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首页IEEE 802.3-2015: Ethernet标准与Subscriber访问网络
"IEEE 802.3-2015_section5"
本文档是IEEE 802.3标准的一部分,主要关注以太网在用户接入网络中的应用。这个标准详细规定了物理层(PHY)和数据链路层的介质访问控制(MAC)子层的实现,涵盖多种物理介质和传输速率,且使用载波监听多路访问/冲突检测(CSMA/CD)访问方式。标准不仅包含了早期的10Base2、10Base5、10BaseF、10BaseT和10Broad36等以太网类型,还涵盖了快速以太网如100BaseT、100BaseT4和100BaseX等。
在“Introduction to Ethernet for subscriber access networks”部分,文档概述了以太网在用户接入网络中的作用,强调了点对点(P2P)和点对多点(P2MP)子层的功能。P2P子层主要负责单个连接,而P2MP子层则涉及多个终端的连接,其中MPCP(Multipoint MAC Control Protocol)用于管理点对多点网络中的通信。RS(Reconciliation Sublayer)和媒体独立接口则提供了不同物理层信号系统间的协调。
文档进一步介绍了管理功能,如设备配置、状态监控和故障检测,以及单向传输的处理。状态图和协议实施一致性声明(PICS proforma)提供了实现这些功能时的详细指南,确保设备间的兼容性和一致性。
"Operations, Administration, and Maintenance (OAM)"章节详细讨论了操作、管理和维护方面的内容。OAM的主要目标是确保网络的可靠运行、性能监控、故障检测和恢复。它明确了OAM的范围、目标和非目标,并指出了OAM在IEEE 802.3架构中的位置。考虑到兼容性,OAM功能需要能在不同设备间无缝工作,包括DTE(数据终端设备)之间的互操作性。MAC Control PAUSE帧是OAM的一个关键组件,允许设备短暂地暂停数据传输以避免拥塞。
IEEE 802.3-2015_section5提供了一个全面的框架,指导以太网技术如何在用户接入网络中有效地实现和维护,确保网络的稳定性和效率。它详细规定了物理层信号系统、MAC层协议、网络管理和维护机制,这些都是构建高效、可靠以太网网络的关键要素。
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Copyright © 2015 IEEE. All rights reserved.
65.4.4.9 Delay variation........................................................................................................ 375
66. Extensions of the 10 Gb/s Reconciliation Sublayer (RS), 100BASE-X PHY, and 1000BASE-X
PHY for unidirectional transport ........................................................................................................ 376
66.1 Modifications to the physical coding sublayer (PCS) and physical medium attachment
(PMA) sublayer, type 100BASE-X .......................................................................................... 376
66.1.1 Overview........................................................................................................................... 376
66.1.2 Functional specifications .................................................................................................. 376
66.1.2.1 Variables ................................................................................................................. 376
66.1.2.2 Transmit state diagram............................................................................................ 376
66.1.2.3 Far-end fault generate ............................................................................................. 377
66.2 Modifications to the physical coding sublayer (PCS) and physical medium attachment
(PMA) sublayer, type 1000BASE-X ........................................................................................ 378
66.2.1 Overview........................................................................................................................... 378
66.2.2 Functional specifications .................................................................................................. 378
66.2.2.1 Variables ................................................................................................................. 379
66.2.2.2 Transmit .................................................................................................................. 379
66.2.2.3 Transmit state diagram............................................................................................ 379
66.3 Modifications to the reconciliation sublayer (RS) for P2P 10 Gb/s operation ......................... 380
66.3.1 Overview........................................................................................................................... 380
66.3.2 Functional specifications .................................................................................................. 380
66.3.2.1 Link fault signaling................................................................................................. 380
66.3.2.2 Variables ................................................................................................................. 380
66.3.2.3 State diagram .......................................................................................................... 380
66.4 Modifications to the RS for P2MP 10 Gb/s operation.............................................................. 381
66.4.1 Overview........................................................................................................................... 381
66.4.2 Functional specifications .................................................................................................. 381
66.4.2.1 Link fault signaling................................................................................................. 381
66.4.2.2 Variables ................................................................................................................. 381
66.4.2.3 State diagram .......................................................................................................... 381
66.5 Protocol implementation conformance statement (PICS) proforma for Clause 66,
Extensions of the 10 Gb/s Reconciliation Sublayer (RS), 100BASE-X PHY, and
1000BASE-X PHY for unidirectional transport....................................................................... 383
66.5.1 Introduction....................................................................................................................... 383
66.5.2 Identification..................................................................................................................... 383
66.5.2.1 Implementation identification................................................................................. 383
66.5.2.2 Protocol summary ................................................................................................... 383
66.5.3 Major capabilities/options................................................................................................. 384
66.5.4 PICS proforma tables for Extensions of the 10 Gb/s Reconciliation Sublayer (RS),
100BASE-X PHY, and 1000BASE-X PHY for unidirectional transport......................... 384
66.5.4.1 Maintaining compatibility with IEEE 802.1 protocols........................................... 384
66.5.4.2 Extensions of the 100BASE-X PHY ...................................................................... 384
66.5.4.3 Extensions of the 1000BASE-X PHY .................................................................... 385
66.5.4.4 Extensions of the 10 Gb/s P2P RS.......................................................................... 385
66.5.4.5 Extensions of the 10 Gb/s P2MP RS ...................................................................... 386
67. System considerations for Ethernet subscriber access networks ........................................................ 387
67.1 Overview................................................................................................................................... 387
