https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178125#M168014 <HTML><HEAD></HEAD><BODY><P>It was possible with early release when the 1252 APs came out to channel bond 2.4ghz. You no longer have that option with any if the Cisco enterprise equipment. The small office home office devices still allow you to channel bond in the 2.4ghz but not any of the enterprise Cisco wireless devices.<BR /><BR />Sent from Cisco Technical Support iPhone App</P></BODY></HTML> Wed, 03 Apr 2013 11:23:42 GMT https://community.cisco.com/t5/wireless/channel-width-in-11n/m-p/2178125#M168014 Scott Fella 2013-04-03T11:23:42Z