Scalable multiprotocol label switching based virtual private networks and methods to implement the same

US7796607B2 · kind B2 · utility

Assignees

• AT&T Intellectual Property I, L.P. · US
• THE TRUSTEES OF PRINCETON UNIVERSITY · US

Inventors

• Alexandre Gerber · Madison, US
• Subhabrata Sen · Westfield, US
• Carsten Lund · Berkeley Heights, US
• Dan Pei · Jersey City, US
• Mohammadtaghi Hajiaghayi · Cambridge, US
• Changhoon Kim · Palo Alto, US

Key dates

• Filing date: May 30, 2008
• Grant date: Sep 14, 2010
• Expiry date: Apr 10, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L45/50
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Example scalable multi-protocol label switching (MPLS) based virtual private networks (VPNs) and methods to implement the same are disclosed. A disclosed example spoke provider edge (PE) router for an MPLS-based VPN includes a truncated virtual routing and forwarding (VRF) table containing a first value referencing a hub PE router and a second value referencing a first customer edge (CE) router coupled to the VPN via the PE router, and a forwarding module to forward a packet received from the first CE router to the hub PE router when the packet contains an address referencing a second CE router coupled to the VPN via a second spoke PE router.