67.2 Discussion and examples of EFM P2MP topologies................................................................ 387
67.2.1 Trade off between link span and split ratio....................................................................... 387
67.2.2 Single splitter topology...................................................................................................
.. 389
67.2.3 Tree-and-branch topology................................................................................................. 389
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Copyright © 2015 IEEE. All rights reserved.
67.2.4 Interoperability between certain 1000BASE-PX10 and 1000BASE-PX20 ..................... 389
67.3 Hybrid media topologies........................................................................................................... 390
67.4 Topology limitations................................................................................................................. 390
67.5 Deployment restrictions for subscriber access copper.............................................................. 390
67.6 Operations, Administration, and Maintenance ......................................................................... 390
67.6.1 Unidirectional links........................................................................................................... 391
67.6.2 Active and Passive modes................................................................................................. 391
67.6.3 Link status signaling in P2MP networks .......................................................................... 391
68. Physical medium dependent (PMD) sublayer type 10GBASE-LRM ................................................ 392
68.1 Overview................................................................................................................................... 392
68.1.1 Physical Medium Dependent (PMD) sublayer service interface...................................... 392
68.2 Delay constraints....................................................................................................................... 392
68.3 PMD MDIO function mapping................................................................................................. 393
68.4 PMD functional specifications.................................................................................................. 393
68.4.1 PMD block diagram.......................................................................................................... 393
68.4.2 PMD transmit function .....................................................................................................393
68.4.3 PMD receive function....................................................................................................... 393
68.4.4 PMD signal detect function .............................................................................................. 394
68.4.5 PMD_reset function.......................................................................................................... 394
68.4.6 PMD_fault function .......................................................................................................... 394
68.4.7 PMD_global_transmit_disable function ........................................................................... 394
68.4.8 PMD_transmit_fault function ........................................................................................... 395
68.4.9 PMD_receive_fault function............................................................................................. 395
68.5 PMD to MDI optical specifications .......................................................................................... 395
68.5.1 Transmitter optical specifications..................................................................................... 395
68.5.2 Characteristics of signal within, and at the receiving end of, a compliant 10GBASE-
LRM channel (informative) .............................................................................................. 396
68.5.3 Receiver optical specifications ......................................................................................... 396
68.5.3.1 Dynamic response................................................................................................... 396
68.6 Definitions of optical parameters and measurement methods .................................................. 396
68.6.1 Test patterns and related subclauses for optical parameters ............................................. 396
68.6.2 Optical modulation amplitude (OMA) ............................................................................. 398
68.6.3 Extinction ratio measurement ........................................................................................... 398
68.6.4 Relationship between OMA, extinction ratio and average power (informative).............. 400
68.6.5 Transmitter optical waveform—transmitter eye mask ..................................................... 400
68.6.5.1 Transmitter eye mask acceptable hit count examples (informative
) ...................... 402
68.6.6 Transmitter waveform and dispersion penalty (TWDP)................................................... 402
68.6.6.1 TWDP measurement procedure.............................................................................. 403
68.6.6.2 TWDP signal processing algorithm, ...................................................................... 404
68.6.7 Transmitter signal to noise ratio ....................................................................................... 406
68.6.8 Transmitter uncorrelated jitter .......................................................................................... 407
68.6.9 Comprehensive stressed receiver sensitivity and overload............................................... 408
68.6.9.1 Comprehensive stressed receiver sensitivity and overload test block diagram ...... 408
68.6.9.2 Comprehensive stressed receiver test signal characteristics................................... 409
68.6.9.3 Comprehensive stressed receiver test signal calibration......................................... 410
68.6.9.4 Comprehensive stressed receiver test procedure .................................................... 413
68.6.10 Simple stressed receiver sensitivity and overload (informative) ...................................... 413
68.6.11 Receiver jitter tolerance .................................................................................................... 413
68.7 Safety, installation, environment, and labeling......................................................................... 414
68.7.1 Safety ................................................................................................................................ 414
