Date: Mon, 3 Aug 2009 18:53:04 -0400 From: Glen Barber <glen.j.barber@gmail.com> To: Joel Dahl <joel@vnode.se> Cc: freebsd-questions@freebsd.org Subject: Re: Weird networking issue Message-ID: <4ad871310908031553i7c69708fv9d162514816c3e10@mail.gmail.com> In-Reply-To: <4A7753A0.7040006@vnode.se> References: <4A7753A0.7040006@vnode.se>
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On Mon, Aug 3, 2009 at 5:16 PM, Joel Dahl<joel@vnode.se> wrote: > Yesterday I noticed something weird with one of my mail servers (FreeBSD > 7.2), which is located far away from me. =A0At first I thought it was my = mail > client that was misbehaving since a couple of mails that I retrieved from > the server looked...odd. =A0Characters were missing, and the mail headers= were > sometimes (perhaps 1 out of 100 mails) sort of scrambled. > > This server isn't doing anything really useful, except handling a few mai= ls > every day. =A0No load at all and it has been running for a few months wit= hout > any problems. > > Anyway, after some time I realized that Thunderbird probably wasn't the > problem. =A0I discovered that ssh connections suddenly dropped (seems ran= dom) > when I was connected to the server. =A0Often with messages like: > > Received disconnect from x.x.x.x: 2: Bad packet length 3365265859. > > I tried to ping it and I constantly got 5-15% packet loss. =A0The same > symptoms are there if I connect to it from other places, so my home > connection isn't the problem. =A0I get 0 packet loss if I ping the gatewa= y > which the server is behind from my home connection. > > Anyway, while I was connected to the machine (and scratching my head) I d= id > a csup from the server to fetch ports and other stuff, but that failed ev= ery > time, with different messages: > > 1st try: > > =A0Edit ports/Mk/bsd.port.mk > =A0Add delta 1.625 2009.08.03.15.36.58 miwi > =A0Edit ports/UPDATING > =A0Add delta 1.845 2009.08.03.19.08.48 dougb > csup: inflate: invalid stored block lengths > > 2nd try: > > =A0Edit ports/devel/libvc/Makefile > =A0Add delta 1.11 2009.08.02.19.33.28 mezz > =A0Edit ports/devel/libytnef/Makefile > =A0Add delta 1.6 2009.08.02.19.33.28 mezz > Receiver: Protocol error > > 3rd try: > > Edit ports/devel/p5-threads-shared/distinfo > =A0Add delta 1.4 2009.07.22.17.25.14 pgollucci > =A0Edit ports/devel/p5-usb/pkg-plist > =A0Add delta 1.3 2009.07.30.23.04.41 pgollucci > csup: inflate: invalid distance too far back > > Ok. =A0So something is messed up. > > Checked my other server (located at the same place) to see if there were = any > problems (it is running VMware ESXI with 4 virtual machines, all running > FreeBSD 7.2.), but all of the virtual hosts were fine. =A0No packet loss,= no > ssh problems, no nothing. =A0This server is connected to the same switch = and > behind the same gateway. =A0So are also a bunch of Windows servers. =A0No= ne of > them have any problems. > > Checked the logs on my mail server to see if there were anything weird...= and > the logs were filled with this: > > arp: x.x.x.x moved from 00:16:c7:24:69:ae to 00:16:cf:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:cf:24:69:ae to 00:16:c7:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:c7:24:69:ae to 00:16:cf:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:cf:24:69:ae to 00:16:c7:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:c7:24:69:ae to 00:16:cf:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:cf:24:69:ae to 00:16:c7:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:c7:24:69:ae to 00:16:cf:24:69:ae on bge0 > arp: x.x.x.x moved from 00:16:cf:24:69:ae to 00:16:c7:24:69:ae on bge0 > > x.x.x.x is my gateway which all my servers are behind. =A0These messages > started yesterday, about the same time that the problems appeared. > > Any ideas? :-) > I have 2: 1.) Bad NIC 2.) Bad CPU A while back, I found out I had a bad CPU after replacing everything else on the machine -- I would still receive CRC mismatch errors with portsnap(8). The NIC is more probable IMHO, but both should be suspect here. --=20 Glen Barber
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