[Fedora-xen] Fedora 7 - missing dummy interfaces

[Daniel P. Berrange]

On Thu, Aug 23, 2007 at 04:17:55PM -0700, David Mueller wrote:
> I'm making progress, but I've run into a couple issues.  I've created
> the following three xml files for the three networks (I'm only
> worrying about one of the virtual machines now; once I get it working
> I should be able to replicate it for the other):
> 
> <network>
>   <name>emu0</name>
>   <uuid>8d18febd-e295-4e67-9373-a8b2a5855e60</uuid>
>   <bridge name='emubr0' stp='on' forwardDelay='0' />
>   <ip address='128.10.0.253' netmask='255.255.255.0' />
> </network>
> 
> <network>
>   <name>emu2</name>
>   <uuid>8d18febd-e295-4e67-9373-a8b2a5855e62</uuid>
>   <bridge name='emubr2' stp='on' forwardDelay='0' />
> </network>
> 
> <network>
>   <name>emu3</name>
>   <uuid>8d18febd-e295-4e67-9373-a8b2a5855e63</uuid>
>   <bridge name='emubr3' stp='on' forwardDelay='0' />
> </network>
> 
> emu2 and emu3 networks I didn't assign an IP address to since the host
> doesn't need one; they will be exclusively for VM to VM communcation.
> emu0 (and in the future emu1) will be used for communication between
> host and VM -- each will be a different subnet.
> 
> 
> The first problem is that I can't get the guest VM to communicate with
> the host.  I assign an address to the interface with this command:
> 
> # /sbin/ifconfig eth0 128.10.0.1/24 up
> 
> Then I attempt to ping the host, but get an error message Destinamtion
> Host Unreachable.  The same happens if I try to ping the guest from
> the host.

I suspect this is due to the next problem you mention...

> I did notice an additional oddity.  While the three interfaces all
> show their correct MAC addresses in the Hardware tab of the Virtual
> Machine Details tab, if I run ifconfig within the guest, all three
> show the same address, 1E:11:11:11:11:12 (which should be eth2's MAC
> address).

Is this with QEMU, or KVM ?  Ie is it running /usr/bin/qemu-kvm, or the
regular qemu binary. There was a bug where all NICs got the same MAC 
address

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=247641

IIRC we've only fixed KVM so far.

Dan.
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