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Transmitting packet label contexts within computer networks

  • US 9,929,947 B1
  • Filed: 01/25/2016
  • Issued: 03/27/2018
  • Est. Priority Date: 12/12/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, with a first network device intermediately positioned along a label-switched path (LSP) through a network between an ingress network device acting as an ingress to the LSP and an egress network device acting as an egress from the LSP, a Multi-Protocol Label Switching (MPLS) data unit from a second network device of the network in accordance with a label switching protocol,wherein the data unit includes a label stack affixed to a payload, wherein the label stack includes one or more MPLS labels for transporting the data unit along the LSP and additional context information associated with at least one of the labels of the label stack, and wherein the additional context information includes an ingress network address assigned to the ingress network device and an egress network address assigned to the egress network device;

    forwarding the data unit out an output interface of the first network device in accordance with the one or more MPLS labels of the label stack;

    when forwarding the data unit, parsing, with the first network device, the data unit to determine the additional context information; and

    recording, with the first network device, the forwarding of the data unit and the determined additional context information.

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