Parts of the internet keep on disappearing on me

[Baruch Shpirer]

Are all vms running same os?
On Jan 22, 2013 1:09 AM, "Shachar Shemesh" <shachar at 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" <shachar at 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 at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
> _______________________________________________
> Linux-il mailing listLinux-il at cs.huji.ac.ilhttp://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
>
> --
> Shachar Shemesh
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cs.huji.ac.il/pipermail/linux-il/attachments/20130122/bbe57913/attachment.html>