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首页2018年IEEE 802.3cb标准:2.5Gbps和5Gbps以太网背板操作规范
2018年IEEE 802.3cb标准:2.5Gbps和5Gbps以太网背板操作规范
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更新于2024-07-05
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IEEE 802.3 cb 2018 是 IEEE (Institute of Electrical and Electronics Engineers) 于2018年发布的针对以太网标准的一个增补规格,正式名称为 "IEEE Standard for Ethernet Amendment 1: Physical Layer Specifications and Management Parameters for 2.5 Gb/s and 5 Gb/s Operation over Backplane"。这份标准由 LAN/MAN Standards Committee 赞助,旨在为2.5吉比特每秒 (Gbps) 和5 Gbps 的数据传输提供物理层规范和管理参数,特别适用于背板(backplane)环境中的高速以太网通信。
IEEE 802.3标准原本是定义以太网的基本技术框架,而 IEEE 802.3 cb 2018 是对其原有标准的补充,关注于提升网络速度和适应新的应用场景。它关注的重点在于优化信号在背板布线系统中的传输,这种布线系统通常用于数据中心的高密度服务器环境,例如机架之间或服务器内部的连接。通过引入新的物理层规范,标准考虑了更高的带宽需求、更低的延迟和更有效的信号完整性。
在物理层方面,IEEE 802.3 cb 提供了详细的技术指导,包括但不限于信号传输速率的实现方法、电缆类型和长度限制、阻抗匹配、串扰控制以及信号质量监控等,这些都是为了确保在高速数据传输时能够保持稳定和高效。此外,管理参数部分可能涉及电源管理、流量控制、错误检测和纠正机制,以支持2.5 Gb/s 和 5 Gb/s 这样的高数据速率。
IEEE Std 802.3 cb-2018 标准还强调了对网络管理的改进,以便于更好地监控和控制这些高速以太网的运行状态,确保系统的可靠性和可扩展性。该标准的批准日期为2018年9月27日,授权使用范围限于指定机构——东华师范大学,下载日期为2022年3月16日。
版权方面,所有权利归IEEE所有,任何使用都必须遵守相关许可协议,并受到下载自IEEE Explore网站的限制条件。这表明该标准是一个专业级别的技术文档,主要用于学术研究、工程实践和标准制定,而非一般公众的随意使用。
IEEE 802.3 cb 2018 是一项重要的技术更新,对于数据中心网络设计者、系统集成商和设备制造商来说,理解和遵循这一标准对于实现高性能、高效率的2.5 Gb/s 和 5 Gb/s 以太网通信至关重要。
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Copyright © 2019 IEEE. All rights reserved.
127.3.4.1 PMA PRBS9 test pattern (optional).......................................................................... 90
127.4 Compatibility considerations ...................................................................................................... 90
127.5 Delay constraints......................................................................................................................... 90
127.6 Environmental specifications...................................................................................................... 90
127.7 Protocol implementation conformance statement (PICS) proforma for Clause 127, Physical
Coding Sublayer (PCS) and Physical Medium Attachment (PMA) sublayer for 2.5 Gb/s
8B/10B 2.5GBASE-X.................................................................................................................
