I have an ADSL over ATM connection (bonded DSL) from ISP to a ZyXel modem/router provided by my ISP. For over a year I have successfully set the ZyXel to bridge mode and used the stock firmware of a Netgear R7800. However, I have terrible bufferbloat through my ISP and the QoS on the Netgear wasn't cutting it.
About a week or two ago, I switched to OpenWrt (the latest stable @hnyman build) and turned on cake and piece of cake SQM management. My Ds and Fs on dslreports.com speedtest became As. I would (every day or two) lose PPPoE connection, but it would work fine again after restarting WAN interface. Otherwise OpenWrt worked great.
However, this past Friday, my connection shut down and has been unusable all weekend. I assumed it was a hardware line problem, but my ISP reported that it was fine. To test, I disconnected the Netgear and turned on the routing function of the ZyXel and the connection is perfect (insofar as it is, decent throughput results but Fs on bufferbloat). As soon as I put the ZyXel in Bridge mode and reconnect my Netgear with OpenWrt, it refuses the PPPoE connection as soon as the UI shows a MAC address for the WAN interface (PEER_DEAD, sometimes NEGOTIATION_FAILED after restarting interface, mostly simply connection failed).
Given that this router-modem worked for a year stock, and worked for a couple weeks with openWrt, what should I do to diagnose from here? Do some ISPs not like something my openWrt QoS (or whatever) is doing and maybe blocked it?
Thanks all for the help. I very much want to keep OpenWrt with Piece of Cake... when it worked, it made my DSL connection fantastic!