Comment 2 for bug 1223859

I have same problem in version Grizzly 2013.1.3, this bug is also impact interface-detach. The old interface can't be deleted after attached new interface.

Error in log:

2013-10-14 11:32:41.621 ERROR nova.openstack.common.rpc.amqp [req-a7d5449c-482a-43c2-bc7c-49c7877ad3a5 5191001b9c2a4021a3eb9658067e0018 06a9bfcdbf7940158972942179a852b9] Exception during message handling
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp Traceback (most recent call last):
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py", line 430, in _process_data
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp rval = self.proxy.dispatch(ctxt, version, method, **args)
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/dispatcher.py", line 133, in dispatch
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp return getattr(proxyobj, method)(ctxt, **kwargs)
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3069, in detach_interface
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp "attached") % locals())
2013-10-14 11:32:41.621 11476 TRACE nova.openstack.common.rpc.amqp PortNotFound: Port a80e2a48-aa4b-45c9-93bc-dc22374aeefb is not attached