Tracing logical network packets through physical network

摘要

Some embodiments provide a method for a network controller that manages several managed forwarding elements. The method receives a request to trace a specified packet having a particular source on a logical switching element. The method generates the packet at the network controller according to the packet specification. The generated packet includes an indicator that the packet is for a trace operation. The method inserts the packet into a managed forwarding element associated with the particular source. The method receives a set of messages from a set of managed forwarding elements that process the packet regarding operations performed on the packet.

主权项

1. For a network controller that manages a plurality of managed forwarding elements, a method comprising:
receiving a request to trace a specified packet having a particular source on a logical switching element; generating the packet at the network controller according to the packet specification, the generated packet comprising an indicator that the packet is for a trace operation; sending the packet to a managed forwarding element associated with the particular source; and receiving a set of messages from a set of managed forwarding elements that process the packet regarding operations performed on the packet, wherein each managed forwarding element in the set generates a message based on a set of flow entries in its forwarding table, each flow entry of the forwarding table specifying (i) a matching condition and (ii) a corresponding set of actions that the managed forwarding element is to perform when the specified matching condition is met.