2012-09-16 21:30:05    DEBUG [quantum.agent.linux.utils] Running command: sudo /usr/bin/quantum-rootwrap /etc/quantum/rootwrap.conf ip link set qg-3c2e3ef9-c3 address fa:16:3e:06:1b:db
2012-09-16 21:30:05    DEBUG [quantum.agent.linux.utils]
Command: ['sudo', '/usr/bin/quantum-rootwrap', '/etc/quantum/rootwrap.conf', 'ip', 'link', 'set', 'qg-3c2e3ef9-c3', 'address', 'fa:16:3e:06:1b:db']
Exit code: 1
Stdout: ''
Stderr: 'Cannot find device "qg-3c2e3ef9-c3"\n'
2012-09-16 21:30:05    ERROR [quantum.agent.l3_agent] Error running l3_nat daemon_loop
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 175, in daemon_loop
    self.do_single_loop()
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 228, in do_single_loop
    self.process_router(ri)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 281, in process_router
    self.external_gateway_added(ri, ex_gw_port, internal_cidrs)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 360, in external_gateway_added
    prefix=EXTERNAL_DEV_PREFIX)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/interface.py", line 141, in plug
    device.link.set_address(mac_address)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/ip_lib.py", line 171, in set_address
    self._as_root('set', self.name, 'address', mac_address)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/ip_lib.py", line 158, in _as_root
    kwargs.get('use_root_namespace', False))
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/ip_lib.py", line 45, in _as_root
    namespace)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/ip_lib.py", line 56, in _execute
    root_helper=root_helper)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/linux/utils.py", line 55, in execute
    raise RuntimeError(m)
RuntimeError:
Command: ['sudo', '/usr/bin/quantum-rootwrap', '/etc/quantum/rootwrap.conf', 'ip', 'link', 'set', 'qg-3c2e3ef9-c3', 'address', 'fa:16:3e:06:1b:db']
Exit code: 1
Stdout: ''
Stderr: 'Cannot find device "qg-3c2e3ef9-c3"\n'