Re: PPPoE Modem hangup after random time - how to debug?

David Balažic
2020-04-23T11:12:48Z

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@gmail.com> 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@workingcode.com> 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