kvm: change mac address

[natxo]

another problem

I have 2 kvm vm's, both with debian etch. They work fine, but they both get the same mac-address. So when I turn the second on, I lose network connectivity.

Here http://blog.cynapses.org/2007/07/12/qemu-kvm-internal-network-setup/ I get a tip.

This is the original /etc/qemu-server/xxx.conf:

network: model=rtl8139,tap

and I change it to

network: model=rtl8139,macaddr=52:54:00:12:34:57,tap

but then when i stop and start the vm I have no eth0.

how can I solve this? TIA

 

[natxo]

I fixed it for now adding this to eth0 in /etc/network/interfaces:

hwaddress ether 52:54:00:12:34:57

but this should be fixed during the installation of the kvm vm

 

[dietmar]

You need to delete the udev file z25_persistent-net.rules inside the VM if you change the mac address:

> rm /etc/udev/rules.d/z25_persistent-net.rules

We will generate an unique MAC in V1.0 - its already on the TODO list.

- Dietmar