Are all vms running same os? On Jan 22, 2013 1:09 AM, "Shachar Shemesh" <shac...@shemesh.biz> wrote:
> I'll try to summarize in a single reply. > > You all made some very good suggestions, that are irrelevant for my case, > I'm afraid. > > This is not the NIC. It's not its hardware or driver or firmware. > Otherwise, the virtual machine would have experienced the same problem when > bridging, and it doesn't. > > Dmesg has nothing. > > I will try and collect stats the next time the problem happens. > > I am using network manager, but I highly doubt it is part of the problem. > The next time this problem happens, I'll try to take it down and set up the > networking parameters manually, see if it makes any difference. As far as I > can remember, I tried it and it didn't. I did try restarting nm, the > network driver and the wireless switch that is the gateway (yes, all > simultaneously), and that did not cause the problem to go away. > > Also, I'm using kernel 3.2.0-0.BPO.4-amd64 from the Debian squeeze > backports. > > At work I ran into a similar problem in the past. There it was also a 3.2 > kernel, compiled from the vanilla tree (a couple of patches, both seem > totally irrelevant). There the symptoms were similar, but there the TCP/IP > stack would not receive any responses at all. DHCP would also fail. Running > tcpdump, however, would show the packets arriving. There, too, the only way > I found of resetting the problem was to reset the machine. I am beginning > to suspect this is a kernel bug. It strikes me as weird, however, that it > would happen to me on two distinct machines, and yet not show up on Google. > > Actually, that is not entirely true. I did find > http://bbs.archbang.org/viewtopic.php?id=2435, but no solution. I'll keep > on searching. It would help had I known how to trigger the bug... > > Shachar > > On 01/22/2013 02:32 AM, Baruch Shpirer wrote: > > Nothing in dmesg? > Which nic hw and fw and driver version + kernel? > Stats on nic > Using nm? > On Jan 20, 2013 2:49 PM, "Shachar Shemesh" <shac...@shemesh.biz> wrote: > >> Hi all, >> >> I have a really strange problem. On one of the computers in my house, >> parts of the internet keep on disappearing. Sometimes half the internet is >> inaccessible, and sometimes it's just a couple of sites (google is a >> favorite for this problem). >> >> This is, most definitely, NOT a router or ISP problem. Other computers on >> the same network are working fine. A virtual machine connecting via a >> bridge on the same network is working fine (via NAT it does not). >> >> Bringing the interface down and back up does not help. >> >> Existing connections remain connected, without a problem. >> >> The only thing that restores connectivity is rebooting (!!) >> >> There is nothing out of the ordinary in the routing table. >> >> Ideas? >> >> Shachar >> >> -- >> Shachar Shemesh >> >> >> _______________________________________________ >> Linux-il mailing list >> Linux-il@cs.huji.ac.il >> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >> >> > > _______________________________________________ > Linux-il mailing > listlinux...@cs.huji.ac.ilhttp://mailman.cs.huji.ac.il/mailman/listinfo/linux-il > > > > -- > Shachar Shemesh > >
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