From: Andrew Morton <[EMAIL PROTECTED]> Date: Mon, 23 Apr 2007 13:27:19 -0700
> On Mon, 23 Apr 2007 13:18:10 -0700 (PDT) > David Miller <[EMAIL PROTECTED]> wrote: > > > From: Andrew Morton <[EMAIL PROTECTED]> > > Date: Mon, 23 Apr 2007 13:07:34 -0700 > > > > > The interesting bit is: > > ... > > > I think I saw the same problem maybe 1.5 weeks ago on this machine, but I > > > didn't have time to investigate further. So it's not some recent thing. > > > > My initial reaction is that DNS responses are being lost or dropped > > for some reason. > > Plausible. I'll try booting it with the ethernet unplugged. That won't test the same scenerio. If the network cable is unplugged, ARP responses won't arrive and therefore sendmsg() calls will return with a host unreachable error. The situation you need to recreate is specifically UDP packets getting dropped. The reason I wanted the tcpdump trace is so that we can see whether the problem is UDP packets going out or going in which are being mangled/dropped. You don't need a hub to get a dump. Instead you can run a caching named on some other system, configure your FC6 box to use that system for DNS via /etc/resolv.conf, then run tcpdump on the caching named machine. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
