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首页100Gbase SR4光纤标准:40Gbps与100Gbps以太网物理层规格与管理参数
IEEE 802.3bm标准是针对光纤 optic 电缆上40 Gb/s和100 Gb/s高速以太网操作的物理层规格及管理参数的最新修正案。该标准由IEEE LAN/MAN Standards Committee负责制定,它是IEEE 802.3标准(最初于2012年发布)的增补,包括了IEEE 802.3bk(2013年修订)和IEEE 802.3bj(2014年修订)的影响。发布于2015年2月16日,IEEE-SA Standards Board批准,并在同年3月27日出版。
IEEE 802.3bm标准关注的核心内容是100Gbase SR4技术,这是一种使用双纤双向(Double-FEC, Forward Error Correction)的100 Gigabit Ethernet传输方式,特别适用于数据中心等对高速、低延迟和高带宽需求极高的环境。SR4(Source-Routed 4)表示数据包可以在传输过程中动态路由,提供更灵活的网络配置和更好的故障隔离能力。
该标准规定了信号调制技术,如PAM-4(四电平脉冲幅度调制)和相干光通信,以及相关的物理层接口规范,包括波长、频率、编码和解码方法。此外,它还涵盖了系统架构、线路编码、误码检测与纠正、功率消耗、热插拔兼容性、光接口光学性能等方面的要求,以确保100Gbase SR4系统的稳定运行和互操作性。
在管理参数方面,IEEE 802.3bm关注于光模块的管理和维护,包括光功率、光接收灵敏度、色散容限、光模块类型和速率等级等关键指标。它还涉及到了光纤连接器类型和布局,以及对于不同应用场景(例如数据中心内部局域网或长距离通信)的优化建议。
IEEE 802.3bm标准是现代数据中心网络基础设施的重要组成部分,为实现100 Gb/s光纤网络提供了全面的技术指南,有助于提升网络效率、降低信号失真并支持未来更高级别的数据传输。遵循这一标准,工程师们能够设计和部署高密度、高性能的光纤网络系统,以适应不断增长的数据流量需求。
xiv Copyright © 2015 IEEE. All rights reserved.
86.1 Overview..................................................................................................................................... 44
86.8 Definitions of optical and dual-use parameters and measurement methods............................... 45
86.8.4 Optical parameter definitions..............................................................................................
45
86.8.4.7 Stressed receiver sensitivity.................................................................................... 45
86.10 Optical channel ..............................................................................................................
............. 45
86.10.1 Fiber optic cabling model .................................................................................................
.. 45
87. Physical Medium Dependent (PMD) sublayer and medium, type 40GBASE–LR4 and
40GBASE–ER4 .......................................................................................................................
............. 46
87.1 Overview.....................................................................................................................
................ 46
87.2 Physical Medium Dependent (PMD) service interface
.............................................................. 47
87.3 Delay and Skew ................................................................................................................
.......... 48
87.3.1 Delay constraints..........................................................................................................
....... 48
87.5 PMD functional specifications................................................................................................
.... 48
87.5.1 PMD block diagram..........................................................................................................
.. 48
87.6 Wavelength-division-multiplexed lane assignments
.................................................................. 49
87.7 PMD to MDI optical specifications
for 40GBASE–LR4 and 40GBASE–ER4 ......................... 49
87.7.1 40GBASE–LR4 and 40GBASE–ER4 transmitter optic
al specifications........................... 50
87.7.2 40GBASE–LR4 and 40GBASE–ER4 receive optical specifications................................. 51
87.7.3 40GBASE–LR4 and 40GBASE–ER4 illustrative link power budgets .............................. 52
87.8 Definition of optical parameters and measurement methods
...................................................... 52
87.8.1 Test patterns for optical parameters.................................................................................... 52
87.8.4
Average optical power ........................................................................................................ 53
87.8.6 Transmitter and dispersion penalty..................................................................................... 53
87.8.6.2 Channel requirements ............................................................................................. 53
87.8.7 Extinction ratio ................................................................................................................... 54
87.8.11 Stressed receiver sensitivity................................................................................................ 54
87.8.11.5 Stressed receiver conformance test procedure for WDM conformance testing ..... 54
87.9 Safety, installation, environment, and labeling........................................................................... 54
87.9.2 Laser safety ...............................................................................................................
