METHOD AND APPARATUS FOR TRACING PATHS IN SERVICE FUNCTION CHAINS
First Claim
1. A method comprising:
- receiving a trace request packet at a service node in a service chain, the trace request packet comprising a service path identifier, a service index, and a service index limit;
processing the trace request packet at the service node;
comparing the service index to the service index limit;
determining that the service index is greater than the service index limit;
generating a trace response packet at the service node indicating that the service index is greater than the service index limit; and
transmitting the trace response packet;
wherein the trace response packet comprises service function information for each of a plurality of service nodes in the service chain.
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Abstract
In one embodiment, a method includes receiving a trace request packet at a service node in a service chain, the trace request packet comprising a service path identifier, a service index, and a service index limit, processing the trace request packet at the service node, comparing the service index to the service index limit, determining that the service index is greater than the service index limit, generating a trace response packet at the service node indicating that the service index is greater than the service index limit, and transmitting the trace response packet. The trace response packet comprises service function information for each of a plurality of service nodes in the service chain. An apparatus is also disclosed herein.
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Citations
20 Claims
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1. A method comprising:
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receiving a trace request packet at a service node in a service chain, the trace request packet comprising a service path identifier, a service index, and a service index limit; processing the trace request packet at the service node; comparing the service index to the service index limit; determining that the service index is greater than the service index limit; generating a trace response packet at the service node indicating that the service index is greater than the service index limit; and transmitting the trace response packet; wherein the trace response packet comprises service function information for each of a plurality of service nodes in the service chain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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an interface for receiving a trace request packet at a service node on a service chain; a processor for processing the trace request packet and determining whether to forward the trace request packet on the service chain or generate a trace report packet based on a comparison of a service index to a service index limit in the trace request packet; and memory for storing service function information comprising load information; wherein the trace report packet comprises the service function information for a plurality of service functions in the service chain and the trace request packet is forwarded on the service chain according to a service path identifier and the service index. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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an interface for transmitting a trace request packet and receiving a trace report packet on a service chain; a processor for generating the trace request packet and processing the trace report packet to identify a status of a service function path of the service chain; and memory for storing service function information from the trace report packet, the service information comprising load information for a plurality of service nodes on the service chain; wherein the trace request packet comprises a fixed service index limit for use in identifying a service node in the service chain to generate the trace report packet. - View Dependent Claims (19, 20)
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Specification