On Thu, Jan 17, 2013 at 9:17 PM, Andrew Shadura <bugzi...@tut.by> wrote: > Hello, > > On Thu, 17 Jan 2013 19:18:55 +0200 > Lauri Tirkkonen <loth...@iki.fi> wrote: > >> ifupdown runs dhclient with the '-1' option, presumably to block >> during startup scripts. > > Not exactly. It was done to make the ifup process more consistent: if > we get an address, we're up, if we don't — we know something's wrong.
Okay, makes sense. > >> In the event that configuration is >> successful, dhclient will daemonize and exit successfully, and >> ifupdown marks the interface configured. However, dhclient will exit >> if at any point in the future renewing the lease fails, and an >> administrator will have to manually ifup the affected interface >> (actually ifdown first, since ifupdown will still think the interface >> is up). I believe this is a regression since squeeze, and it looks >> like #694541 is caused by the same change. > > I believe this may be a bug in dhclient. At least -1 in my > understanding was supposed to affect initial handshake only. Not necessarily, I think -1 might be meant for scenarios where something else is supposed to respawn dhclient if it stops. That's not the case with ifupdown, though. Not sure about this. > > I'd recommend to use ifplugd together with ifupdown in such a setup, > which ensures interfaces are re-configured properly when the link goes > down and up. That kind of works, but if the dhcp server is unreachable for some other reason than the client link being down (eg. actually being down :), it doesn't. > >> As noted in #694541, the change was apparently made to fix #420784, >> but this is a rather nasty side effect. > > Yes, and I don't currently know how to fix this properly until some > core parts of ifupdown are rewritten, which is not going to happen > before the release. > > In the version which is soon to be uploaded if approved by the release > team, I've added tryonce option to switch -1 off if needed. Ok, I guess that's an acceptable workaround. -- Lauri Tirkkonen | +358 50 5341376 | lotheac @ IRCnet -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