.......... 54
87.9.4 Environment........................................................................................................................ 55
87.9.4.1 Electromagnetic emission ....................................................................................... 55
87.10 Fiber optic cabling model ....................................................................................................
....... 55
87.11 Characteristics of the fiber optic cabling (channel)
.................................................................... 55
87.11.1 Optical fiber cable........................................................................................................
....... 56
87.11.3 Medium Dependent Interface (MDI) requirements ............................................................ 56
87.12 Requirements for interoperation between 40GBASE-L
R4 and 40GBASE-ER4....................... 56
87.13 Protocol implementation conformance st
atement (PICS) proforma for Clause 87, Physical
Medium Dependent (PMD) sublayer and medium, type 40GBASE-LR4 and 40GBASE-
ER4 .............................................................................................................................
................ 57
87.13.1 Introduction...............................................................................................................
.......... 57
87.13.2 Identification....................................................................................................................... 57
87.13.2.2 Protocol summary ................................................................................................... 57
87.13.3 Major capabilities/options................................................................................................... 57
87.13.4 PICS proforma tables for Physical Medium Dependent (PMD) sublayer and medium,
type 40GBASE-LR4 and 40GBASE-ER4.......................................................................... 57
87.13.4.3 PMD to MDI optical specifications for 40GBASE-LR4........................................ 58
87.13.4.3a PMD to MDI optical specifications for 40GBASE-ER4........................................ 58
88. Physical Medium Dependent (PMD) sublayer and medium, type 100GBASE–LR4 and
100GBASE–ER4 .....................................................................................................................
............. 59
88.1 Overview.....................................................................................................................
................ 59
Copyright © 2015 IEEE. All rights reserved. xv
89. Physical Medium Dependent (PMD) sublayer and medium, type 40GBASE-FR ............................... 60
89.1 Overview..................................................................................................................................... 60
91. Reed-Solomon Forward Error Correction (RS-FEC) sublayer for 100GBASE-R PHYs
.................... 61
91.2 FEC service interface........................................................................................................
.......... 61
91.3 PMA compatibility ...........................................................................................................
.......... 61
91.5 Functions within the RS-FEC sublayer ...................................................................................... 61
91.5.2 Transmit function.........................................................................................................
....... 61
91.5.2.7 Reed-Solomon encoder........................................................................................... 61
91.5.3 Receive function ................................................................................................................. 61
91.5.3.3 Reed-Solomon decoder........................................................................................... 61
91.7 Protocol implementation conformance st
atement (PICS) proforma for Clause 91, Reed-
Solomon Forward Error Correction (RS-FEC) sublayer for 100GBASE-R PHYs
.................... 62
91.7.3 Major capabilities/options.................................................................................................
.. 62
91.7.4 PICS proforma tables for Reed-Solomon Forward Error Correction (RS-FEC)
sublayer for 100GBASE-R PHYs....................................................................................... 62
91.7.4.1 Transmit function.................................................................................................... 62
91.7.4.2 Receive function ..................................................................................................... 63
92. Physical Medium Dependent (PMD) sublayer and baseband m
edium, type 100GBASE-CR4........... 64
92.1 Overview.....................................................................................................................
................ 64
92.3 PCS requirements for Auto-Negotiation (AN) service interface
................................................ 64
92.14 Protocol implementation conformance st
atement (PICS) proforma for Clause 92, Physical
Medium Dependent (PMD) sublayer and baseband medium,
type 100GBASE-CR4 ............... 64
92.14.3 Major capabilities/options................................................................................................
... 64
93. Physical Medium Dependent (PMD) sublayer an
d baseband medium, type 100GBASE-KR4 .......... 65
93.1 Overview.....................................................................................................................
................ 65
93.3 PCS requirements for Auto-Negotiation (AN) service interface
................................................ 65
93.11 Protocol implementation conformance st
atement (PICS) proforma for Clause 93, Physical
Medium Dependent (PMD) sublayer and baseband medium,
type 100GBASE-KR4 ............... 65
93.11.3 Major capabilities/options................................................................................................
