Some embodiments provide a method for a first DCN operating in a first datacenter as a logical network gateway that processes messages between other DCNs of the logical network and external entities, which address the logical network gateway using a first address. The first DCN has an interface with a second address for use in the first datacenter. The method stores a mapping between the second address and a third address. A second DCN operates the logical network gateway in a second datacenter and has an interface with the third address for use in the second datacenter. From the second DCN, the method receives connection state data, describing connections between the external entities and the DCNs of the logical network, that uses the third address. The method replaces the third address with the second address in the connection state data using the stored mapping and stores the connection state data.