while i give the following command in controller node: #nova network-create demo-net --bridge br100 --multi-host T --fixed-range-v4 172.16.5.87/22

nova network-create ERROR: The server has either erred or is incapable of performing the requested operation. (HTTP 500)

*/etc/nova/nova-api.log*

015-01-22 16:12:03.043 1654 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:03.269 1649 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:07.055 1654 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:08.218 1655 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:08.219 1655 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:12.231 1655 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:23.105 1651 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:23.105 1651 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:27.112 1651 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:33.277 1649 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:33.277 1649 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:37.082 1654 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:37.083 1654 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:37.289 1649 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:41.095 1654 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:42.258 1655 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:42.259 1655 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:12:46.269 1655 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:12:57.139 1651 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:12:57.140 1651 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying reconnect for 1.0 seconds...
2015-01-22 16:13:01.146 1651 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: Socket closed. Trying again in 30 seconds.
2015-01-22 16:13:07.316 1649 INFO oslo.messaging._drivers.impl_rabbit [-] Reconnecting to AMQP server on controller:5672
2015-01-22 16:13:07.317 1649 INFO oslo.messaging._drivers.impl_rabbit ...