Hello,
I have very strange question. How is this possible. My radio is working on 2499Mhz
but for a year and from 2 days I have problems. This is the output when I scan. Can
somebody explain me what is this on 2494Mhz and can it be the reason for the problem (“extensive data loss” and “class 2 frame received (6)”)
Flags: A - active, B - bss, P - privacy, R - routeros-network, N - nstreme
ADDRESS SSID BAND FREQ SIG RADIO-NAME
AB RN 00:02:6F:11:11:11 ssid1 2.4ghz-b 2494 -74 00026F111111
AB RN 00:02:6F:11:11:11 ssid1 2.4ghz-b 2499 -74 00026F111111
The problem started when I start to use 2.9.6
Did you try first to change the freq. ?
I had the same problem “extensive data loss” and “class 2 frame received (6)”, but I didn’t look in the registration table menu, soo I don’t know did I have the same behaviour.
I’ve tried everything. With link 2.9.6(5213) <~~~~~~> (5213)2.8.21
i have “extensive data loss” on random periods. The signal is good (-70dBm) and there are no radios working on the frequencies I am using. Before the update from 2.8.22 to 2.9.6 (one year) everything worked fine. Please help. Or I must downgrade 
From all the posts i’ve read I think there is only one solution for this problem when using 2.4Ghz - downgrade to 2.8.x
From all the posts i’ve read I think there is only one solution for this problem when using 2.4Ghz - downgrade to 2.8.x
Many hours observation and here is some conclusion. Disconnect is happening only when Mirkotik changes data rates.
for example: from 5.5Mbps to 11Mbps
I’m sure in that (more than 15 hours )
RouterOS 2.9.6, Atheros 5213, frequency 2.4Ghz
Every 3-4 hours I must change frequecies to resolve the problem 
I’m definitely going to downgrade the box to 2.8.2x
Why not try 2.9.10 before downgrading?