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A lightweight path consistency verification based on INT in SDN.

Ping Wu1, Yuwei Shang2, Shuaitao Bai2

  • 1Beijing Yungu Kechuang Information Technology Co., Ltd. Beijing 100036, China.

Mathematical Biosciences and Engineering : MBE
|December 5, 2023
PubMed
Summary
This summary is machine-generated.

A new lightweight path consistency validation mechanism for Software-Defined Networking (SDN) uses in-band network telemetry (INT) to reduce overhead. This approach minimizes bandwidth usage and communication costs for efficient network management.

Keywords:
in-band network telemetrypath consistency verificationsoftware-defined networkinguniform sampling algorithm

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Area of Science:

  • Computer Science
  • Networking
  • Telecommunications

Background:

  • Traditional path consistency verification in Software-Defined Networking (SDN) suffers from high bandwidth and communication overhead due to probing packets or linear-scale tags.
  • Existing methods present scalability challenges as network paths increase in length.

Purpose of the Study:

  • To propose a lightweight path consistency validation mechanism for SDN.
  • To reduce the significant bandwidth and communication overhead associated with existing solutions.
  • To enhance network management efficiency through effective path verification.

Main Methods:

  • A novel mechanism based on in-band network telemetry (INT) is introduced.
  • Ingress switches probabilistically insert telemetry instruction headers.
  • Subsequent switches use uniform sampling to update telemetry data, carrying only partial path information to maintain constant header size.
  • Egress switches report aggregated telemetry data to the controller for path compliance verification.
  • A heuristic flow selection algorithm is employed for network-level validation.

Main Results:

  • The proposed mechanism effectively limits packet header overhead.
  • Experimental results show minimal additional forwarding delays (less than 7%).
  • Throughput degradation is limited to a maximum of 6%.

Conclusions:

  • The developed in-band network telemetry (INT) based scheme offers an efficient solution for path consistency validation in SDN.
  • The approach significantly reduces overhead compared to traditional methods.
  • The mechanism provides effective network-level path validation with negligible performance impact.