Strange network issue in freebsd 8

[Sherin George]

Hello,

Thanks for the reply.

Please see the result of "netstat -rn" command.

============
myserver# netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            XXX.XXX.XXX.241     UGS        62   209247    em0
127.0.0.1          link#3             UH          0        0    lo0
XXX.XXX.XXX.240/29  link#1             U           0        0    em0
XXX.XXX.XXX.242     link#1             UHS         0        0    lo0

Internet6:
Destination                       Gateway                       Flags
Netif Expire
::1                               ::1                           UH
lo0
fe80::%lo0/64                     link#3                        U
lo0
fe80::1%lo0                       link#3                        UHS
lo0
ff01:3::/32                       fe80::1%lo0                   U
lo0
ff02::%lo0/32                     fe80::1%lo0                   U
lo0
=============

Note: I have replaced first three octets.

--
Regards,
Sherin

On Sat, Jan 23, 2010 at 11:57 PM, dacoder <dc at dcoder.net> wrote:

> you don't say what "netstat -rn" shows for a default route.
> +++ Sherin George [23/01/10 14:52 +0530]:
>
>> Hello,
>>
>> 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.
>>
>> /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
>> _______________________________________________
>> freebsd-questions at freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>> To unsubscribe, send any mail to "
>> freebsd-questions-unsubscribe at freebsd.org"
>>
>
> --
>
> regards,
>
> David Coder
> Network Engineer Emeritus, Verio/NTT
> Telluride, CO & Washington, DC
>