The Networking service provides a purge mechanism to delete the
following network resources for a project:

• Networks
• Subnets
• Ports
• Router interfaces
• Routers
• Floating IP addresses
• Security groups

Typically, one uses this mechanism to delete networking resources for
a defunct project regardless of its existence in the Identity
service.

Usage

1. Source the necessary project credentials. The administrative
   project can delete resources for all other projects. A regular project
   can delete its own network resources and those belonging to other
   projects for which it has sufficient access.

2. Delete the network resources for a particular project.

   $ neutron purge PROJECT_ID

   Replace PROJECT_ID with the project ID.

The command provides output that includes a completion percentage and
the quantity of successful or unsuccessful network resource deletions.
An unsuccessful deletion usually indicates sharing of a resource with
one or more additional projects.

Purging resources: 100% complete.
Deleted 1 security_group, 2 ports, 1 router, 1 floatingip, 2 networks.
The following resources could not be deleted: 1 network.

The command also indicates if a project lacks network resources.

Tenant has no supported resources.