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mikrofrank
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Joined: Thu Jan 21, 2021 9:02 pm

Wireless - Channel List for 5GHz - only 20MHz channels are working (errors on 40/80MHz)

Wed Mar 31, 2021 10:20 pm

Hi there,
I guess I'm missing something ... There is a bit of a chaos on 5GHz around my flat so I decided to define a manual channel list for this frequency band. Otherwise, I have dropped connections as the Mikrotik stays in the lower channels on 5GHz where recently showed up a few more wifi netowrks.

I thought I understood how to define a channel by https://en.m.wikipedia.org/wiki/List_of ... j/n/ac/ax)

However, as soon as I try to define a channel with 40MHz or 80MHz, the wireless module complains by "in scan-list unsupported channel: chYY".

This is my wireless config:
/interface wireless
set [ find default-name=wlan2 ] band=5ghz-onlyac channel-width=20/40mhz-XX country=germany disabled=no frequency=auto hide-ssid=yes mode=\
    ap-bridge name=[...] scan-list=5GHz ssid=[...] station-roaming=enabled vlan-id=99 wireless-protocol=802.11 wps-mode=\
    disabled
set [ find default-name=wlan1 ] band=2ghz-onlyn country=germany default-forwarding=no disabled=no frequency=auto hide-ssid=yes mode=\
    ap-bridge name=[...] ssid=[...] station-roaming=enabled vlan-id=66 wireless-protocol=802.11 wps-mode=disabled
And these channels I tried to define with the result of the above error:
List 5GHz
- channel 62 / 5310.000 / 40.000 / 5GHz-A / Ce
- channel 140 / 5700.000 / 40.000 / 5GHz-only-AC / disabled
(and I played with a few more; also activated indoor frequencies in the wireless settings with no result)

Does anyone know a detailed how-to on this for German 5GHz channels or an exemplary config? Thanks a lot!
 
mistry7
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Re: Wireless - Channel List for 5GHz - only 20MHz channels are working (errors on 40/80MHz)

Thu Apr 01, 2021 4:19 am

Your channels are not allowed.

The lower band end with 5330, setting 5310Ce it will use 40MhZ from 5300-5340,
You are out of Band.
Same on 5700 Ce, Last available channel with 40Mhz is 5680
 
mikrofrank
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Posts: 14
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Re: Wireless - Channel List for 5GHz - only 20MHz channels are working (errors on 40/80MHz)  [SOLVED]

Thu Apr 01, 2021 11:10 pm

The lower band end with 5330, setting 5310Ce it will use 40MhZ from 5300-5340,
You are out of Band.
Same on 5700 Ce, Last available channel with 40Mhz is 5680
Thanks, I played around a bit more, set Channel Width in the wireless main interface = 20/40/80MHz XXXX, and these channels work now even for 80MHz:
- ch56 / 5280.000 / 20.000 / eCee = 80MHz
- ch104 / 5520.000 / 20.000 / eCee = 80MHz

These work with Country = German and Installation = indoor.

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