public override ExternalIps GetIpsOfExternalNetworkOfCurrentEnterprise(VlanNetwork vlan, bool free)
        {
            Contract.Requires(null != vlan);

            return(default(ExternalIps));
        }
        public override PublicIps GetPublicIpsToPurchaseOfPublicNetwork(VirtualDataCenter virtualDataCenter, VlanNetwork vlan)
        {
            Contract.Requires(null != virtualDataCenter);
            Contract.Requires(null != vlan);

            return(default(PublicIps));
        }
        public override PrivateIps GetIpsOfPrivateNetwork(VlanNetwork vlan, bool free)
        {
            Contract.Requires(null != vlan);

            return(default(PrivateIps));
        }