I have big network I use all kinds of RB 433Ah,411AH,600,800 etc etc...
don't really remember but I think the problem start after 5.9 ver.. have a real problem every day on different rb's interfaces stop receiving or transmitting any data and the problem is increasing
like today on this bord interface wlan
Ill hope u'll get the picture
this is graph of wlan R52Hn mounted on a RB411AH stop working its like all clients are connected but no RX/TX data
this happen also on some Rbords on ethernet ports, RB is running no hang ups when I connect in from wireless side I see that there is no passing any data from ethernet port
like this ether1 on RB493AH
in this case I was lucky I have access from wlan side
just I have to do disable enable interface or reboot RB and everything is back to normal
I cant monitor every wlan interface on my network 24h a day
also when it happen to ethernet port I have to do manual reboot because I don have always wlan access
anyway just for info on all RB I dont use any firewall most of all interfaces are just in bridge.
Most of all RB's are with 5.13 or 5.14 ver.
Pls for some advice