From owner-freebsd-net@FreeBSD.ORG Wed Jun 4 19:41:08 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4DCA81065671 for ; Wed, 4 Jun 2008 19:41:08 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail17.syd.optusnet.com.au (mail17.syd.optusnet.com.au [211.29.132.198]) by mx1.freebsd.org (Postfix) with ESMTP id CAC7D8FC12 for ; Wed, 4 Jun 2008 19:41:07 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from server.vk2pj.dyndns.org (c122-106-215-175.belrs3.nsw.optusnet.com.au [122.106.215.175]) by mail17.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id m54Jf4XJ031653 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 5 Jun 2008 05:41:06 +1000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.2/8.14.2) with ESMTP id m54Jexx5075703; Thu, 5 Jun 2008 05:40:59 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.2/8.14.2/Submit) id m54JexdZ075702; Thu, 5 Jun 2008 05:40:59 +1000 (EST) (envelope-from peter) Date: Thu, 5 Jun 2008 05:40:59 +1000 From: Peter Jeremy To: Izwan Mohd Message-ID: <20080604194059.GE1028@server.vk2pj.dyndns.org> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Wfe1KbQWcwuymTys" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.17 (2007-11-01) Cc: freebsd-net@freebsd.org Subject: Re: network keep droping X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Jun 2008 19:41:08 -0000 --Wfe1KbQWcwuymTys Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2008-Jun-05 02:37:14 +0800, Izwan Mohd wrote: >I have being encountering a weird problem on my freebsd 6 , one of my remo= te >machine being down frequently lately for no particular reason, when I go to >the remote site to check then machine it was in good running condition but >no network, it even can't ping the server on the same subnet, the only way >to restore it back is by running: > >route -n flush && /etc/netstart First question would be: What has changed? Are you able to identify when the problem occurs? This might let you associate the problem with an internal cronjob or network activity. What does ifconfig report? Does the interface look normal or is it reporting something strange? Is the switch reporting any events associated with your port? What do you see if you tcpdump the interface whilst its not working? Are you seeing normal subnet broadcast traffic? Unicast traffic directed to your box? Outgoing traffic from your box? Does physically unplugging and re-connecting the network cable correct the problem? Are you able to (temporarily) use a different swichport or NIC? Finally, more detail on your configuration might trigger someone's memory: What version of 6.x? What NIC/MII? How much memory? What network features (vlan, firewall, dummynet, netgraph, carp, ...) are you using? --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --Wfe1KbQWcwuymTys Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkhG78sACgkQ/opHv/APuIfcUgCgg0+Ip71jGxW/JhIyqsEccgMB V+gAnjF1EjtvyiFmpc0LiZVox/wFUAxM =LMMU -----END PGP SIGNATURE----- --Wfe1KbQWcwuymTys--