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1. US20090080418 - Tunneling apparatus and tunnel frame sorting method and its program for use therein

Office United States of America
Application Number 11817718
Application Date 27.02.2006
Publication Number 20090080418
Publication Date 26.03.2009
Grant Number 07969996
Grant Date 28.06.2011
Publication Kind B2
IPC
H04L 12/56
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
54Store-and-forward switching systems
56Packet switching systems
Applicants NEC Corporation
Inventors Koide Toshio
Agents Sughrue Mion, PLLC
Priority Data 2005-059830 04.03.2005 JP
Title
(EN) Tunneling apparatus and tunnel frame sorting method and its program for use therein
Abstract
(EN)

The present invention provides a tunneling apparatus which can perform tunneling without requiring the network to be suspended or requiring the existing configuration of a local network to be modified. The frame sorting part 11 determines whether or not a frame input from a local network through a physical interface is an encapsulated tunnel frame. If such frame is a tunnel frame, the frame sorting part 11 outputs such frame to the decapsulation unit of the tunneling part 13. If such frame is not a tunnel frame, the frame sorting part 11 outputs such frame to at least one of the address resolution unit of the kernel part 12 and the encapsulation unit of the tunneling part, based on the characteristics of such frame.