68.7.2 Installation ........................................................................................................................ 415
68.7.3 Environment...................................................................................................................... 415
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Copyright © 2015 IEEE. All rights reserved.
68.7.4 PMD labeling.................................................................................................................... 415
68.8 Fiber optic cabling model ......................................................................................................... 415
68.9 Characteristics of the fiber optic cabling (channel) .................................................................. 415
68.9.1 Optical fiber and cable...................................................................................................... 415
68.9.2 Optical fiber connections .................................................................................................. 415
68.9.2.1 Connection insertion loss........................................................................................ 416
68.9.2.2 Maximum discrete reflectance................................................................................ 416
68.9.3 Single-mode fiber offset-launch mode-conditioning patch cord ...................................... 416
68.10 Protocol implementation conformance statement (PICS) proforma for Clause 68, Physical
medium dependent (PMD) sublayer type 10GBASE-LRM ..................................................... 417
68.10.1 Introduction....................................................................................................................... 417
68.10.2 Identification..................................................................................................................... 417
68.10.2.1 Implementation identification................................................................................. 417
68.10.2.2 Protocol summary ................................................................................................... 417
68.10.2.3 Major capabilities/options....................................................................................... 418
68.10.3 PICS proforma tables for physical medium dependent (PMD) sublayer type
10GBASE-LRM ............................................................................................................... 418
68.10.3.1 PMD functional specifications ............................................................................... 418
68.10.3.2 Management functions............................................................................................ 419
68.10.3.3 PMD to MDI optical specifications ........................................................................ 419
68.10.3.4 Definitions of optical parameters and measurement methods ................................ 420
68.10.3.5 Safety, installation, environment, and labeling....................................................... 420
68.10.3.6 Characteristics of the fiber optic cabling (channel) ................................................ 421
69. Introduction to Ethernet operation over electrical backplanes ........................................................... 422
69.1 Overview................................................................................................................................... 422
69.1.1 Scope................................................................................................................................. 422
69.1.2 Relationship of Backplane Ethernet to the ISO OSI reference model.............................. 422
69.2 Summary of Backplane Ethernet Sublayers ............................................................................. 425
69.2.1 Reconciliation sublayer and media independent interfaces.............................................. 425
69.2.2 Management interface....................................................................................................... 425
69.2.3 Physical Layer signaling systems ..................................................................................... 425
69.2.4 Auto-Negotiation .............................................................................................................. 427
69.2.5 Management...................................................................................................................... 427
69.2.6 Low-Power Idle ................................................................................................................ 427
69.3 Delay constraints....................................................................................................................... 427
69.4 State diagrams........................................................................................................................... 428
69.5 Protocol implementation conformance statement (PICS) proforma......................................... 428
70. Physical Medium Dependent sublayer and baseband medium, type 1000BASE-KX ....................... 429
70.1 Overview................................................................................................................................... 429
70.2 Physical Medium Dependent (PMD) service interface ............................................................ 429
70.2.1 PMD_RXQUIET.request.................................................................................................. 430
70.2.1.1 Semantics of the service primitive.......................................................................... 430
70.2.1.2 When generated ...................................................................................................... 430
70.2.1.3 Effect of receipt ...................................................................................................... 430
70.2.2 PMD_TXQUIET.request.................................................................................................. 430
70.2.2.1 Semantics of the service primitive.......................................................................... 430
70.2.2.2 When generated ...................................................................................................... 430
70.2.2.3 Effect of receipt ...................................................................................................... 430
70.3 PCS requirements for Auto-Negotiation (AN) service interface
.............................................. 430
70.4 Delay constraints....................................................................................................................... 430
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Copyright © 2015 IEEE. All rights reserved.
