On Sun, 26 Apr 2020 at 03:34, Michael Richardson <mcr@xxxxxxxxxxxx> wrote: > > David Balažic <xerces9@xxxxxxxxx> 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)