The Enhanced Transmission Selection algorithm is one scheduling algorithm supported by IEEE 802.1Q. In Enhanced Transmission Selection, they are two types or queues: Strict priority or Credit-based queues, and bandwidth-assigned queues. Each bandwidth-assigned queue has a bandwidth parameter, and the total for all bandwidth-assigned queue must be 100%.[2][3][4][5]
Example of Enhanced Transmission Selection Architecture with two CBS queues and three bandwidth-assigned queues
If there is no frame ready for transmission, in the Strict priority and Credit-based queues, a frame from the bandwidth-assigned queue can be transmitted. A bandwidth-sharing algorithm is in charge of selecting the queue such that the bandwidth consumed by each queue approaches its percentage of the bandwidth leftover by the Strict priority and Credit-based queues. If a queue uses less than its percentage, the remainder of its percentage used by other queues.
The standard does not specify which bandwidth-sharing algorithm must be used since there are a number of variants of bandwidth sharing algorithm, but gives some constraints and references Weighted round robin. The Linux implementation of ETS does not consider Credit-based queues and uses Deficit round robin as bandwidth-sharing algorithm. ETS is also implemented in Microsoft Network Drivers [6]
^ Scarfò, Antonio (21–24 June 2011). "The Evolution of Data Center Networking Technologies". Proceedings of the First International Conference on Data Compression, Communications and Processing. Palinuro, Italy: IEEE. doi:10.1109/CCP.2011.30.
^Media Access Control (MAC) Bridges and Virtual Bridged Local Area Networks — Amendment 18: Enhanced Transmission Selection for Bandwidth Sharing Between Traffic Classes, IEEE, September 2011, doi:10.1109/IEEESTD.2011.6034507, ISBN978-0-7381-6655-1
^Lama, Victor (23 March 2011). Enhanced Transmission Selection - IEEE 802.1Qaz(PDF) (Technical report). CISCO.{{cite tech report}}: CS1 maint: date and year (link)
^ "Managing Network Datalinks in Oracle® Solaris 11.2". ORACLE. 2014. Retrieved 5 October 2020.
^ Matheus Guedes de Andrade (2014). "Enhancement Transmission Selection". Universidade Federal do Rio de Janeiro. Retrieved 5 October 2020.
enhanced, transmission, selection, network, scheduler, scheduling, algorithm, that, been, defined, data, center, bridging, task, group, ieee, working, group, hierarchical, scheduler, that, combines, static, priority, scheduling, bandwidth, sharing, algorithms,. Enhanced Transmission Selection ETS is a network scheduler scheduling algorithm that has been defined by the Data Center Bridging Task Group of the IEEE 802 1 Working Group 1 It is a hierarchical scheduler that combines static priority scheduling and a bandwidth sharing algorithms such as Weighted round robin or Deficit round robin Description editThe Enhanced Transmission Selection algorithm is one scheduling algorithm supported by IEEE 802 1Q In Enhanced Transmission Selection they are two types or queues Strict priority or Credit based queues and bandwidth assigned queues Each bandwidth assigned queue has a bandwidth parameter and the total for all bandwidth assigned queue must be 100 2 3 4 5 nbsp Example of Enhanced Transmission Selection Architecture with two CBS queues and three bandwidth assigned queuesIf there is no frame ready for transmission in the Strict priority and Credit based queues a frame from the bandwidth assigned queue can be transmitted A bandwidth sharing algorithm is in charge of selecting the queue such that the bandwidth consumed by each queue approaches its percentage of the bandwidth leftover by the Strict priority and Credit based queues If a queue uses less than its percentage the remainder of its percentage used by other queues The standard does not specify which bandwidth sharing algorithm must be used since there are a number of variants of bandwidth sharing algorithm but gives some constraints and references Weighted round robin The Linux implementation of ETS does not consider Credit based queues and uses Deficit round robin as bandwidth sharing algorithm ETS is also implemented in Microsoft Network Drivers 6 See also editDeficit round robin Fairness measure Max min fairness Scheduling algorithm Statistical time division multiplexing Weighted round robin Data center bridging 802 1Qaz working group home pageReferences edit Scarfo Antonio 21 24 June 2011 The Evolution of Data Center Networking Technologies Proceedings of the First International Conference on Data Compression Communications and Processing Palinuro Italy IEEE doi 10 1109 CCP 2011 30 Media Access Control MAC Bridges and Virtual Bridged Local Area Networks Amendment 18 Enhanced Transmission Selection for Bandwidth Sharing Between Traffic Classes IEEE September 2011 doi 10 1109 IEEESTD 2011 6034507 ISBN 978 0 7381 6655 1 Lama Victor 23 March 2011 Enhanced Transmission Selection IEEE 802 1Qaz PDF Technical report CISCO a href Template Cite tech report html title Template Cite tech report cite tech report a CS1 maint date and year link Managing Network Datalinks in Oracle Solaris 11 2 ORACLE 2014 Retrieved 5 October 2020 Matheus Guedes de Andrade 2014 Enhancement Transmission Selection Universidade Federal do Rio de Janeiro Retrieved 5 October 2020 Enhanced Transmission Selection ETS Algorithm Microsoft 2017 Retrieved 5 October 2020 Retrieved from https en wikipedia org w index php title Enhanced Transmission Selection amp oldid 1166989827, wikipedia, wiki, book, books, library,