91
127.7.1 Introduction......................................................................................................................... 91
127.7.2 Identification....................................................................................................................... 91
127.7.2.1 Implementation identification................................................................................... 91
127.7.2.2 Protocol summary ..................................................................................................... 91
127.7.3 Major capabilities/options................................................................................................... 92
127.7.4 PICS proforma tables for the PCS and PMA sublayer, type 2.5GBASE-X....................... 92
127.7.4.1 PCS ........................................................................................................................... 92
127.7.4.2 Code-group functions ............................................................................................... 93
127.7.4.3 EEE ........................................................................................................................... 93
127.7.4.4 PMA functions.......................................................................................................... 94
127.7.4.5 Compatibility considerations .................................................................................... 94
128. Physical Medium Dependent sublayer and baseband medium, type 2.5GBASE-KX.......................... 95
128.1 Overview..................................................................................................................................... 95
128.2 Physical Medium Dependent (PMD) service interface .............................................................. 95
128.2.1 PMD_UNITDATA.request................................................................................................. 96
128.2.1.1 Semantics of the service primitive............................................................................ 96
128.2.1.2 When generated ........................................................................................................ 96
128.2.1.3 Effect of receipt ........................................................................................................ 96
128.2.2 PMD_UNITDATA.indication ............................................................................................ 96
128.2.2.1 Semantics of the service primitive............................................................................ 96
128.2.2.2 When generated ........................................................................................................ 96
128.2.2.3 Effect of receipt ........................................................................................................ 96
128.2.3 PMD_SIGNAL.indication .................................................................................................. 96
128.2.3.1 Semantics of the service primitive............................................................................ 96
128.2.3.2 When generated ........................................................................................................ 97
128.2.3.3 Effect of receipt ........................................................................................................ 97
128.2.4 PMD_RXQUIET.request.................................................................................................... 97
128.2.4.1 Semantics of the service primitive............................................................................ 97
128.2.4.2 When generated ........................................................................................................ 97
128.2.4.3 Effect of receipt ........................................................................................................ 97
128.2.5 PMD_TXQUIET.request.................................................................................................... 97
128.2.5.1 Semantics of the service primitive............................................................................ 97
128.2.5.2 When generated ........................................................................................................ 97
128.2.5.3 Effect of receipt ........................................................................................................ 98
128.3 PCS requirements for Auto-Negotiation (AN) service interface................................................ 98
128.4 Delay constraints......................................................................................................................... 98
128.5 PMD MDIO function mapping................................................................................................... 98
128.6 PMD functional specifications.................................................................................................... 99
128.6.1 Link block diagram............................................................................................................. 99
128.6.2 PMD transmit function ..................................................................................................... 100
128.6.3 PMD receive function ....................................................................................................... 100
128.6.4 PMD signal detect function .............................................................................................. 100
128.6.5 PMD transmit disable function ......................................................................................... 100
128.6.6 Loopback mode................................................................................................................. 100
128.6.7 PMD fault function ........................................................................................................... 101
Authorized licensed use limited to: East China Normal University. Downloaded on March 16,2022 at 11:08:06 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2019 IEEE. All rights reserved.
128.6.8 PMD transmit fault function ............................................................................................. 101
128.6.9 PMD receive fault function............................................................................................... 101
128.6.10PMD LPI function ............................................................................................................ 101
128.7 2.5GBASE-KX electrical characteristics.................................................................................. 102
128.7.1 Transmitter characteristics................................................................................................ 102
128.7.1.1 Test fixtures ............................................................................................................ 102
128.7.1.2 Test fixture characteristics ...................................................................................... 102
128.7.1.3 Signaling speed ....................................................................................................... 103
128.7.1.4 Output amplitude .................................................................................................... 103
128.7.1.5 Differential output return loss................................................................................. 104
128.7.1.6 Common-mode output return loss .......................................................................... 104
128.7.1.7 Transition time........................................................................................................ 105
128.7.1.8 Transmit jitter test requirements ............................................................................. 105
128.7.1.9 Transmit jitter ......................................................................................................... 105
128.7.2 Receiver characteristics .................................................................................................... 106
128.7.2.1 Receiver interference tolerance .............................................................................. 106
128.7.2.2 Signaling speed range ............................................................................................. 106
128.7.2.3 AC-coupling............................................................................................................ 106
128.7.2.4 Input signal amplitude ............................................................................................ 107
128.7.2.5 Differential input return loss................................................................................... 107
128.8 Interconnect characteristics....................................................................................................... 107
128.9 Environmental specifications.................................................................................................... 107
128.9.1 General safety ................................................................................................................... 107
128.9.2 Network safety.................................................................................................................. 107
128.9.3 Installation and maintenance guidelines ........................................................................... 107
128.9.4 Electromagnetic compatibility.......................................................................................... 107
128.9.5 Temperature and humidity................................................................................................ 107
128.10 Protocol implementation conformance statement (PICS) proforma for Clause 128, Physical
Medium Dependent sublayer and baseband medium, type 2.5GBASE-KX ............................ 108
128.10.1Introduction....................................................................................................................... 108
128.10.2Identification..................................................................................................................... 108
128.10.2.1 Implementation identification................................................................................. 108
128.10.2.2 Protocol summary ................................................................................................... 108
128.10.3Major capabilities/options................................................................................................. 109
128.10.4PICS proforma tables for Clause 128, Physical Medium Dependent (PMD) sublayer
and baseband medium, type 2.5GBASE-KX.................................................................... 109
128.10.4.1 PMD functional specifications................................................................................ 109
128.10.4.2 Management functions............................................................................................ 110
128.10.4.3 Transmitter electrical characteristics ...................................................................... 111
128.10.4.4 Receiver electrical characteristics........................................................................... 112
128.10.4.5 Environmental and safety specifications ................................................................ 112
129. Physical Coding Sublayer (PCS) and Physical Medium Attachment (PMA) sublayer for 5 Gb/s
64B/66B, type 5GBASE-R ................................................................................................................. 113
129.1 Overview................................................................................................................................... 113
129.1.1 Scope................................................................................................................................. 113
129.1.2 Relationship of 5GBASE-R to other standards ................................................................ 113
129.1.3 Summary of 5GBASE-R sublayers .................................................................................. 114
129.1.3.1 Physical Coding Sublayer (PCS) ............................................................................ 114
129.1.3.2 Physical Medium Attachment (PMA) sublayer...................................................... 114
129.1.4 Inter-sublayer interfaces ................................................................................................... 115
129.2 Physical Coding Sublayer (PCS) .............................................................................................. 115
129.2.1 Functions within the PCS ................................................................................................. 115
Authorized licensed use limited to: East China Normal University. Downloaded on March 16,2022 at 11:08:06 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2019 IEEE. All rights reserved.
129.2.2 Notation conventions ........................................................................................................ 116
129.2.3 Transmission order ........................................................................................................... 116
129.2.4 Low Power Idle................................................................................................................. 117
129.2.5 PCS used with 5GBASE-KR PMD .................................................................................. 118
129.3 Physical Medium Attachment (PMA) sublayer........................................................................ 118
129.3.1 Service Interface ............................................................................................................... 118
129.3.2 Functions within the PMA................................................................................................ 118
129.3.2.1 PMA transmit function ........................................................................................... 119
129.3.2.2 PMA receive function ............................................................................................. 119
129.3.3 PMA loopback mode (optional) ....................................................................................... 119
129.4 Compatibility considerations .................................................................................................... 119
129.5 Delay constraints....................................................................................................................... 119
129.6 Environmental specifications.................................................................................................... 119
129.7 Protocol implementation conformance statement (PICS) proforma for Clause 129, Physical
Coding Sublayer (PCS) and Physical Medium Attachment (PMA) sublayer for 5 Gb/s
64B/66B, type 5GBASE-R ...................................................................................................... 120
129.7.1 Introduction....................................................................................................................... 120
129.7.2 Identification..................................................................................................................... 120
129.7.2.1 Implementation identification................................................................................. 120
129.7.2.2 Protocol summary ................................................................................................... 120
129.7.3 Major capabilities/options................................................................................................. 121
129.7.4 PICS Proforma Tables for PCS, type 5GBASE-R ........................................................... 121
129.7.4.1 Coding rules ............................................................................................................ 121
129.7.4.2 Scrambler and Descrambler.................................................................................... 121
129.7.5 Test-pattern modes............................................................................................................ 122
129.7.5.1 Bit order .................................................................................................................. 122
129.7.6 Management...................................................................................................................... 122
129.7.6.1 State diagrams......................................................................................................... 123
129.7.6.2 Loopback ............................................................................................................... 123
129.7.6.3 Delay Constraints.................................................................................................... 123
129.7.6.4 Auto-Negotiation for Backplane Ethernet functions ............................................. 123
129.7.6.5 LPI functions........................................................................................................... 124
130. Physical Medium Dependent sublayer and baseband medium, type 5GBASE-KR........................... 125
130.1 Overview................................................................................................................................... 125
130.2 Physical Medium Dependent (PMD) service interface ............................................................ 125
130.2.1 PMD_UNITDATA.request............................................................................................... 126
130.2.1.1 Semantics of the service primitive.......................................................................... 126
130.2.1.2 When generated ...................................................................................................... 126
130.2.1.3 Effect of receipt ...................................................................................................... 126
130.2.2 PMD_UNITDATA.indication .......................................................................................... 126
130.2.2.1 Semantics of the service primitive.......................................................................... 126
130.2.2.2 When generated ...................................................................................................... 126
130.2.2.3 Effect of receipt ...................................................................................................... 126
130.2.3 PMD_SIGNAL.indication ................................................................................................ 126
130.2.3.1 Semantics of the service primitive.......................................................................... 126
130.2.3.2 When generated ...................................................................................................... 127
130.2.3.3 Effect of receipt ...................................................................................................... 127
130.2.4 PMD_RX_MODE.request................................................................................................ 127
130.2.4.1 Semantics of the service primitive.......................................................................... 127
130.2.4.2 When generated ...................................................................................................... 127
130.2.4.3 Effect of receipt ...................................................................................................... 127
130.2.5 PMD_TX_MODE.request ................................................................................................ 127
Authorized licensed use limited to: East China Normal University. Downloaded on March 16,2022 at 11:08:06 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2019 IEEE. All rights reserved.
130.2.5.1 Semantics of the service primitive.......................................................................... 127
130.2.5.2 When generated ...................................................................................................... 127
130.2.5.3 Effect of receipt ...................................................................................................... 128
130.3 PCS requirements for Auto-Negotiation (AN) service interface.............................................. 128
130.4 Delay constraints....................................................................................................................... 128
130.5 PMD MDIO function mapping................................................................................................. 128
130.6 PMD functional specifications.................................................................................................. 129
130.6.1 Link block diagram........................................................................................................... 129
130.6.2 PMD transmit function ..................................................................................................... 129
130.6.3 PMD receive function ....................................................................................................... 129
130.6.4 PMD signal detect function .............................................................................................. 129
130.6.5 PMD transmit disable function ......................................................................................... 130
130.6.6 Loopback mode................................................................................................................. 130
130.6.7 PMD_fault function .......................................................................................................... 131
130.6.8 PMD transmit fault function ............................................................................................. 131
130.6.9 PMD receive fault function............................................................................................... 131
130.6.10PMD LPI function ............................................................................................................ 131
130.7 5GBASE-KR electrical characteristics..................................................................................... 132
130.7.1 Transmitter characteristics................................................................................................ 132
130.7.1.1 Test fixture.............................................................................................................. 132
130.7.1.2 Test fixture characteristics ...................................................................................... 133
130.7.1.3 Signaling speed ....................................................................................................... 133
130.7.1.4 Output amplitude .................................................................................................... 133
130.7.1.5 Differential output return loss................................................................................. 134
130.7.1.6 Common-mode output return loss .......................................................................... 135
130.7.1.7 Transition time........................................................................................................ 135
130.7.1.8 Transmit jitter test requirements ............................................................................. 135
130.7.1.9 Transmit jitter ......................................................................................................... 136
130.7.1.10 Transmitter output waveform ................................................................................. 136
130.7.2 Receiver characteristics .................................................................................................... 137
130.7.2.1 Receiver interference tolerance .............................................................................. 138
130.7.2.2 Signaling speed range ............................................................................................. 138
130.7.2.3 AC-coupling............................................................................................................ 138
130.7.2.4 Input signal amplitude ............................................................................................ 138
130.7.2.5 Differential input return loss................................................................................... 138
130.8 Interconnect characteristics....................................................................................................... 139
130.9 Environmental specifications.................................................................................................... 139
130.9.1 General safety ................................................................................................................... 139
130.9.2 Network safety.................................................................................................................. 139
130.9.3 Installation and maintenance guidelines ........................................................................... 139
130.9.4 Electromagnetic compatibility.......................................................................................... 139
130.9.5 Temperature and humidity................................................................................................ 139
130.10 Protocol implementation conformance statement (PICS) proforma for Clause 130, Physical
Medium Dependent (PMD) sublayer and baseband medium, type 5GBASE-KR ................... 140
130.10.1Introduction....................................................................................................................... 140
130.10.2Identification..................................................................................................................... 140
130.10.2.1 Implementation identification................................................................................. 140
130.10.2.2 Protocol summary ................................................................................................... 140
130.10.3Major capabilities/options................................................................................................. 141
130.10.4PICS proforma tables for Clause 130, Physical Medium Dependent (PMD) sublayer
and baseband medium, type 5GBASE-KR....................................................................... 141
130.10.4.1 PCS requirements for AN service interface............................................................ 141
130.10.4.2 PMD functional specifications................................................................................ 142
130.10.4.3 Management functions............................................................................................ 143
Authorized licensed use limited to: East China Normal University. Downloaded on March 16,2022 at 11:08:06 UTC from IEEE Xplore. Restrictions apply.
