Massive PPPoE Drops

What could cause massive PPPoE drops on wlan interface, even wlan is just fine. I have SXT5 Lite connected to Ubnt Rocket M5 AP, both with latest firmwares. Ubnt devices connected to Ubnt AP work just fine, but Mikrotik is dropping PPPoE all the time. Like I said, wireless connection is just fine, signal around -60 dbm, ccq around 98, rx and tx. What I did found that there wasn’t no traffic at device at that time, when connections get dropped. Does that play some role?
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Try to connect with wire only. If OK, then see what is a problem with wireless. Solve the problem consistently.

Can’t connect with wire, because this is client’s CPE. I have one other client on same AP, same signal quality, same fw, but quite less pppoe drops in last 12h. 10 vs. 100. But that other client with less drops had much more traffic. So I wanted to know, are those drops somehow related to traffic. When pppoe interface is at idle, drops are very often. Is that normal behaviour?

Not sure this is relevant with wireless, but is your MTU set correctly on the pppoe-client interface?

Yes, MTU is fine. Now, I’ve left ping to my gateway for two hours, more than 7500 packets sent, just two dropped and pppoe didn’t drop at any point. So, it has something to do with traffic.

Definitely has something related to traffic and idle state
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Fixed problem with netwatch. I’ve put netwatch on each 30s to ping 8.8.8.8. Now PPPoE session is active for 14h and counting.

You should never put an server IP you don’t own and explicitly disallows such an shame ping flood..

I know. I’ve put last night one server in my network, just for this. Also, put one minute netwatch. Still holds pppoe connection. It’s workaround, but it’s better than 100 connection per user each day.