Method for rerouting MPLS traffic in ring networks

Details Method for rerouting MPLS traffic in ring networks Method for rerouting MPLS traffic in ring networks

2008-06-17

2008-06-17

Lee, Andrew C. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S222000, C370S392000

Reexamination Certificate

active

07388828

ABSTRACT:
A method is described for fast rerouting, in case of a fault, packets of MPLS traffic in a ring-like network configuration, where the MPLS traffic is formed by one or more Label Switched Paths (LSPs) entitled to protection. The method comprises rerouting the MPLS packets to a protection path in the ring, providing the rerouted MPLS packets with additional labels to their respective label stacks, and then detecting the additional labels at network nodes included in the protection path. Detection of the additional labels further allows determining egress nodes of the rerouted MPLS packets and outputting the rerouted MPLS packets at their corresponding egress points from the protection path.

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