Patent 10514941 was granted and assigned to Nicira on December, 2019 by the United States Patent and Trademark Office.
A controller of a network control system for configuring several middlebox instances is described. The middlebox instances implement a middlebox in a distributed manner in several hosts. The controller configures a first middlebox instance to obtain status of a set of servers and disseminate the obtained status to a second middlebox instance. The controller configures the second middlebox instance to use the status to select a server from the set of servers.