Systems, methods and nodes for performance measurement in segment routing networks

Abstract

The present invention provides the flexibility of piggybacking PM information to the data packets themselves or to dedicated PM packets preferably using service function chaining (SFC) for performance measurement (PM) for segment routing (SR). , so as to avoid changes in the data package. Transit / egress nodes use performance measured flow (PMF) identifiers to collect statistics for a given PMF. The PMF identifier is carried in piggyback information without using a separate SR tag. The piggybacking information carries the node information role of the node used by the transit egress node to collect statistics for a given PM segment. The present invention collects statistics for multiple segments and multiple PM types using metadata in a single received packet, thereby saving bandwidth and making PM calculations faster and more accurate. By using the present invention, there is no need for a timer / configuration requirement for each instance of performance measurement from a transit / egress node.

Description

technical field [0001] The subject matter described herein relates generally to monitoring paths in a network, and more particularly to systems, methods, and devices for determining metrics indicative of expectations about data traversing an end-to-end path across a network. experience quality. Background technique [0002] The end-to-end performance of traffic delivered across the network can be important in many scenarios, and good or poor end-to-end performance can manifest itself and be monitored or perceived by end users through various methods. A variety of factors affect end-to-end performance, including the performance of the end user's own local network or computing equipment within it, but unsatisfactory end-to-end performance with respect to traffic is often caused by the routing of that traffic across the network Because of the links on the network, the choice of end-to-end performance is usually not under the control of the end user. [0003] The service level...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned solutions are available in the prior art, the prior art has certain disadvantages due to being limited to active performance measurement or passive measurement, so it is insufficient or not suitable for most requirements of PM to achieve effective results

Moreover, most of the existing technologies are not applied to the out-of-order scenario, that is, the channel is an LSP in this scenario, and the LSP label at the receiver does not exist or cannot be used when penultimate hop popping (PHP) is used on the LSP. Identify the unique sending node and apply to LSP based on Label Distribution Protocol (LDP)

Furthermore, most existing technologies are only applicable to IP networks and cannot support PM requirements for segment routing

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