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Copyright © 2019 IEEE. All rights reserved.
130.10.4.4 PMD Transmitter electrical characteristics............................................................. 143
130.10.4.5 Receiver electrical characteristics........................................................................... 144
130.10.4.6 Environmental specifications.................................................................................. 144
Annex 31B (normative) MAC Control PAUSE operation ......................................................................... 145
31B.3 Detailed specification of PAUSE operation............................................................................. 145
31B.3.7 Timing considerations for PAUSE operation ................................................................. 145
31B.4 Protocol implementation conformance statement (PICS) proforma for MAC Control
PAUSE operation..................................................................................................................... 146
31B.4.3 Major capabilities/options............................................................................................... 146
31B.4.6 PAUSE command MAC timing considerations ............................................................. 146
Annex 69A (normative) Interference tolerance testing .............................................................................. 147
69A.1 Introduction.............................................................................................................................. 147
69A.2 Test setup ................................................................................................................................. 147
69A.2.1 Pattern generator ............................................................................................................. 147
69A.2.2 Test channel .................................................................................................................... 148
69A.2.4 Transmitter control ......................................................................................................... 148
69A.3 Test methodology..................................................................................................................... 148
Annex 69B (normative) Interconnect characteristics ................................................................................. 149
69B.4 Channel parameters.................................................................................................................. 149
69B.4.1 Overview......................................................................................................................... 149
69B.4.2 Fitted attenuation ............................................................................................................ 149
69B.4.3 Insertion loss ................................................................................................................... 151
69B.4.4 Insertion loss deviation ................................................................................................... 153
69B.4.5 Return loss ...................................................................................................................... 155
69B.4.6 Crosstalk ......................................................................................................................... 156
69B.4.6.4 Insertion loss to crosstalk ratio (ICR) ................................................................... 156
Annex 127A (informative) Compatibility of 2.5GBASE-X PCS/PMA with 1000BASE-X PCS/PMA
running 2.5 times faster .................................................................................................................. 158
Annex 128A (normative) 2.5 Gb/s Storage Enclosure Interface (2.5GSEI)............................................... 159
128A.1 Overview.................................................................................................................................. 159
128A.1.1 Bit error ratio .................................................................................................................. 161
128A.2 2.5GSEI compliance point definitions ..................................................................................... 161
128A.3 2.5GSEI electrical characteristics ............................................................................................ 164
128A.3.1 2.5GSEI host output characteristics................................................................................ 164
128A.3.1.1 Signaling rate and range ....................................................................................... 164
128A.3.1.2 Signaling levels..................................................................................................... 165
128A.3.1.3 Output return loss.................................................................................................. 165
128A.3.1.4 Transmit jitter test requirements ........................................................................... 166
128A.3.1.5 Transmit jitter ....................................................................................................... 166
128A.3.1.6 Transmitter output noise and distortion ................................................................ 166
128A.3.2 2.5GSEI host input characteristics.................................................................................. 167
128A.3.2.1 Input differential return loss ................................................................................. 167
128A.3.2.2 Receiver interference tolerance ............................................................................ 167
128A.3.2.3 Receiver jitter tolerance ........................................................................................ 169
128A.3.3 2.5GSEI drive output characteristics .............................................................................. 170
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