Strange network issue in freebsd 8

[Robert Watson]

On Sat, 23 Jan 2010, Sherin George wrote:

> i am facing some sort of strange network issue in a freebsd server 
> occasionally.
>
> OS: FreeBSD 8.0-RELEASE - amd64
>
> The servers loses network connection once in a few days. I logged into 
> console and verified that network is up. I even restarted network service 
> using following command.

I'd suggest sending this e-mail to freebsd-net; there have been significant 
link layer changes in 8.0, and it's possible this is a side effect (and bug) 
from that.  The appropriate people will pick it up on that list.

Also, I notice you're running 8.0-RELEASE, rather than the latest patch level 
(which included some important security impovements and stability 
improvements); you may want to slide forward using freebsd-update or a manual 
rebuild.  You will need to reboot to pick up some of the improvements.

Robert N M Watson
Computer Laboratory
University of Cambridge

>
> /etc/rc.d/netif restart
>
> Still, it didn't fix.
>
> I checked /var/log/messages, but I am not getting any clue.
>
> ==============
> Jan 19 12:10:20 myserver kernel: GEOM_MIRROR: Device gm0: rebuilding
> provider ad0 finished.
> Jan 19 20:20:23 myserver nfsd[732]: select failed: Interrupted system call
> Jan 19 20:21:07 myserver nfsd[732]: select failed: Interrupted system call
> Jan 23 02:14:33 myserver login: ROOT LOGIN (root) ON ttyv0
> Jan 23 02:19:51 myserver kernel: ifa_del_loopback_route: deletion failed
> Jan 23 02:19:57 myserver kernel: em0: link state changed to DOWN
> Jan 23 02:20:02 myserver kernel: em0: link state changed to UP
> Jan 23 02:29:58 myserver reboot: rebooted by root
> Jan 23 02:29:58 myserver syslogd: exiting on signal 15
> Jan 23 02:31:31 myserver syslogd: kernel boot file is /boot/kernel/kernel
> Jan 23 02:31:31 myserver kernel: Copyright (c) 1992-2009 The FreeBSD
> Project.
> Jan 23 02:31:31 myserver kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988,
> 1989, 1991, 1992, 1993, 1994
> Jan 23 02:31:31 myserver kernel: The Regents of the University of
> California. All rights reserved.
> Jan 23 02:31:31 myserver kernel: FreeBSD is a registered trademark of The
> FreeBSD Foundation.
> Jan 23 02:31:31 myserver kernel: FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08
> UTC 2009
> Jan 23 02:31:31 myserver kernel: root at mason.cse.buffalo.edu:
> /usr/obj/usr/src/sys/GENERIC
> Jan 23 02:31:31 myserver kernel: Timecounter "i8254" frequency 1193182 Hz
> quality 0
> ==============
>
> Network, TCP stack all were up. It was pinging gateway even. But, traceroute
> was not going beyond gateway.
>
> I believe the issue is not related to anything outside server since a reboot
> always fixes the issue.
>
> I will be grateful for any advise that can help me in troubleshooting this
> problem.
>
> --
> Best Regards,
> Sherin
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