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1. (WO2013126195) SYSTEM AND METHODS FOR MANAGING NETWORK PACKET FORWARDING WITH A CONTROLLER

Pub. No.:    WO/2013/126195    International Application No.:    PCT/US2013/023865
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Thu Jan 31 00:59:59 CET 2013
IPC: H04L 29/12
H04L 12/713
H04L 12/717
Applicants: BIG SWITCH NETWORKS, INC.
Inventors: LILJENSTOLPE, Christopher, D.
FORSTER, R., Kyle
HERSEY, Daniel, C.
SIVASUBRAMANIAN, Balaji
Title: SYSTEM AND METHODS FOR MANAGING NETWORK PACKET FORWARDING WITH A CONTROLLER
Abstract:
A network controlled by a controller may include end hosts that are coupled to the switches. The network may be coupled to gateways that interface between the network and an external network. The network may include subnetworks formed from respective portions of the end hosts of the network. The controller may create virtual gateways that interface between each of the subnetworks and the network by providing the end hosts of each subnetwork with virtual gateway Ethernet addresses. The controller may receive a network packet having a virtual gateway Ethernet address from an end host of a given subnetwork. The network packet may be destined for an end host of an external network or subnetwork. The controller may forward the network packet to the destination end host by redirecting the network packet through a selected gateway or by controlling the switches to perform gateway functions.