[Bug 616064] Re: Broken networking in kvm guests

[Brian Fallik]

Serge,

I've completed (I hope) your suggestions.  Unfortunately neither the new
KVM nor the new kernel seemed to resolve the issue.  More details below
but I'm not sure where to take this from here.  As you point out, it
might be an issue with our environment.  I doubt it's bad software
installed on the host since the host is running bare minimum stock Lucid
- just enough to act as a VM host.  The bad networking switch/equipment
is also a possibility, although I'm a bit confused since I would expect
the NAT configuration to be indistinguishable from any basic machine on
the network since the purpose of NAT is to hide the virtual LAN inside
the host.  Perhaps some information actually leaks from the NAT
abstraction in packets sent out from the host?

For my experiments today, I:
1. switched networking back to NAT and was able to reproduce the issue (svn co depot_tools) again
2. apt-add-repo ppa:serge-hallyn/lucid-kvm-test
3. apt-get update && apt-get upgrade;  this pulled in new versions of kvm, qemu-common, qemu-kvm, as well as a new kernel 2.6.32-24-server as part of the normal Lucid updates
4. rebooted the machine
5. reproduced the issue again
6. apt-add-repository ppa:kernel-ppa/pre-proposed
7. apt-get install linux-headers-server linux-image-server linux-server
8. rebooted the machine
9. reproduced the issue again

I did not test new kernel + stock KVM due to time constraints.

Please let me know if there are any other tests you'd like me to try and
I'll try to schedule more maintenance time.

Thanks,
brian

-- 
Broken networking in kvm guests
https://bugs.launchpad.net/bugs/616064
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to qemu-kvm in ubuntu.