70.5 PMD MDIO function mapping................................................................................................. 431
70.6 PMD functional specifications.................................................................................................. 431
70.6.1 Link block diagram........................................................................................................... 431
70.6.2 PMD transmit function .....................................................................................................432
70.6.3 PMD receive function....................................................................................................... 432
70.6.4 PMD signal detect function .............................................................................................. 432
70.6.5 PMD transmit disable function ......................................................................................... 433
70.6.6 Loopback mode................................................................................................................. 433
70.6.7 PMD fault function ........................................................................................................... 433
70.6.8 PMD transmit fault function ............................................................................................. 433
70.6.9 PMD receive fault function............................................................................................... 433
70.6.10 PMD LPI function ............................................................................................................ 433
70.7 1000BASE-KX electrical characteristics.................................................................................. 434
70.7.1 Transmitter characteristics................................................................................................ 434
70.7.1.1 Test fixtures ............................................................................................................ 435
70.7.1.2 Test fixture impedance............................................................................................ 435
70.7.1.3 Signaling speed ....................................................................................................... 435
70.7.1.4 Differential output eye mask................................................................................... 435
70.7.1.5 Output amplitude .................................................................................................... 436
70.7.1.6 Differential output return loss................................................................................. 437
70.7.1.7 Transition time........................................................................................................ 437
70.7.1.8 Transmit jitter .........................................................................................................438
70.7.1.9 Transmit jitter test requirements ............................................................................. 438
70.7.2 Receiver characteristics .................................................................................................... 438
70.7.2.1 Receiver interference tolerance .............................................................................. 439
70.7.2.2 Signaling speed range ............................................................................................. 439
70.7.2.3 AC-coupling............................................................................................................ 439
70.7.2.4 Input signal amplitude ............................................................................................ 439
70.7.2.5 Differential input return loss................................................................................... 440
70.8 Interconnect characteristics....................................................................................................... 440
70.9 Environmental specifications.................................................................................................... 440
70.9.1 General safety ................................................................................................................... 440
70.9.2 Network safety.................................................................................................................. 440
70.9.3 Installation and maintenance guidelines ........................................................................... 440
70.9.4 Electromagnetic compatibility.......................................................................................... 440
70.9.5 Temperature and humidity................................................................................................ 440
70.10 Protocol implementation conformance statement (PICS) proforma for Clause 70, Physical
Medium Dependent (PMD) sublayer and baseband medium, type 1000BASE-KX................ 441
70.10.1 Introduction....................................................................................................................... 441
70.10.2 Identification..................................................................................................................... 441
70.10.2.1 Implementation identification................................................................................. 441
70.10.2.2 Protocol summary ................................................................................................... 441
70.10.3 Major capabilities/options................................................................................................. 442
70.10.4 PICS proforma tables for Clause 70, Physical Medium Dependent (PMD) sublayer
and baseband medium, type 1000BASE-KX ................................................................... 443
70.10.4.1 PMD functional specifications................................................................................ 443
70.10.
