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

Guillaume Nault
2020-04-24T15:44:59Z

On Fri, Apr 24, 2020 at 03:47:34PM +0200, David Balažic wrote:
> On Thu, 23 Apr 2020 at 21:36, David Balažic <xerces9@gmail.com> wrote:
> >
> > OK, more data:
> > I started tcpdump with the -e option as suggested on openwrt forum:
> > tcpdump -e -v -i eth1.3902 pppoed
> >
> > on disconnect, this was logged (times are UTC):
> >
> >
> > tcpdump: listening on eth1.3902, link-type EN10MB (Ethernet), capture
> > size 262144 bytes
> > 18:23:09.204991 a4:7b:2c:9e:c7:44 (oui Unknown) > 44:4e:6d:fd:c7:39
> > (oui Unknown), ethertype PPPoE D (0x8863), length 97: PPPoE PADO
> > [Service-Name] [AC-Name "SIMB_TABOR_BNG1"] [Host-Uniq
> > 0x44************long_number******************************AA]
> > [AC-Cookie ".5b************v"]
>
> Isnt this strange? The dst addr is not my router or any other known.
> Also the Host-Uniq value is different.
> As if is traffic meant for someone else.
>
You're probably not supposed to receive this frame, but a PADO
shouldn't disconnect you. If that was a PADT, then yes, it'd be a good
suspect.