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deemon
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5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 4:00 pm

Have RB4011iGS+5HacQ2HnD. (thanks MT for this super product name ... LOL)
Had power outage here for like 10 minutes and after power came back on, only 2.4GHz wifi came back and wired connection.

5GHz wifi is not completely dead, as I can still scan with winbox and get to see table with neighbours 5GHz wifis...
But my own defined (and previously perfectly working) SSID does not show up in any of my devices. Disabling and re-enabling the QCA9984 doesn't change anything.

How to even start to troubleshoot, what might have gone wrong?

edit: what is going on. the 5GHz wifi appears after like 20-25minutes afterwards (and started working... by itself.) So the qualcomm chip bootup time is 20+minutes?
disabled; re-enabled and same thing happened second time... it became available after re-enabling after 20+ minutes....
Last edited by deemon on Mon Jun 28, 2021 4:56 pm, edited 1 time in total.
 
erlinden
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 4:07 pm

Could be that it is still radar scanning, which can take up to 10 minutes before starting to work.
Can you please provide your wireless settings?

/interface wireless export hide-sensitive file=anynameyoulike
 
deemon
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:01 pm

# jun/28/2021 16:58:36 by RouterOS 6.48.3
# software id = 98I9-VNJA
#
# model = RB4011iGS+5HacQ2HnD
# serial number = B8E00A4C7126
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-a/n/ac channel-width=\
    20/40/80mhz-Ceee country=no_country_set disabled=no distance=indoors \
    frequency=5500 frequency-mode=superchannel installation=outdoor \
    mac-address=74:4D:28:8C:70:74 mode=ap-bridge radio-name=744D288C7074 \
    secondary-channel=auto ssid="Asgardian Empire5" station-roaming=enabled \
    wireless-protocol=802.11 wps-mode=disabled
set [ find default-name=wlan2 ] band=2ghz-g/n basic-rates-a/g="" \
    basic-rates-b="" country=no_country_set disabled=no distance=indoors \
    frequency=2462 installation=indoor mode=ap-bridge ssid="Asgardian Empire" \
    station-roaming=enabled supported-rates-a/g=\
    9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps supported-rates-b="" \
    tx-power=20 tx-power-mode=all-rates-fixed wireless-protocol=802.11 \
    wmm-support=enabled wps-mode=disabled
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys \
    supplicant-identity=MikroTik
    
 
deemon
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:03 pm

Could be that it is still radar scanning, which can take up to 10 minutes before starting to work.
Ou... is that like a real thing? How can I see if this is the thing happening?
 
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:12 pm

It is the way is working, perfectly normal on 5GHz if you select dfs channel.

no_country_set has DFS on any channel

installation=outdoor
country=no_country_set
Last edited by rextended on Mon Jun 28, 2021 5:19 pm, edited 2 times in total.
 
deemon
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:15 pm

It is the way is working, perfectly normal on 5GHz if you select dfs channel.

no_country_set has DFS on any channel
that's the thing. I didn't. I chose 5500
 
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:17 pm

please do not quote if not necessary, use "post reply", thanks

what is your country?
 
deemon
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:28 pm

no_country_set
because efff regulatory domains.
 
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:29 pm

You need to set debug instead...

Understand the hint??? :))))
 
deemon
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:51 pm

Sadly no. Can you give more details? :-)

Anyway it seems my previously used channel-width=20/40/80mhz-XXXX wasn't also ideal... when set it to 20/40/80mhz-Ceee it seems to come up much faster. Then again, it might suffer from bad neighbors invading my channel :(
 
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 5:57 pm

...Sadly no...
Really?..........

/int wire set [find] country=debug
 
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bpwl
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Re: 5GHz wifi disappeared after power loss...

Mon Jun 28, 2021 9:23 pm

Please learn about DFS.

DFS is mandatory for any AP according country regulations. (does not apply to the client)
DFS will scan for radar for one full minute for frequencies from 5320 till 5700 for most countries. The fact that it is scanning IS IN THE LOG, when "wireless" has been added to system->logging
The weather channel frequencies 5600-5660 will need a full 10 minutes scan. (Even if just only a part of the 80MHz falls in the weather channels.)
During radar scan the interface will only scan. NOTHING is transmitted during that time.
If radar is detected then the scan process restarts on another frequency. If all channels have (even false) radar detect, the WLAN will never transmit.
If anything on the WLAN is touched, the scan process has to be done !
Most radar detects are "false positives", at least it looks like that.

Example log: (see the timing)
Klembord-2.jpg
.
"no country set" normally is illegal.
While no obeying DFS regulations, your device may show up in official weather maps. viewtopic.php?f=13&t=175752#p860786
You do not have the required permissions to view the files attached to this post.
 
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Re: 5GHz wifi disappeared after power loss...

Tue Jun 29, 2021 10:38 am

One thing are external ptp, another are AP inside home...

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