Hi guys i have rbm33g with two wireless card one for 2.4ghz /AR9370/ and other/QCA9880/ for 5 ghz . But sometimes 5ghz wireless radio disappear. In winbox all look OK , i disable/enable the interface but that not resolve the problem. Only when i reboot the routerbord the radio is available . This is happen randomly after 2 days, 2 weeks, 5 days, next day ...
I have had this board for more than 2 years, at one time this problem had appeared at the beginning, but it seems that the new versions of ROS have fixed it. Unfortunately, this problem may appear again in 2 months. I have tried all available versions for the board except version 7, but the problem remains. My question is did I put the cards in correctly and shouldn't a jumper fix it?

What's frequency setting? Auto or fixed frequency? What is it? I'm sure you're aware of DFS and rekated AP behaviour.

Тhese are the interface settings:

I had a similar issue with RBM11G and R11e-5HacD. Now 6.46.8 installed and no problem

I had a similar issue with RBM11G and R11e-5HacD. Now 6.46.8 installed and no problem

Thanks. I will test it again with this version !

The issue appear today again , after 4 days !

Wifi disappearing can be two things :
- HW problem (in this case don't know what you could do for solving it)
- DFS/ radar detected.
If DFS detected the log will show it (I think it is part of "info" logging. else add "wireless" for lagging).

In the interface tab, while the Wifi i/f being "absent", in the lower right tab part it will say : "radar detection" and it will show "not active"

PS: I exclude the 3rd one, ROS problem as I can not imagine this being SW problem if you use long term ROS version on your board...

Your client is set to auto frequency and channel width setting?

Your client is set to auto frequency and channel width setting?

I use fixed channel - viewtopic.php?f=7&t=170718#p834491
I try last RC ROS with skip DFS channels=all