<p>Are all vms running same os?</p>
<div class="gmail_quote">On Jan 22, 2013 1:09 AM, "Shachar Shemesh" <<a href="mailto:shachar@shemesh.biz">shachar@shemesh.biz</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>I'll try to summarize in a single
reply.<br>
<br>
You all made some very good suggestions, that are irrelevant for
my case, I'm afraid.<br>
<br>
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.<br>
<br>
Dmesg has nothing.<br>
<br>
I will try and collect stats the next time the problem happens.<br>
<br>
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.<br>
<br>
Also, I'm using kernel 3.2.0-0.BPO.4-amd64 from the Debian squeeze
backports.<br>
<br>
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.<br>
<br>
Actually, that is not entirely true. I did find
<a href="http://bbs.archbang.org/viewtopic.php?id=2435" target="_blank">http://bbs.archbang.org/viewtopic.php?id=2435</a>, but no solution.
I'll keep on searching. It would help had I known how to trigger
the bug...<br>
<br>
Shachar<br>
<br>
On 01/22/2013 02:32 AM, Baruch Shpirer wrote:<br>
</div>
<blockquote type="cite">
<p>Nothing in dmesg? <br>
Which nic hw and fw and driver version + kernel?<br>
Stats on nic<br>
Using nm?</p>
<div class="gmail_quote">On Jan 20, 2013 2:49 PM, "Shachar
Shemesh" <<a href="mailto:shachar@shemesh.biz" target="_blank">shachar@shemesh.biz</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi all,<br>
<br>
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).<br>
<br>
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). <br>
<br>
Bringing the interface down and back up does not help.<br>
<br>
Existing connections remain connected, without a problem.<br>
<br>
The only thing that restores connectivity is rebooting (!!)<br>
<br>
There is nothing out of the ordinary in the routing table.<br>
<br>
Ideas?<br>
<br>
Shachar<br>
<pre cols="72">--
Shachar Shemesh
</pre>
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<br>
<pre cols="72">--
Shachar Shemesh
</pre>
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