1、 TSB-5019 April 2015High Performance Structured Cabling Use Cases for Data Centers and Other Premises NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeabilit
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20、Data Centers and Other Premises Table of Contents 1 SCOPE 1 2 REFERENCES 1 3 DEFINITIONS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE 2 3.1 General . 2 3.2 Definitions . 2 3.3 Acronyms and abbreviations 4 4 BASE-T ADVANTAGES . 5 5 COMPARISON OF DATA CENTER CABLING ARCHITECTURES . 6 5.1 Centralized
21、Switching Architecture:TIA-942 Direct Connect 6 5.2 End-of-Row and Middle-of-Row switching architecture 7 5.3 Top-of-Rack switching architecture 8 5.4 Fat-Tree Switch Fabric (also called Leaf and Spine Switch) Architecture with Twisted Pair 9 5.4.1 Leaf and spine server connections with EoR, MoR, an
22、d ToR . 9 5.4.2 Leaf and spine with Centralized Switching with BASE-T 9 6 COMPARISON OF INSTALLATION COMPONENTS 12 6.1 ToR vs. EoR . 12 7 OBJECTIVES OF CATEGORY 8 CABLING . 14 8 DATA CENTER TWISTED-PAIR MIGRATION PATH 14 9 USE CASES FOR CATEGORY 8 AND NEXT GENERATION BASE-T . 15 Annex A (informative
23、) BIBLIOGRAPHY . 19 List of Figures Figure 1 Flexibility of structured cabling to support multiple data rates . 5 Figure 2 Illustration of centralized switching architecture 6 Figure 3 Illustration of EoR and MoR switching architecture . 7 Figure 4 Illustration of top-of-rack switching architecture
24、. 8 Figure 5 Leaf and Spine and Traditional Architectures with Twisted-Pair Cabling 9 Figure 6 Overview of architecture 10 Figure 7 Review of data center layout . 10 Figure 8 Overview of centralized switching row . 11 Figure 9 Example Comparison ToR with DAC vs. ToR with Category 8 vs. Centralized S
25、witching with Category 8 . 11 DRAFT TIA-TSB-5019 ii Figure 10 Example Comparison of ToR vs. EoR implementation 13 Figure 11 Migration path from Category 6, 6A, to Category 8 . 14 Figure 12 Traditional 3-tier data center architecture 15 Figure 13 Leaf and spine data center architecture 16 Figure 14 F
26、ull mesh data center architecture 17 Figure 15 Interconnected meshes data center architecture . 18 Figure 16 Virtual switch data center architecture . 18 TIA-TSB-5019 iii FOREWORD (This foreword is not part of the TSB) This Telecommunications Systems Bulletin (TSB) was developed by TIA Subcommittee
27、TR-42.7. Approval of this TSB This TSB was approved by TIA Subcommittee TR-42.7 and TIA Engineering Committee TR-42. Contributing organizations Many companies within the telecommunications industry (including manufacturers, consultants, end users, and other organizations) contributed their expertise
28、 to the development of this TSB. Annexes Annex A is informative. Introduction This TSB is a forward looking document intended to provide usage details for how to deploy Category 8 structured cabling in data centers and other premise environments that will have a need for the 25 and 40GBASE-T applica
29、tions. The information in this TSB can then be used today when designing networks and facilities to ensure those designs are future proofed for the-se next generation products. Since its inception in the early 1990s, twisted-pair Ethernet or BASE-T has provided end-users and designers of high speed
30、computing networks with the most widely adopted physical inter-connect technology ever developed. The combination of twisted-pair Ethernets low-cost, high availability, structured topology, common physical interface, and auto negotiation capabilities made it an attractive option for the transmission
31、 of data and low voltage power in office and data center application environments when compared to other available interconnect technologies. As twisted-pair Ethernet continues to evolve with increased data rates and improved perfor-mance, users of this technology will have a migration strategy for
32、their computing networks that provides a high degree of flexibility and longevity. Category 8 cabling has a reduced channel length and number connectors over prior categories of cabling, and this TSB will analyze and show how to accommodate these changes. Stewardship Telecommunications infrastructur
33、e affects raw material consumption. The infrastructure design and installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects of telecommunications infrastructure impact our environment. Since building life cycles are typically planned for
34、decades, technological electronic equipment up-grades are necessary. The telecommunications infrastructure design and installation process magnifies the need for sustainable infrastructures with respect to building life, electronic equip-ment life cycling and considerations of effects on environment