... 65
94. Physical Medium Attachment (PMA) sublayer, Physical Medium Dependent (PMD) sublayer,
and baseband medium, type 100GBASE-KP4 ..................................................................................... 66
94.1 Overview.....................................................................................................................
................ 66
94.3 Physical Medium Dependent (PMD) Sublayer .......................................................................... 66
94.3.2 PCS requirements for Auto-Negotiation (AN) service interface
........................................ 66
94.6 Protocol implementation conformance st
atement (PICS) proforma for Clause 94, Physical
Medium Attachment (PMA) and Physical Medium Dependent (PMD) sublayer and
baseband medium, type 100GBASE-KP4 .................................................................................. 66
94.6.3 Major capabilities/options.................................................................................................
.. 66
95. Physical Medium Dependent (PMD) sublayer and medium,
type 100GBASE-SR4 ........................... 67
95.1 Overview.....................................................................................................................
................ 67
95.1.1 Bit error ratio ............................................................................................................
.......... 68
95.2 Physical Medium Dependent (PMD) service interface
.............................................................. 68
95.3 Delay and Skew ................................................................................................................
.......... 69
xvi Copyright © 2015 IEEE. All rights reserved.
95.3.1 Delay constraints................................................................................................................. 69
95.3.2 Skew constraints ................................................................................................................. 69
95.4 PMD MDIO function mapping................................................................................................... 70
95.5 PMD functional specifications................................................................................................
.... 70
95.5.1 PMD block diagram..........................................................................................................
.. 71
95.5.2 PMD transmit function ....................................................................................................... 71
95.5.3 PMD receive function......................................................................................................... 71
95.5.4 PMD global signal detect function ..................................................................................... 72
95.5.5 PMD lane-by-lane signal detect function ........................................................................... 72
95.5.6 PMD reset function............................................................................................................. 72
95.5.7 PMD global transmit disable function (optional) ............................................................... 73
95.5.8 PMD lane-by-lane transmit disable function (optional) ..................................................... 73
95.5.9 PMD fault function (optional) ............................................................................................ 73
95.5.10 PMD transmit fault function (optional) .............................................................................. 73
95.5.11 PMD receive fault function (optional)................................................................................ 73
95.6 Lane assignments..............................................................................................................
.......... 73
95.7 PMD to MDI optical specifications
for 100GBASE-SR4 .......................................................... 74
95.7.1 100GBASE-SR4 transmitter optical specifications
............................................................ 74
95.7.2 100GBASE-SR4 receive optical specifications.................................................................. 75
95.7.3 100GBASE-SR4 illustrative link power budget ................................................................. 75
95.8 Definition of optical parameters and measurement methods
...................................................... 75
95.8.1 Test patterns for optical parameters.................................................................................... 76
95.8.1.1
Multi-lane testing considerations............................................................................ 77
95.8.2 Center wavelength and spectral width................................................................................ 77
95.8.3 Average optical power ........................................................................................................ 77
95.8.4 Optical Modulation Amplitude (OMA).............................................................................. 77
95.8.5 Transmitter and dispersion eye closure (TDEC) ................................................................ 78
95.8.5.1 TDEC conformance test setup ................................................................................ 78
95.8.5.2 TDEC measurement method................................................................................... 78
95.8.6 Extinction ratio ................................................................................................................... 80
95.8.7 Transmitter optical waveform (transmit eye) ..................................................................... 81
95.8.8 Stressed receiver sensitivity................................................................................................ 81
95.8.8.1 Stressed receiver conformance test block diagram................................................. 81
95.8.8.2 Stressed receiver conformance test signal characteristics and calibration ............. 83
95.8.8.3 J2 and J4 Jitter......................................................................................................... 83
95.8.8.4 Stressed receiver conformance test signal verification........................................... 84
95.8.8.5 Sinusoidal jitter for receiver conformance test ....................................................... 84
95.9 Safety, installation, environment, and labeling........................................................................... 84
95.9.1 General safety ..............................................................................................................
....... 84
95.9.2 Laser safety ......................................................................................................................... 85
95.9.3 Installation .......................................................................................................................... 85
95.9.4 Environment........................................................................................................................ 85
95.9.5 Electromagnetic emission ................................................................................................... 85
95.9.6 Temperature, humidity, and handling................................................................................. 85
95.9.7 PMD labeling requirements ................................................................................................ 85
95.10 Fiber optic cabling model ....................................................................................................
