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Hi Nikolas,

First of all, neutron-dev at lists.opendaylight.org (copied) might be a 
better place to ask networking-odl questions.

It seems that the external network you described is not managed by 
OpenDaylight, so it failed port binding.

You probably want to configure multiple mechanism drivers, say if 
physnet1 is connected by ovs br-xxx on  node-3.domain.tld, you could
run ovs agent on that host and configure bridge_mappings correctly. The 
openvswitch mechanism driver would succeed the port binding.

Thanks,
Zang, Rui

On 8/17/2016 7:38 PM, Nikolas Hermanns wrote:
> Hey Networking-ODL folks,
>
> I just setup a Mirantis 9.0 release together with Opendaylight Beryllium. Using networking-odl v2 I see constantly the error:
> 2016-08-17 11:28:07.927 4040 ERROR neutron.plugins.ml2.managers [req-7e834676-81b4-479b-ad45-fa39f0fabed3 - - - - -] Failed to bind port faeaa465-6f08-4097-b173-48636cc71539 on host node-3.domain.tld for vnic_type normal using segments [{'segmentation_id': None, 'physical_network': u'physnet1', 'id': u'58d9518c-5664-4099-bcd1-b7818bea853b', 'network_type': u'flat'}]
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology [req-7e834676-81b4-479b-ad45-fa39f0fabed3 - - - - -] Network topology element has failed binding port:
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology Traceback (most recent call last):
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology   File "/usr/local/lib/python2.7/dist-packages/networking_odl/ml2/network_topology.py", line 117, in bind_port
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology     port_context, vif_type, self._vif_details)
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology   File "/usr/local/lib/python2.7/dist-packages/networking_odl/ml2/ovsdb_topology.py", line 172, in bind_port
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology     raise ValueError('Unable to find any valid segment in given context.')
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology ValueError: Unable to find any valid segment in given context.
> 2016-08-17 11:28:07.937 4040 ERROR networking_odl.ml2.network_topology
> 2016-08-17 11:28:07.938 4040 ERROR networking_odl.ml2.network_topology [req-7e834676-81b4-479b-ad45-fa39f0fabed3 - - - - -] Unable to bind port element for given host and valid VIF types:
> 2016-08-17 11:28:07.939 4040 ERROR neutron.plugins.ml2.managers [req-7e834676-81b4-479b-ad45-fa39f0fabed3 - - - - -] Failed to bind port faeaa465-6f08-4097-b173-48636cc71539 on host node-3.domain.tld for vnic_type normal using segments [{'segmentation_id': None, 'physical_network': u'physnet1', 'id': u'58d9518c-5664-4099-bcd1-b7818bea853b', 'network_type': u'flat'}]
>
> Looking at the code I saw that you can only bind ports which have a valid segmentation:
> /usr/local/lib/python2.7/dist-packages/networking_odl/ml2/ovsdb_topology.py(151)bind_port()
>     def bind_port(self, port_context, vif_type, vif_details):
>
>         port_context_id = port_context.current['id']
>         network_context_id = port_context.network.current['id']
>         # Bind port to the first valid segment
>         for segment in port_context.segments_to_bind:
>             if self._is_valid_segment(segment): <-------
>                 # Guest best VIF type for given host
>                 vif_details = self._get_vif_details(
>                     vif_details=vif_details, port_context_id=port_context_id,
>                     vif_type=vif_type)
>                 LOG.debug(
>                     'Bind port with valid segment:\n'
>                     '\tport: %(port)r\n'
>                     '\tnetwork: %(network)r\n'
>                     '\tsegment: %(segment)r\n'
>                     '\tVIF type: %(vif_type)r\n'
>                     '\tVIF details: %(vif_details)r',
>                     {'port': port_context_id,
>                      'network': network_context_id,
>                      'segment': segment, 'vif_type': vif_type,
>                      'vif_details': vif_details})
>                 port_context.set_binding(
>                     segment[driver_api.ID], vif_type, vif_details,
>                     status=n_const.PORT_STATUS_ACTIVE)
>                 return
>
>         raise ValueError('Unable to find any valid segment in given context.')
>
> A valid segmentation is defined by:
> [constants.TYPE_LOCAL, constants.TYPE_GRE,
> constants.TYPE_VXLAN, constants.TYPE_VLAN]
>
> The port which I try to bind here is a port on an external network which is flat since we do not have segmentation for external network. Any idea why it is changed that I can bind this port?
>
> BR Nikolas
>
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