Patent ID: 9729424
Date: 2017-08-08
CPC Classifications: H04L,Y04S

Claim:
1. A method implemented by a software defined network (SDN) controller, the method comprising: receiving, from a network node, a request for path optimization, wherein the request comprises information identifying the network node and a destination node; forwarding the request to an application layer traffic optimization (ALTO) server configured to manage a plurality of SDN controllers each controlling a different SDN domain and to mananage at least one non-compliant SDN node located outside any SDN domain; receiving, from the ALTO server, path information that identifies more than two of a plurality of SDN domains to be traversed from he network node to the destination node, wherein the plurality of SDN domains comprises a first SDN domain, in which the SDN controller and the network node reside, and a second SDN domain, in which an edge node known by the SDN controller resides; and determining a first path segment from the network node to the edge node based on the path information received from the ALTO server.