Hello,

I have RB4011iGS+5HacQ2HnD-IN router.
The problem is my 5Ghz SSID randomly disappears.Log is clean.
I try use fixed 5180 Channel width 20/40MHz Ce, but this not fix problem.
I try use ROS 6.43.14 (Long-term), 6.44.2 (Stable), 6.45beta34 (Testing) - not matter.

Secondary problem - ethernet ports is randomly flapping: link donw/link up.
Fix - dissable auto neogation and manualy choose port speed, but is no good idea.

Please help!

Hello,

I have RB4011iGS+5HacQ2HnD-IN router.
The problem is my 5Ghz SSID randomly disappears.Log is clean.
I try use fixed 5180 Channel width 20/40MHz Ce, but this not fix problem.
I try use ROS 6.43.14 (Long-term), 6.44.2 (Stable), 6.45beta34 (Testing) - not matter.

Secondary problem - ethernet ports is randomly flapping: link donw/link up.
Fix - dissable auto neogation and manualy choose port speed, but is no good idea.

Please help!

Hello Estas, is software bug of firmware. That is, the initialization of MAC addresses on interfaces..

viewtopic.php?f=3&p=727791&sid=d249a516 ... 14#p727791

Hello TimurA!

Ohhhhh s...t! Thank you !

I cnanged wlan1 MAC address, but this not fix problem. 5Ghz still randomly disappering. Log claen.

I changed wlan1's MAC address, but this doesn't' fix the problem. 5Ghz still randomly disappearing. Log is clean.

You can't change it on your own, there is an internal problem. This is just a sign.

I can change wlan1 MAC via winbox....or not? Explain please.

Hi mikrotik

Whats news about rb4011 5ghz wifi problem?
Your support not answered about my problem.
Its hardware problem?
I should change you hardware?
Tell the truth!

This might be related to viewtopic.php?f=7&t=148263 !?
At least it sounds similar.

This might be related to viewtopic.php?f=7&t=148263 !?
At least it sounds similar.

No, 5ghz was originally bad for RB4011. On our device, everything is sad and bad. Regardless with capsman or without.

viewtopic.php?f=3&t=142298

viewtopic.php?f=7&t=145834

I started to have this issue:
I have RB4011iGS+5HacQ2HnD and cAP ac connected to it. Each on one floor. Both serving 2 and 5 GHz WiFi.
On my RB4011iGS+5HacQ2HnD the 5GHz got stuck in "initializing" state with, I believe 6.44.2 version.
I upgraded to 6.45.6.
5GHz started cycling in "detecting radio", "running ap", "initializing", but never got working.
I switched the Channel Width to 20/40/80MHz eeeC.

Now it works.

What kind of devices are your clients? Are there other APs in nearby frequencies?

+1 to the problem.
5G network is working sometime after router reboot. Then wlan1 is in "running ap" mode, but 5G ssid is not available. After restarting wlan1 it stucks in "initializing" mode with no further changes.
I use macbook 2016 only for this network and there are no other 5G networks available around.

When will this crap be repaired ??? I reboot the router 2-5 times a month ... Even D-LINK did not behave like that.

When will this crap be repaired ??? I reboot the router 2-5 times a month ... Even D-LINK did not behave like that.

There is no problem with 5Ghz in RB4011, in general...
There is either bad configuration or a hardware problem...

I would netinstall and carefully configure my device again...

The interface 5ghz on beta59 will no longer crash. Thanks to the mikrotik team and Reinis for the great work done!

+1

I have the same problem with 5Ghz SSID disappearing after some time / some days.
Come again after reboot - but 5Ghz SSID show much much later than the 2.4 Ghz SSID.

Please fix the problem as soon as possible.

Hi, I’m facing same issue, 5ghz Wi-Fi stucks on initializing. Wi-Fi Scan for 5ghz also doesn’t work so it seems that wifi module really doesn’t work.
Is it firmware issue or hw problem?

Hi, I’m facing same issue, 5ghz Wi-Fi stucks on initializing. Wi-Fi Scan for 5ghz also doesn’t work so it seems that wifi module really doesn’t work.

I have the same problem with 5Ghz SSID disappearing after some time / some days.

What version are you using, as mentioned previously, the fix is only in 6.46beta59 or higher

Come again after reboot - but 5Ghz SSID show much much later than the 2.4 Ghz SSID.

It is normal due to regulations and standards, ex. DFS.


If you have 6.46beta59 or higher and still encounter SSID disappearance for 5GHz interface, reboot the device and do the following:
1. Use WiFi analyzer software and take a screenshot of all nearby SSID's within 5GHz range showing each SSID channel number.
2. Generate supout.rif after 5GHz SSID disappeared
3. Enable/Disable or Provision the 5GHz interface
4. Use WiFi analyzer software and take a screenshot of all nearby SSID's within 5GHz range showing each SSID channel number.
5. Generate second supout.rif
6. Visit https://help.mikrotik.com/servicedesk/ and submit a ticket providing both supout.rif files, two screenshots, details about all the clients that were connected to the given AP (any interface) while the 5GHz SSID disappeared.

I recently upgraded from LTS 6.44.6 to 6.45.8 and since this issue has appeared 3 times.

1 Time after +/- 1 week
2/3 After 1 day.

I will produce the required files so support could take a look on it, or should I switch to 6.46 (Stable)?

I upgraded same device to 6.45.8 and the 5G disappears after a day. Devices can't even see it.
After reboot it appears and works correctly for hours/days ( variable ) and then disappears.
It worked perfectly from a previous version in stable. But I made all our devices CCRs, caps, run the same version and now experience this issue.

It would be really really really helpful if Wifi interface had a "DFS" statistic to identify if such issue
is DFS related (I expect half of above observations probably be due to that), or other real HW / SW problems!
Something like:

• Last time DFS signal deteceted

• Last time DFS scan done

• Total number of DFS detection since boot up

with above it would be a good starting point to see if "SSID disappearing" is really a Mikrotik issue.
AND it would allow user to understand how good DFS channel can be used or not!

Is this hardware revision related flaw?

I wanted to buy this device but now im hesitant do to so.
What is the latest hw revison of this device?

As mentioned above, there can be two causes, one is when the DFS mechanism is looking for radars, if you use a frequency in the DFS range. Simply setting a different frequency will resolve it.

The other one is also software related, multiple wireless fixes for the ARM platform were recently released. Make sure you upgrade RouterOS.

There is no known hardware issue with RB4011 and 5GHz.