On 2020-06-06, Todd C Miller <mill...@openbsd.org> wrote: > On Sat, 06 Jun 2020 19:14:28 +0200, Jan Stary wrote: > >> Is the aim to let the ISP know that the iface is down, >> so that it gets set up afresh on boot, as opposed to >> waiting for some PPP keep-alive timeout? > > Basically. It is to work around an issue where the pppoe ethernet > interface goes down during reboot before the pppoe disconnect message > can be sent to the ISP. > > I'm not sure it is needed anymore, though I still have it in my own > rc.shutdown file.
I still have it in mine, not sure if it's needed or not either. I definitely needed it with a previous ISP who didn't seem to do LCP keepalives and hanged onto the session for ages (the alternative for that one was PPPOE_TERM_UNKNOWN_SESSIONS but the kernel-wrangling became annoying). Whether it will help or not depends on the reason for the delay. If it's just poor/slow ISP infrastructure there might be nothing much you can do other than wait for the interface to come up.