....... 86
95.11 Characteristics of the fiber optic cabling (channel)
.................................................................... 86
95.11.1 Optical fiber cable........................................................................................................
....... 86
95.11.2 Optical fiber connection...................................................................................................... 87
95.11.2.1 Connection insertion loss........................................................................................ 87
95.11.2.2 Maximum discrete reflectance................................................................................ 87
95.11.3 Medium Dependent Interface (MDI) .................................................................................. 87
95.11.3.1 Optical lane assignments ........................................................................................ 87
95.11.3.2 Medium Dependent Interface (MDI) requirements ................................................ 88
Copyright © 2015 IEEE. All rights reserved. xvii
95.12 Protocol implementation conformance st
atement (PICS) proforma for Clause 95, Physical
Medium Dependent (PMD) sublayer and medium, type
100GBASE-SR4................................ 89
95.12.1 Introduction...............................................................................................................
.......... 89
95.12.2 Identification....................................................................................................................... 89
95.12.2.1 Implementation identification................................................................................ 89
95.12.2.2 Protocol summary ................................................................................................... 89
95.12.4 PICS proforma tables for Physical Medium Dependent (PMD) sublayer and medium,
type 100GBASE-SR4 ......................................................................................................... 90
95.12.4.1 PMD functional specifications................................................................................ 90
95.12.3 Major capabilities/options................................................................................................... 90
95.12.4.2 Management functions............................................................................................ 91
95.12.4.3 PMD to MDI optical specifications for 100GBASE-SR4 ...................................... 92
95.12.4.4 Optical measurement methods................................................................................ 92
95.12.4.5 Environmental specifications.................................................................................. 92
95.12.4.6 Characteristics of the fiber optic cabling and MDI................................................. 93
Annex A (informative) Bibliography ........................................................................................................... 94
Annex 83A (normative) 40 Gb/s Attachment Unit Interface (XLAUI) and 100 Gb/s ten-lane
Attachment Unit Interface (CAUI-10).........................
..................................................................... 95
83A.1 Overview....................................................................................................................
................ 95
83A.1.1 Summary of major concepts ............................................................................................. 96
83A.1.2 Rate of operation........................................................................................................
....... 96
83A.2 XLAUI/CAUI-10 link block diagram........................................................................................ 96
83A.3 XLAUI/CAUI-10 electrical characteristics
............................................................................... 97
83A.3.1 Signal levels ............................................................................................................
.......... 97
83A.3.2 Signal paths.............................................................................................................
.......... 97
83A.3.2a EEE operation ............................................................................................................
....... 97
83A.3.3 Transmitter characteristics ...............................................................................................
. 98
83A.3.3.1 Output amplitude .................................................................................................... 98
83A.
3.3.1.1 Amplitude and swing ...................................................................................... 98
83A.3.3.6 Global transmit disable function............................................................................. 98
83A.3.4 Receiver characteristics ..................................................................................................
.. 99
83A.3.4.2 Input signal definition ............................................................................................. 99
83A.
3.4.5 AC coupling ............................................................................................................ 99
83A.3.4.6 Jitter tolerance......................................................................................................... 99
83A.3.4.7 Global energy detect function................................................................................. 99
83A.4 Interconnect characteristics.................................................................................................
..... 100
83A.5 Electrical parameter measurement methods ............................................................................ 100
83A.5.1 Transmit jitter ............................................................................................................
..... 100
83A.5.2 Receiver tolerance.........................................................................................................
.. 100
83A.6 Environmental specifications.................................................................................................
.. 101
83A.6.4 Electromagnetic compatibility ........................................................................................ 101
83A.6.5 Temperature and humidity.............................................................................................. 101
83A.7 Protocol implementation conformance statem
ent (PICS) proforma for Annex 83A, 40 Gb/s
Attachment Unit Interface (XLAUI)
and 100 Gb/s ten-lane Attachment Unit Interface
(CAUI-10)........................................................................................................................
........ 102
83A.7.1 Introduction.............................................................................................................
........ 102
83A.7.2 Identification ...........................................................................................................
