Neutron accepting multiple networks/subnets to be created with same name, network address

[kiran-vemuri]

Description:
------------
I am able to create multiple networks/subnets with the same name and network address. This behaviour can result in confusion.

Expected Behaviour:
------------------
Enforcing uniqueness in network/subnet names

Environment:
-----------
OpenStack Mitaka on Ubuntu 14.04 server

Reproduction Steps:
-------------------

Steps from horizon:
1. Create multiple networks/subnets with same name and same addresses

Result:
-------
neutron net-list
+--------------------------------------+--------+---------------------------------------------------+
| id | name | subnets |
+--------------------------------------+--------+---------------------------------------------------+
| e7d3c477-4c37-4871-af51-0567b3d4a03b | intnet | f9ef42c7-f190-4f6b-b7a3-eb85d55c8c1a 2.2.2.0/24 |
| 182434dc-0c5b-4ba9-9dee-dfefbdf81d23 | intnet | 0d2e21a1-df8a-4d0a-a11d-9b0646a158e3 2.2.2.0/24 |
| 258095ac-e04d-485e-9e83-956499208da9 | intnet | dfc87017-06dd-4449-a898-9a3c30eb1d81 2.2.2.0/24 |
| 134aa0b6-dc03-4b82-9e17-150ec5aa5471 | extnet | f25d0a78-033c-4434-9b5d-5779dd72b8f4 10.10.0.0/16 |
+--------------------------------------+--------+---------------------------------------------------+

neutron subnet-list
+--------------------------------------+--------+--------------+------------------------------------------------+
| id | name | cidr | allocation_pools |
+--------------------------------------+--------+--------------+------------------------------------------------+
| f9ef42c7-f190-4f6b-b7a3-eb85d55c8c1a | intsub | 2.2.2.0/24 | {"start": "2.2.2.2", "end": "2.2.2.254"} |
| 0d2e21a1-df8a-4d0a-a11d-9b0646a158e3 | intsub | 2.2.2.0/24 | {"start": "2.2.2.2", "end": "2.2.2.254"} |
| dfc87017-06dd-4449-a898-9a3c30eb1d81 | | 2.2.2.0/24 | {"start": "2.2.2.2", "end": "2.2.2.254"} |
| f25d0a78-033c-4434-9b5d-5779dd72b8f4 | extsub | 10.10.0.0/16 | {"start": "10.10.70.30", "end": "10.10.70.40"} |
+--------------------------------------+--------+--------------+------------------------------------------------+

[Dariusz Smigiel (smigiel-dariusz)]

It's not a bug.

[kiran-vemuri (kiran-vemuri)]

@smigiel-dariusz Can you please let me know why having same names and same network addresses in the same project is valid?

[Akihiro Motoki (amotoki)]

Regarding 'name', 'name' in Neutron is just a human-readable short string. There is no need to be unique.
If a user want to avoid confusion I mention, he/she can set unique name.

Regarding having overlapping CIDR, it is an intended behavior. A single project can have multiple networks and each of these network can have a subnet with some same range of IP addresses. A single network cannot have subnets with overlapping address range.

[kiran-vemuri (kiran-vemuri)]

@Akihirio:

Understood. Thank you for explaining.

[Armando Migliaccio (armando-migliaccio)]

Names are generally not the unique identifiers in OpenStack. You can create multiple resources, any type, and use the same name over and over again. This is not just an issue with security groups per se.