Some embodiments provide a method for managing several managed switching elements in
a network. The method deter mines con? gurations for the several managed switching ele …

(57) ABSTRACT A control application of some embodiments allows a user to enable a
logical switching element for Quality of Service (QoS). QoS in some embodiments is a …

A network controller for managing a set of interconnection switching elements that connect
segmented networks to a shared physical interconnection network. The network controller …

(60) Provisional application No. 61/361,912, filed on Jul. 6, Updated portions of prosecution
history of US Appl. No. 2010, provisional application No. 61/361,913, filed on 12/286,098 …

Some embodiments provide a virtualizer for managing a plurality of managed switching
elements that forward data through a network. The virtualizer comprises a first set of tables …

Some embodiments provide a distributed control system for controlling managed switching
elements of a network. The distributed control system comprises a first controller for …

In a hierarchical switching architecture that includes at least one lower level managed
switching element that connects to several higher level managed switching elements, some …

(57) ABSTRACT A controller of a network control system for configuring several middlebox
instances is described. The middlebox instances implement a middlebox in a distributed …

Some embodiments provide a control system for managing a network that includes several
switching elements managed by the control system. The system includes several controller …

Some embodiments provide a distributed control system for controlling managed switching
elements of a network. The distributed control system comprises a first network virtualizer for …