Synnefo

    SUBNET_NAME_LENGTH = 128

    network = models.ForeignKey('Network', null=False, db_index=True,

    name = models.CharField('Subnet Name', max_length=SUBNET_NAME_LENGTH,

                            null=True, default="")

    ipversion = models.IntegerField('IP Version', default=4, null=False)

    }

    network = models.ForeignKey(Network, related_name='backend_networks',

    backend = models.ForeignKey(Backend, related_name='networks',

                                on_delete=models.PROTECT)

    created = models.DateTimeField(auto_now_add=True)

class IPAddress(models.Model):

    subnet = models.ForeignKey("Subnet", related_name="ips", null=False,

    network = models.ForeignKey(Network, related_name="ips", null=False,

    nic = models.ForeignKey("NetworkInterface", related_name="ips", null=True,

                            on_delete=models.SET_NULL)

    userid = models.CharField("UUID of the owner", max_length=128, null=False,

                              max_length=NETWORK_IFACE_NAME_LENGTH,

                              null=False, db_index=True)

    machine = models.ForeignKey(VirtualMachine, related_name='nics',

    network = models.ForeignKey(Network, related_name='nics',

    created = models.DateTimeField(auto_now_add=True)

    updated = models.DateTimeField(auto_now=True)

    index = models.IntegerField(null=True)

    manager = pools.IPPool

    subnet = models.ForeignKey('Subnet', related_name="ip_pools",

                               db_index=True, null=True)

    def __unicode__(self):