Service chain header and metadata transport
First Claim
1. A method for service chain header processing in a communication network, the method comprising:
- inserting, by an upstream service function chain (SFC) entity, a metadata Type-Length-Value (TLV) field into a service chain header (SCH) appended to a packet to be forwarded over a service chain path, wherein the SCH comprises a version field that indicates a version associated with the SCH for a downstream SFC entity to process the SCH according to the version, the version associated with the SCH representing a SCH version and being used for backward compatibility going forward with future SCH updates, and wherein the metadata Type-Length-Value (TLV) field includes metadata information with a variable length for processing the packet at the downstream SFC entity on the service chain path; and
forwarding the packet to the downstream SFC entity over the service chain path.
2 Assignments
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Accused Products
Abstract
Metadata may be embedded in a service chain header (SCH) appended to a packet that is forwarded over a service chain path. The metadata may include information that is used to process the packet at a downstream service function chain (SFC) entity on the service chain path. The metadata TLV field may identify a service action to be performed by a downstream SFC entity. For example, the metadata TLV field may instruct the downstream SFC entity to drop the packet, to redirect the packet (or a traffic flow associated with the packet), to mirror a traffic flow, to terminate a communication connection, to start or stop a packet accounting, and/or to apply a higher grade of service. In another embodiment, the metadata TLV field specifies an OAM service action list that identifies service actions that have been performed on the packet.
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Citations
46 Claims
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1. A method for service chain header processing in a communication network, the method comprising:
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inserting, by an upstream service function chain (SFC) entity, a metadata Type-Length-Value (TLV) field into a service chain header (SCH) appended to a packet to be forwarded over a service chain path, wherein the SCH comprises a version field that indicates a version associated with the SCH for a downstream SFC entity to process the SCH according to the version, the version associated with the SCH representing a SCH version and being used for backward compatibility going forward with future SCH updates, and wherein the metadata Type-Length-Value (TLV) field includes metadata information with a variable length for processing the packet at the downstream SFC entity on the service chain path; and forwarding the packet to the downstream SFC entity over the service chain path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An upstream service function chain (SFC) entity comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; insert a metadata Type-Length-Value (TLV) field into a service chain header (SCH) appended to a packet to be forwarded over a service chain path, wherein the SCH comprises a version field that indicates a version associated with the SCH for a downstream SFC entity to process the SCH according to the version associated with the SCH, the version associated with the SCH representing a SCH version and being used to ensure backward compatibility going forward with future SCH updates, and wherein the metadata Type-Length-Value (TLV) field includes metadata information with variable lengths for processing the packet at a downstream SFC entity on the service chain path; and forward the packet to the downstream SFC entity over the service chain path. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for service chain header processing in a communication network, the method comprising:
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receiving, by a downstream service function chain (SFC) entity, a packet over a service chain path from an upstream SFC entity, wherein the packet includes a service chain header (SCH) comprising a version field that indicates a version associated with the SCH for the downstream SFC entity to process the SCH according to the version, the version associated with the SCH representing a SCH version and being used for backward compatibility going forward with future SCH updates, and wherein the SCH comprises a metadata Type-Length-Value (TLV) field including metadata information with a variable length; and processing, by the downstream SFC, the packet in accordance with the metadata information included in the metadata TLV field embedded in the SCH. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A downstream service function chain (SFC) entity comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; receive a packet over a service chain path from an upstream SFC entity, wherein the packet includes a service chain header (SCH) comprising a version field that indicates a version associated with the SCH for the downstream SFC entity to process the SCH according to the version associated with the SCH, the version associated with the SCH representing a SCH version and being used to ensure backward compatibility going forward with future SCH updates, and wherein the SCH comprises a metadata Type-Length-Value (TLV) field including metadata information with a variable length; and process the packet in accordance with the metadata information included in the metadata TLV field embedded in the SCH. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification