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

David Balažic
2020-04-26T12:44:44Z

On Sun, 26 Apr 2020 at 03:34, Michael Richardson <mcr@sandelman.ca> wrote:
>
> David BalaÅ¾ic <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
>
> tcpdump isn't going to be able to see what happens after the interface goes
> down.
> tcpdump -e -v -i eth1 vlan 3902 pppoed
>
> ought to work slightly better, but due to the way vlans are evaluated, might
> not work properly. {as maintainer, it's a major PITA...}

tcpdump -e -v -i eth1 vlan 3902 and pppoed

seems to work, it started it and wait for results. (just "tcpdump -e
-v -i eth1 vlan 3902" shows a lot of packets)