[Bug 629247] Re: Failure to alter VM's MAC address with virsh

[Jerome Potts]

$ 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