Dual-band SSID Best Practices?

[lleachii]

@prwood

So, when I set it to 157 with a bandwidth of 40MHz, OpenWRT shows it as broadcasting on channel 161, where if I do 20MHz, 157 shows as 157. Does this have something to do with the channel being positioned relative to the bandwidth requested?

Yes, see the chart here:

Linksys WRT3200ACM only transmits with 20 MHz on the AC radio

I think there's a misunderstanding on how bands/frequencies are considered in relation to what's called the "center" and "edge." Nonetheless, from the Wikipedia diagram you presented yourself, channel 42 (or Channel 36+40+44+48) touches 5.250...therefore, it's covered if running in 80 MHz mode (which is the bandwidth of the channel in question). With that said, you also need to understand that...by selecting 36, you are selecting 42. Why?? ...because you have channel 36 (which is the 20 MHz r…

@prwood

How would I determine the gain of my current antennae?

You minus the gain of the old, and add the gain of the new. Be advised, changing antennae could change Part 15 authorization in the US (even though a lot of devices came with detachable antennae).

@prwood

If my upstream cable internet connection is only 60 megabit, is there going to be any real difference between a 150 megabit and a 300 megabit wireless lan?

No bufferbloat due to being on WiFi versus wired...that's all I can think of at the moment...

Hope this helps.