PPPOE on upload disconnecting!

I have problem on RB2011UAS-2HnD and PPPOE connection, all working stable until I start just one file upload and that using all available bandwidth and that is around 1Mbps, uploading going normal few minutes and than PPPOE connection was terminated with this log on MT:
pppoe-out1: terminating… - disconnected
and connection back in few seconds upload continue but again will be terminated in few minutes…

This is VDSL connection, ZTE modem is in bridge mode and DSL connection is stable without errors but pppoe is not if I using all BW!

For me look like pppoe client if I using all available bandwidth can not ping pppoe server or something like that and than server terminate it, look like my ISP have hard limit for BW but PPPOE ping must have some priority or something like that, I am not expert but this is not normal situation…

Somebody know how I can fix this?

I am using latest stable MT firmware!

Thanks.

If your ISP has a hard limit, have you tried applying a queue on the pppoe interface which is just less than the hard limit (test to find it). Then you can’t exceed the limit.

Yes, I thinking to do that but must be some more elegant solution because this is stupid problem…

If its running v7, use a cake queue that should (hopefully) allow you to near fill the uplink, while also giving everything else in your network a bit of bandwidth rather than being starved out because of the fat upload.

V6, probably a pcq queue.

Look like pcq queue just for upload doing good job in this case!

Thanks.