Index: trunk/packages/sipb-xen-database/sipb-xen-database/sipb_xen_database/models.py
===================================================================
--- trunk/packages/sipb-xen-database/sipb-xen-database/sipb_xen_database/models.py	(revision 105)
+++ trunk/packages/sipb-xen-database/sipb-xen-database/sipb_xen_database/models.py	(revision 106)
@@ -32,7 +32,7 @@
 nic_table = Table('nics', meta,
        Column('machine_id', Integer, ForeignKey('machines.machine_id'), nullable=True),
-       Column('mac_addr', String, nullable=False),
+       Column('mac_addr', String, nullable=False, primary_key=True),
        Column('ip', String, nullable=False),
-       Column('hostname', String, primary_key=True, nullable=False))
+       Column('hostname', String, nullable=True))
 
 disk_table = Table('disks', meta,