Distributed label switching router

Details Distributed label switching router Distributed label switching router

2005-09-20

2005-09-20

Ngo, Ricky (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S230000, C370S236000, C370S401000, C370S466000

Reexamination Certificate

active

06947428

ABSTRACT:
A distributed LSR sends data from a first edge LSR, across a non-MPLS network, to a second edge LSR, thereby enabling a non-MPLS network to interface transparently with MPLS networks. This enables a VPN to use a public network to communicate from one portion of the network to another, remote portion. The distributed LSR includes an ingress gateway logically positioned between the first edge LSR and the non-MPLS network. This ingress gateway receives label requests from the first edge LSR. These label requests are multicast to several egress gateways. At least one egress gateway sends a message back indicating that it can transmit data to the destination. In response, the ingress gateway designates that egress gateway to be a designated gateway. The egress gateway then establishes a tunnel through the non-MPLS network to the ingress gateway.

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