Primary and extension channels selection for 40MHz channels 5GHZ

[inteldarvid]

Hello Experts, 

When I try to enable Channel width to 40MHz, a message returns as "Make sure primary and extension channels are selected for 40MHz channel width". I don't see any similar message when I am setting the channel widths to 80MHz or 160 MHz.

What do this message signify? Will any additional consideration be taken into account while configuring the channel width to 40 MHz?

Thank you

[eglinsky2012]

Is channel 120 selected? It needs to be if 116 is also selected if width is 40 MHz.

[Rasika Nayanajith · Accepted solution]

Yes, in the given list channel 116 & channel 140 does not have a secondary channel if you want to go with 40MHz. Try remove those two channels from your DCA list

Here is the 5GHz spectrum (You can get a copy from WLAN Professional site - Thank you Keith)

HTH
Rasika
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[inteldarvid]

Thank you dear. I remove The channels 116 and 140. Its works. Thank you

[Rasika Nayanajith]

Great to hear that.