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Stacking Metadata Contexts for Service Chains

  • US 20140362857A1
  • Filed: 06/05/2013
  • Published: 12/11/2014
  • Est. Priority Date: 06/05/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • in a network comprising a plurality of network nodes each configured to apply one or more service functions to traffic that passes through the respective network nodes, receiving at a network node packets encapsulated in a service header that includes information defining a variable set of context headers stacked into an association of metadata that is relevant to one or more service functions within a service path comprised of one or more network nodes; and

    at the network node, interpreting a forwarding state and a next-hop network node for the service path from the service header, and determining a service action or associated metadata from the set of context headers.

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