Overlapping channels

[tarun.pahuja]

Folks,

I have installed about 10 access-points in a company. Everything seems to be working fine, except fast roaming. I had a question about overlapping channels. Since the access-points have G radios, i presume that you can have 8 overlapping channels as appose to B radios which only have 3 overlapping channels. Am i right on this?

Also, would the access-points automatically select non overlapping channels so that they do not interfere with the adject AP frequency, or do i have to set that up manually??

Any advice would be highly appreciated!!!

Thanks

[kristjan.edvardsson]

I think you are confusing G radio with A. G operates in the same frequenzy as B does (2,4Ghz) so you still have the same overlapping channels support.

That is 3. A radio however has the possibility of 8 channels and uses the 5Ghz spectrum.

Regarding the automatic. The AP searches for the least congested channel during startup. I´m not sure but I think they try to choose noneoverlapping channels. So in order to load-balance with overlapping channels you´d need to manually set them. However Cisco reccomends that you manually set the channels. That way you may always be sure it stays the same.

regards. Kristjan Edvardsson CCNP Wireless Lan support specialist.

[jwmiller]

802.11g uses the same frequency band as 802.11b and thus is limited to the same 11 channels (US) and of these 11 channels, 3 are non-overlapping (1,6,11). Perhaps you were thinking of 8 channels being available in 802.11a. Also the access points can be set up to use the "least congested frequency" instead of selecting a discreet channel.