String ipPange = vlan.getIpRange();
String[] range = ipPange.split("-");
String startIp = range[0];
String endIp = range[1];
txn.start();
IPRangeConfig config = new IPRangeConfig();
long startIPLong = NetUtils.ip2Long(startIp);
long endIPLong = NetUtils.ip2Long(endIp);
config.savePublicIPRange(txn, startIPLong, endIPLong, vlan.getDataCenterId(), vlan.getId(), vlan.getNetworkId(), vlan.getPhysicalNetworkId());
txn.commit();