Metadata augmentation in a service function chain

摘要

A method for augmenting metadata of a network service header is disclosed. The method includes receiving, at a first service node, a packet or frame of a traffic flow, wherein the packet has a payload and the network service header including a first metadata and a first service path information for the traffic flow, classifying, by the first service node, at least one of the payload and the first metadata to generate a second metadata different from the first metadata, and augmenting, by the first service node, the first metadata using the second metadata before forwarding the packet or frame to a second service node.

主权项

1. A method for augmenting metadata of a network service header, the method comprising:
receiving, at a first service node of a first service path, a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including a first metadata and a first service path information identifying the first service path for the traffic flow and the first metadata is a result of a previous classification of the packet or frame; classifying, by the first service node, at least one of the payload and the first metadata to determining a secondary classification and generate a second metadata different from the first metadata; determining, by the first service node, from the secondary classification that the previous classification is incorrect and the second metadata correct an error of the first metadata; and augmenting, by the first service node, the first metadata with the second metadata before forwarding the packet or frame to a second service node of the first service path.