Re: FAQ on linux-kvm.org has broken link

[Stefan Hajnoczi <stefanha@gmail.com>]

On Tue, Jul 30, 2013 at 03:18:53AM +0200, folkert wrote:
> The link at:
> http://www.linux-kvm.org/page/FAQ#My_guest_network_is_stuck_what_should_I_do.3F
> pointing to:
> http://qemu-buch.de/cgi-bin/moin.cgi/QemuNetwork
> is broken: it gives a "Internal server error" message.
> 
> Please someone point me to the correct location as I'm struggeling with
> a VM losing connectivity all the time.

Hi Folkert,
I have updated the wiki to point to
http://qemu-project.org/Documentation/Networking.  The original link
seems to be down.

If you keep losing network connectivity you may have a MAC or IP address
conflict.  The symptom is that network traffic is intermittent - for
example, ping might work but a full TCP connection does not.

This happens when two guests are configured with identical MAC or IP
addresses on the same bridge or subnet.  They will "fight" over the MAC
or IP address and you will not be able to reliably communicate with
those guests.

The tool for solving networking issues is often tcpdump.  Run tcpdump
inside the guest to verify it is receiving traffic or investigate a
failed connection.

Run tcpdump on the host - especially if you are using -netdev tap - to
inspect the traffic being forwarded on behalf of the guest.

If you let libvirt set up networking for you all should be fine.  If you
run qemu manually or customized the domain XML, then it's possible you
have a misconfiguration.  Feel free to post the details so someone can
help you.

Stefan