Cannot use a provider network for VM creation

[Pushkar Acharya]

Neutron server is configured with VMware NSX DVS plugin. vCenter has a distributed switch (DSwitch) which contains a port group DPortGroup. Created a provider network as -

neutron net-create --provider:network_type=portgroup --provider:physical_network=DPortGroup DPortGroup
neutron subnet-create --allocation-pool start=10.4.249.0,end=10.4.249.255 --disable-dhcp DiscoveredPortGroup 10.4.0.0/16

When this network is used for creating instances, nova compute is unable to find the port group on vCenter and instance creation fails. Following error is seen in the nova logs -

2018-01-26 20:07:33.630 TRACE nova.compute.manager [instance: 02bbe6cf-cf03-43f5-9f40-19a60cf121a2] network_ref = _get_neutron_network(session, cluster, vif)
2018-01-26 20:07:33.630 TRACE nova.compute.manager [instance: 02bbe6cf-cf03-43f5-9f40-19a60cf121a2] File "/opt/nova/lib/python2.7/site-packages/nova/virt/vmwareapi/vif.py", line 148, in _get_neutron_network
2018-01-26 20:07:33.630 TRACE nova.compute.manager [instance: 02bbe6cf-cf03-43f5-9f40-19a60cf121a2] raise exception.NetworkNotFoundForBridge(bridge=network_id)
2018-01-26 20:07:33.630 TRACE nova.compute.manager [instance: 02bbe6cf-cf03-43f5-9f40-19a60cf121a2] NetworkNotFoundForBridge: Network could not be found for bridge df88fc72-013e-4a95-9915-0e4555008fc5