Route advertisement by managed gateways

A non-transitory machine readable medium storing a network controller program to manage a plurality of logical networks, the program for execution by at least one set of processing units, the program comprising sets of instructions for:

• receiving a specification of a logical network that comprises a logical forwarding element with at least two logical ports that each connect the logical network to an external network and that each peer with a physical router of the external network in order to advertise network address reachability information for the logical network to the external network;
• selecting host machines from a plurality of host machines to host gateways for implementing each of the logical ports that connect the logical network to the external network;
• and
• generating, for distribution to each of the gateways, data tuples defining (i) a routing table for implementing the connection between the logical network and the external network for the port implemented by the gateway and (ii) a configuration for a routing protocol application operated by the gateway, said routing protocol application enabling the gateway to peer with the physical router of the external network peering with the logical port implemented by the gateway.