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<div class="">I’m doing some testing/PoC on an RDO Ocata CentOS7 setup and everything has gone well with the exception of configuring multiple VLANs.  </div>

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<div class="">After following the configuration detailed at <a href="https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html/networking_guide/sec-connect-instance#Using-VLAN-Provider-Networks" class="">https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html/networking_guide/sec-connect-instance#Using-VLAN-Provider-Networks</a> ,

 neutron errors out with the following:</div>

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<div class="">$ neutron net-create 1_network \</div>

<div class="">                        --provider:network_type vlan \</div>

<div class="">                        --router:external true \</div>

<div class="">                        --provider:physical_network extnet \</div>

<div class="">                        --provider:segmentation_id 1 --shared</div>

<div class="">Unable to create the network. The VLAN 1 on physical network extnet is in use.</div>

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extnet is mapped to the OVSbridge br-ex, which has a physical interface that’s trunked to all of the available VLANs..trying this command on the other available VLANs works, but 1 and 2 (the ones I want to test on) always fails.  Is there anything obvious to

 try on the system itself or is this more likely a network issue?

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<div class="">Thanks much, </div>

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