One more thing I noticed: the packet count for eth1 is much higher than for eth1.3902: eth1 Link encap:Ethernet HWaddr C4:XX:XX:XX:XX:ED inet6 addr: fe80::c6xx:xxff:fexx:xxed/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:23147175 errors:0 dropped:0 overruns:3 frame:0 TX packets:12334230 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3553425618 (3.3 GiB) TX bytes:4237688514 (3.9 GiB) Interrupt:5 eth1.3902 Link encap:Ethernet HWaddr C4:XX:XX:XX:XX:ED inet6 addr: fe80::c6xx:xxff:fexx:xxed/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:682037 errors:0 dropped:0 overruns:0 frame:0 TX packets:91218 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:373700490 (356.3 MiB) TX bytes:26176360 (24.9 MiB) As if the eth1.3902 is somehow reset every now and then. I'll keep my eye on it. Also: the IPv6 address (the part derived from hwaddr) starts with c6 instead of c4 like the actual hw address. Is that normal? On Thu, 23 Apr 2020 at 12:37, David Balažic <xerces9@xxxxxxxxx> wrote: > > Some more info: > > - the connect time is random: > # logread | grep "Connect time" > Wed Apr 22 16:42:18 2020 daemon.info pppd[7960]: Connect time 1742.8 minutes. > Wed Apr 22 19:13:03 2020 daemon.info pppd[9563]: Connect time 150.7 minutes. > Thu Apr 23 09:38:31 2020 daemon.info pppd[9884]: Connect time 865.5 minutes. > > > > - the assigned IP address is different on each connection > > > - logs > On Thu, 23 Apr 2020 at 00:00, James Carlson <carlsonj@xxxxxxxxxxxxxxx> wrote: > > > > 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. > > Nothing there: > > Thu Apr 23 08:59:02 2020 daemon.info hostapd: wlan0: STA > 58:XX:XX:XX:XX:b9 IEEE 802.11: deauthenticated due to inactivity > (timer DEAUTH/REMOVE) > Thu Apr 23 09:38:31 2020 daemon.notice pppd[9884]: Modem hangup > > I'll try packet capture next. > > Regards, > David