Ok, this seems like a stupid question, particularly considering I can't find anybody else who seems to have a problem figuring this out, but..
Where can I find an option to choose between 20MHz and 40MHz channels for 802.11n mode on my router? Also, is there some way to choose upper or lower side-channel for 40MHz mode?
I installed Tomato (K26-1.28.RT-N5x-MIPSR2-138-Max) on my Asus RT-N12 (2.4GHz-only B/G/N router).. It appears to be currently using a 40MHz channel width (based on scans run from a client machine), but my local area is very congested and I would like to try setting it to 20MHz to see if I can get more reliable results that way..
The problem is, I can't find the setting to do this anywhere.. I've seen some (apparently older?) screenshots suggesting there should be a pulldown box in the GUI right underneath the channel number selector, but it's just not there. I've looked in both the basic and advanced configuration. Is 20MHz mode just not supported?
Likewise, I can't find any setting for what range to use for the 40MHz channel. It does have a selector box under Basic/Network to choose from channel 1-11 (or Auto), but this appears to do absolutely nothing (I'm assuming because it's in 40MHz mode?), and I can't find anything else to let me select whether to use the lower (channel 1-6) or upper (channel 6-11) range of the spectrum (or what channel to use for B/G traffic, for that matter). I've seen posts suggesting there should be an option to configure this, but can't find it anywhere (or find anything that tells me where it should be)..
Any help would be much appreciated..