4.2 Management functions............................................................................................ 444
70.10.4.3 Transmitter electrical characteristics ...................................................................... 444
70.10.4.4 Receiver electrical characteristics........................................................................... 445
70.10.4.5 Environmental and safety specifications ................................................................ 445
71. Physical Medium Dependent sublayer and baseband medium, type 10GBASE-KX4....................... 446
71.1 Overview................................................................................................................................... 446
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Copyright © 2015 IEEE. All rights reserved.
71.2 Physical Medium Dependent (PMD) service interface ............................................................ 446
71.2.1 PMD_RXQUIET.request.................................................................................................. 447
71.2.1.1 Semantics of the service primitive.......................................................................... 447
71.2.1.2 When generated ...................................................................................................... 447
71.2.1.3 Effect of receipt ...................................................................................................... 447
71.2.2 PMD_TXQUIET.request.................................................................................................. 447
71.2.2.1 Semantics of the service primitive.......................................................................... 447
71.2.2.2 When generated ...................................................................................................... 447
71.2.2.3 Effect of receipt ...................................................................................................... 447
71.3 PCS requirements for Auto-Negotiation (AN) service interface.............................................. 447
71.4 Delay constraints....................................................................................................................... 448
71.5 PMD MDIO function mapping................................................................................................. 448
71.6 PMD functional specifications.................................................................................................. 448
71.6.1 Link block diagram........................................................................................................... 448
71.6.2 PMD Transmit function .................................................................................................... 449
71.6.3 PMD Receive function......................................................................................................450
71.6.4 Global PMD signal detect function .................................................................................. 450
71.6.5 PMD lane-by-lane signal detect function ......................................................................... 450
71.6.6 Global PMD transmit disable function ............................................................................. 450
71.6.7 PMD lane-by-lane transmit disable function .................................................................... 450
71.6.8 Loopback mode................................................................................................................. 451
71.6.9 PMD fault function ........................................................................................................... 451
71.6.10 PMD transmit fault function ............................................................................................. 451
71.6.11 PMD receive fault function...............................................................................................451
71.6.12 PMD LPI function ............................................................................................................ 451
71.7 Electrical characteristics for 10GBASE-KX4 .......................................................................... 452
71.7.1 Transmitter characteristics................................................................................................ 452
71.7.1.1 Test fixtures ............................................................................................................ 453
71.7.1.2 Test fixture impedance............................................................................................ 453
71.7.1.3 Signaling speed ....................................................................................................... 453
71.7.1.4 Output amplitude .................................................................................................... 453
71.7.1.5 Output return loss.................................................................................................... 454
71.7.1.6 Differential output template.................................................................................... 455
71.7.1.7 Transition time........................................................................................................ 457
71.7.1.8 Transmit jitter .........................................................................................................457
71.7.1.9 Transmit jitter test requirements ............................................................................. 457
71.7.2 Receiver characteristics .................................................................................................... 457
71.7.2.1 Receiver interference tolerance
.............................................................................. 458
71.7.2.2 Signaling speed ....................................................................................................... 458
71.7.2.3 AC-coupling............................................................................................................ 458
71.7.2.4 Input signal amplitude ............................................................................................ 458
71.7.2.5 Differential input return loss................................................................................... 459
71.8 Interconnect characteristics....................................................................................................... 459
71.9 Environmental specifications.................................................................................................... 459
71.9.1 General safety ................................................................................................................... 459
71.9.2 Network safety.................................................................................................................. 459
71.9.3 Installation and maintenance guidelines ........................................................................... 459
71.9.4 Electromagnetic compatibility.......................................................................................... 459
71.9.5 Temperature and humidity................................................................................................ 459
71.10 Protocol implementation conformance statement (PICS) proforma for Clause 71, Physical
Medium Dependent (PMD) sublayer and baseband medium, type 10GBASE-KX4............... 460
71.10.1 Introduction....................................................................................................................... 460
71.10.2 Identification..................................................................................................................... 460
71.10.2.1 Implementation identification................................................................................. 460
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