it is possible to create networks with the same cidr even though logic exists to prevent it

[Trey Morris]

(trey|n3va)~/nova> nova/bin/nova-manage network create --label public --fixed_range_v4 14.1.1.0/30 --num_networks 1 --network_size 4 --bridge xenbr1
2011-07-27 19:11:27,303 DEBUG nova.utils [-] backend <module 'nova.db.sqlalchemy.api' from '/home/trey/nova/nova/nova/db/sqlalchemy/api.pyc'> from (pid=25402) __get_backend /home/trey/nova/nova/nova/utils.py:417

(trey|n3va)~/nova> nova/bin/nova-manage network create --label public --fixed_range_v4 14.1.1.0/30 --num_networks 1 --network_size 4 --bridge xenbr1
2011-07-27 19:11:46,213 DEBUG nova.utils [-] backend <module 'nova.db.sqlalchemy.api' from '/home/trey/nova/nova/nova/db/sqlalchemy/api.pyc'> from (pid=25456) __get_backend /home/trey/nova/nova/nova/utils.py:417

Meanwhile in mysql:

mysql> select id,cidr,bridge,bridge_interface from networks;
+----+--------------+--------+------------------+
| id | cidr | bridge | bridge_interface |
+----+--------------+--------+------------------+
| 1 | 10.1.1.0/30 | xenbr1 | NULL |
| 2 | 10.10.1.0/30 | xenbr1 | NULL |
| 3 | 10.2.1.0/30 | xenbr1 | NULL |
| 4 | 14.1.1.0/30 | xenbr1 | NULL |
| 5 | 14.1.1.0/30 | xenbr1 | NULL |
+----+--------------+--------+------------------+
5 rows in set (0.00 sec)

as you can see networks 4 and 5 have identical cidr