........ 102
83A.7.2.2 Protocol summary ................................................................................................. 102
83A.7.3 Major capabilities/options............................................................................................... 102
83A.7.4 XLAUI/CAUI-10 transmitter requirements.................................................................... 103
83A.7.5 XLAUI/CAUI-10 receiver requirements
........................................................................ 103
xviii Copyright © 2015 IEEE. All rights reserved.
83A.7.6 Electrical measurement methods .................................................................................... 103
Annex 83B (normative) Chip-to-module 40 Gb/s Attachment Unit Interface (XLAUI) and 100 Gb/s
ten-lane Attachment Unit Interface (CAUI-10)
.............................................................................. 104
83B.1 Overview ....................................................................................................................
.............. 104
83B.2 Compliance point specifications for chip-to-m
odule XLAUI/CAUI-10 ................................. 105
83B.2.1 Module specifications ..................................................................................................... 105
83B.2.2 Host specifications........................................................................................................
.. 106
83B.2.3 Host input signal tolerance ..........................
................................................................... 106
83B.3 Environmental specifications .................................................................................................
.. 107
83B.3.4 Electromagnetic compatibility........................................................................................ 107
83B.3.5 Temperature and humidity.............................................................................................. 107
83B.4 Protocol implementation conformance statem
ent (PICS) proforma for Annex 83B, Chip-
to-module 40 Gb/s Attachment Unit Interface
(XLAUI) and 100 Gb/s ten-lane
Attachment Unit Interface (CAUI-10)
..................................................................................... 107
83B.4.1 Introduction.............................................................................................................
........ 107
83B.4.2 Identification...........................................................................................................
........ 107
83B.4.2.2 Protocol summary ................................................................................................. 107
83B.4.3 Major capabilities/options............................................................................................... 108
83B.4.4 Module requirements ...................................................................................................... 108
83B.4.5 Host requirements .........................................................................................................
.. 108
Annex 83C (normative) PMA sublayer partitioning examples .................................................................. 109
83C.1 Partitioning examples with FEC
.............................................................................................. 109
83C.1.2 FEC implemented with PMD ......................................................................................... 109
83C.1a Partitioning examples with RS-FEC
........................................................................................ 110
83C.1a.2 Single CAUI-10 with RS-FEC
....................................................................................... 110
83C.2 Partitioning examples without FEC
......................................................................................... 111
83C.2.2 Single XLAUI/CAUI-4 without FEC
............................................................................. 111
83C.2.3 Separate SERDES for optical module interface
............................................................. 112
Annex 83D (normative) Chip-to-chip 100 Gb/s four-lane Attachment Unit Interface
(CAUI-4).............. 113
83D.1 Overview....................................................................................................................
.............. 113
83D.2 CAUI-4 chip-to-chip compliance point definition
................................................................... 115
83D.3 CAUI-4 chip-to-chip electrical characteristics
........................................................................ 115
83D.3.1 CAUI-4 transmitter characteristics ................................................................................. 115
83D.3.1.1 Transmitter equalization settings .......................................................................... 116
83D.3.2 Optional EEE operation .................................................................................................. 117
83D.3.3 CAUI-4 receiver characteristics...................................................................................... 118
83D.3.3.1 Receiver interference tolerance
............................................................................ 118
83D.3.3.2 Transmitter equalization feedback (optional) ....................................................... 119
83D.3.4 Global energy detect function for optional EEE oper
ation............................................. 119
83D.4 CAUI-4 chip-to-chip channel characteristics
........................................................................... 119
83D.5 Example usage of the optional transmitter equalization feedback
........................................... 121
83D.5.1 Overview.................................................................................................................
........ 121
83D.5.2 Tuning equalization settings on lane 0 in the transmit direction
.................................... 122
83D.5.3 Tuning equaliza
tion settings on lane 0 in the receive direction...................................... 122
83D.6 Protocol implementation conformance statem
ent (PICS) proforma for Annex 83D, Chip-
to-chip 100 Gb/s four-lane Attachment Unit Interface (C
AUI-4) ........................................... 123
83D.6.1 Introduction.............................................................................................................
........ 123
83D.6.2 Identification ...........................................................................................................
........ 123
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