On 2020-04-22 13:45, David Balažic wrote: > Hi! > > I have a router running openwrt connected to a GPON ONT, running a > PPPoE connection (hw details below). This looks to be (possibly) a PPPoE failure, though there's nothing interesting in the log messages provided. If there were an interesting log message, it would almost certainly come somewhere (perhaps even *minutes*) before that initial "Modem hangup" message. The definitive test would be to run a packet capture on the Ethernet interface itself (*not* on the PPP interface) with something like Wireshark and determine what happens in the lead-up to the failure. I'd expect the system is just getting a stray PADT from the peer, if it's some kind of PPPoE problem. If it isn't, then possibly it's something else. I think that the last time I looked at the PPPoE implementation on Linux it was a bit hokey -- it ran PPP over a pty pair and then decoded the framing in user space and wrote it back out over Ethernet using PPPoE. I hope it's not still like that, as I haven't looked at it in years, but it may well be. An internal error in that logic could also cause a "hangup" message, although hopefully along with some kind of system log about a core file as well. (The implementation on other platforms, such as Solaris, was a bit more solid.) -- James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx>
