The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2002
Filed:
Mar. 12, 1998
Herve Le Goff, Kelkheim, DE;
Norbert Haertelt, Mainz, DE;
Markus Hies, Wiesbaden, DE;
Helmut Oberheim, Frankfurt, DE;
Michael Schambach, Lampertheim, DE;
Mannesmann AG, Düsseldorf, DE;
Abstract
Economical and dependable networking of spatially separated branches of an organization is made possible for a plurality of individual subscribers with spatially separated branches by means of an arrangement and process for the operation of layer-3 virtual private networks (VPN A, VPN B) on a common data packet.communication network (e.g. OSI L3 data packet communication network ). A logical separation of the layer-3 VPNs (VPNA, VPNB) is accomplished by allocating disjoint partial address spaces of a given homogeneous total address space to these L3 VPNs. A virtual private network identification number VPN ID is assigned to each L3 VPN and used to identify the disjoint partial address space by forming a part of the address. The VPN ID characterizing the L3 VPN starts at a fixed bit position in the individual subscriber address of each individual subscriber of the L3 VPN and may have a variable or a fixed length. Secure separation of the L3 VPNs is implemented by filtering of routing information and/or data packets based on the VPN ID.