$ virsh dumpxml myvm | grep address
<mac address='52:54:00:fa:c8:17'/>
$ virsh detach-interface myvm bridge --mac '52:54:00:fa:c8:17'
error: operation failed: network device cannot be detached - device state
missing
$ virsh attach-interface myvm bridge br0 --mac '00:16:3e:10:34:31'
Interface attached successfully
$ virsh dumpxml myvm | grep address
<mac address='52:54:00:fa:c8:17'/>
<mac address='00:16:3e:10:34:31'/>
$ virsh detach-interface myvm bridge --mac '52:54:00:fa:c8:17'
error: operation failed: network device cannot be detached - device state
missing
$ virsh detach-interface myvm bridge --mac '00:16:3e:10:34:31'
Interface detached successfully
$ virsh net-list --all
Name State Autostart
-----------------------------------------
$ ping -c1 myvm
PING myvm.inside.mydomain.net (10.10.10.38) 56(84) bytes of data.
64 bytes from myvm.inside.mydomain.net (10.10.10.38): icmp_seq=1 ttl=64
time=12.7 ms
--- myvm.inside.mydomain.net ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 12.718/12.718/12.718/0.000 ms
$ virsh shutdown myvm
Domain myvm is being shutdown
$ virsh dumpxml myvm
<domain type='kvm'>
<name>myvm</name>
<uuid>594c38f9-bf5f-7cf2-53f4-d6d1d6fa0da3</uuid>
<memory>524288</memory>
<currentMemory>524288</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='x86_64' machine='pc-0.12'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/opt/vm/myvm/tmpQPc9uI.qcow2'/>
<target dev='hda' bus='ide'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:fa:c8:17'/>
<source bridge='br0'/>
<target dev='vnet7'/>
<model type='virtio'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target port='0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
</video>
</devices>
</domain>
$
The problem is the inability to remove the original MAC address of a VM,
whereas removing a 2nd MAC that was added with a "virsh attach-
interface" works. Why is that?
--
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to libvirt in ubuntu.
https://bugs.launchpad.net/bugs/629247
Title:
Failure to alter VM's MAC address with virsh
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