Hi,

this message is kinda directed to support as I believe it is a heavy problem, but maybe I am not the only one who can reproduce this problem and I suspect it isn't actually only a hardware thing.

Instead of many words let me direct you to an a presentation of the problem (with pictures).

I'd like also to draw attention of the MikroTik support to the ticket Ticket#2015042966000707 . If your guy asks me after reading all of this whether I am using two SXT's and that I can use wireless-fp the same way as I'd wireless package, there is something wrong... huh?

Have you tried running that board outside the plastic case, routing all pigtails so that they are as far from other card's as possible?

Have you tried using wireless-fp driver instead of wireless?

Humm i have also problems (but not the same ones) with RB912+R11E-5..
http://forum.mikrotik.com/viewtopic.php?f=7&t=97114
Also posted a ticket and waiting for reply.

I'll try do downgrade to 6.18 to see if it solves my problem

Have you tried running that board outside the plastic case, routing all pigtails so that they are as far from other card's as possible?

While there was some improvement, I can't really say that it fixed the problem.

Have you tried using wireless-fp driver instead of wireless?

Wireless-fp means to actually run WLAN controller first which I haven't setup yet... actually working on it now.
(Also hoping to use CM2 in the future, that's why I don't want to use FP as a workaround.)

Have you tried running that board outside the plastic case, routing all pigtails so that they are as far from other card's as possible?

While there was some improvement, I can't really say that it fixed the problem.

Have you tried using wireless-fp driver instead of wireless?

Wireless-fp means to actually run WLAN controller first which I haven't setup yet... actually working on it now.
(Also hoping to use CM2 in the future, that's why I don't want to use FP as a workaround.)

no, with wireless-fp is not mandatory to do capsman

wireless-fp its the main wireless package today in 6.30 wireless no fp package will be retired from default installation, CM2 must be considered beta.

in logs looks like you are doing a lot of things on that AP (dynamic routing etc), try using AP only to do bridge mode and fast path without any aother features to isolate the problem.

remove any un-needed package, in my APs y only use the following packages:

system
wireless-fp

maybe wireless is a sympton but not the cause

check updated firmware and ros

looks like other users report similar issue.

some say its a power related issue.

maybe trying 5dbm power on both wireless cards can prove this

Same issue here. We had 25 deployed and had to removed all the cards because of the exact same issues. They were better on 6.18 but still a unstable. We haven't tried other cards but it's either the r11e or the irq issue that the 912's have, not sure but we wont use them. No issues out of the netmetal ac or sxt ac.