I am running Newton on Ubuntu 16.04.

I did Install everything properly and I haven't had any issues during installation neutron.

When I am trying to add network using horizon dashboard or using command line I have an error:

Error: Failed to create network "Network 1": Unable to create the network. 
No tenant network is available for allocation. 
Neutron server returns request_ids: ['req-c1ef9fb9-2b9f-467b-9f54-e597cadd1a3f']

I was trying to add to Neutron - neutron.conf

core_plugin = neutron.plugins.ml2.plugin.Ml2Plugin
service_plugins=neutron.services.l3_router.l3_router_plugin.L3RouterPlugin

Then Restart services

here is some of mine logs

neutron ext-list
+---------------------------+---------------------------------+
| alias                     | name                            |
+---------------------------+---------------------------------+
| default-subnetpools       | Default Subnetpools             |
| availability_zone         | Availability Zone               |
| network_availability_zone | Network Availability Zone       |
| binding                   | Port Binding                    |
| agent                     | agent                           |
| subnet_allocation         | Subnet Allocation               |
| dhcp_agent_scheduler      | DHCP Agent Scheduler            |
| tag                       | Tag support                     |
| external-net              | Neutron external network        |
| flavors                   | Neutron Service Flavors         |
| net-mtu                   | Network MTU                     |
| network-ip-availability   | Network IP Availability         |
| quotas                    | Quota management support        |
| provider                  | Provider Network                |
| multi-provider            | Multi Provider Network          |
| address-scope             | Address scope                   |
| subnet-service-types      | Subnet service types            |
| standard-attr-timestamp   | Resource timestamps             |
| service-type              | Neutron Service Type Management |
| extra_dhcp_opt            | Neutron Extra DHCP opts         |
| standard-attr-revisions   | Resource revision numbers       |
| pagination                | Pagination support              |
| sorting                   | Sorting support                 |
| security-group            | security-group                  |
| rbac-policies             | RBAC Policies                   |
| standard-attr-description | standard-attr-description       |
| port-security             | Port Security                   |
| allowed-address-pairs     | Allowed Address Pairs           |
| project-id                | project_id field enabled        |
+---------------------------+---------------------------------+

openstack network agent list:

http://paste.openstack.org/show/604908/

content of neutron.conf:

http://paste.openstack.org/show/604910/

neutron-server.service - OpenStack Neutron Server && ps -ef | grep neutron-server:

http://paste.openstack.org/show/604907/