35、al waste. Telecommunications designers are encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as part of the design process. DRAFT TIA-TSB-5019 iv Metric equivalents of United States customary units The dimensions in this TSB are metric or
36、United States customary with approximate conver-sions to the other. Life of this TSB This TSB is a living document. The criteria contained in this TSB are subject to revisions and updating as warranted by advances in building construction techniques and telecommunications technology. TIA-TSB-5019 1
37、1 SCOPE The scope of this telecommunications systems bulletin is to identify, analyze, and recommend use cases (e.g. switch fabric architectures, End-of Row, and Top-of-Rack) for high performance structured cabling (HPSC) application environments utilizing next generation BASE-T standards with data
38、rates above 10GBASE-T such as 25GBASE-T or 40GBASE-T. The use cases can be incorporated in data center or premise designs to ensure that the designs can accommodate future cabling and application standards. The premise designs may be test laboratories or equipment rooms that have requirements for hi
39、gh bandwidth similar to data centers. HPSC is generic but the use cases are specific to a vari-ety of different environments or situations. 2 REFERENCES The following standards contain provisions that are referenced in this TSB. At the time of publi-cation, the editions indicated were valid. All sta
40、ndards are subject to revision, and parties are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. ANSI and TIA maintain registers of currently valid national standards published by them. Balanced Twisted-Pair Telecommunications Cabling a
41、nd Components Standards (AN-SI/TIA-568-C.2) Balanced Twisted-Pair Telecommunications Cabling and Components Standard, Ad-dendum 1: Specifications for 100 Category 8 Cabling (ANSI/TIA-568-C.2-1) Telecommunications Infrastructure Standard for Data Centers (ANSI/TIA-942-A) DRAFT TIA-TSB-5019 2 3 DEFINI
42、TIONS, ACRONYMS AND ABBREVIATIONS, UNITS OF MEASURE 3.1 General The generic definitions in this clause have been formulated for use by the entire family of tele-communications infrastructure standards. 3.2 Definitions For the purposes of this TSB, the following definitions apply. access switch: A sw
43、itch used to connect devices, such as servers, to a local area network. aggregation switch: A switch that aggregates network traffic to and from access switches and that may also connect to network service devices (e.g., load balancers, network appliances, and 8 firewalls). backbone: A facility (e.g
44、., pathway, cable or conductors) between telecommunications rooms, or floor distribution terminals, the entrance facilities, and the equipment rooms within or between buildings. cabling: A combination of all cables, jumpers, cords, and connecting hardware. centralized switch fabric: A data center sw
45、itch fabric architecture in which the switch fabric is implemented in a single centralized switch. core switch: A backbone switch at the highest hierarchical layer of a network. cross-connect: A facility enabling the termination of cable elements and their interconnection or cross-connection. cross-
46、connection: A connection scheme between cabling runs, subsystems, and equipment using patch cords or jumpers that attach to connecting hardware on each end. equipment cable; cord: A cable or cable assembly used to connect telecommunications equipment to horizontal or backbone cabling. fat tree, fabr
47、ic: A switch connection topology where each access switch is connected to every interconnection switch within the fabric. full-mesh, fabric: A switch connection topology where each switch is directly connected to all other switches within the mesh. horizontal cabling: 1)The cabling between and inclu
48、ding the telecommunications out-let/connector and the horizontal cross-connect. 2) The cabling between and including the build-ing automation system outlet or the first mechanical termination of the horizontal connection point and the horizontal cross-connect. infrastructure (telecommunications): A
49、collection of those telecommunications components, excluding equipment, that together provide the basic support for the distribution of all infor-mation within a building or campus. interconnection: A connection scheme that employs connecting hardware for the direct con-nection of a cable to another cable without a patch cord or jumper. interconnected mesh fabric: A switch connection topology in which pods, each containing a full-mesh fabric, are connected using interconnection switches. TIA-TSB-5019 3 interconnection switch: A switch used to co
