以太网链路连接

2.3 SFP/SFP+ 2.3.1 光 SFP/SFP+
2.3.1.1 1000Base-X SFP with SerDes Interface (1.25Gbps)
标准：INF-8074
2.3.1.2 10GBase-X SFP+ with SFI Interface (10.3125Gbps)
Switch/MAC w/ SerDes Interface
需外接 PHY，用于 RGMII to SerDes 转换。
Port w/ internal PHY
Copper
双绞线 RJ45 端口。
4、应用场景
4.1 网卡
方案根据下面两个要素进行设计： （1) （2) 主芯片提供的”Switch/MAC“接口； 网卡对外的连接器类型： RJ45, SFP/SFP+模块；
说明：另外一种称呼，Media Converter
2.2.8 RGMII-SGMII Slave Mode for 10/100/1000Base-T SFP
2.2.9 Dual Media with SGMII/SerDes Pass-Through Interface
说明：
(1) (2)
PHY 具有媒介自动检测功能，从而根据检测结果调整与 Switch/MAC 接口的工作模式。
1.5 光模块架构 1.5.1 XENPAK/X2/XPAK
1.5.2 SFP
1.5.3 SFP+
1.6 电模块架构
参看【2.3.2】
2、构建块
2.1 Switch/MAC
(1) 一般 Switch 的端口采用 SerDes 方式与外界相连，支持 SerDes 和 SGMII 模式。其带有 Internal SerDes PHY，可支持 SerDes 和 SGMII 的自动检测（需启用自动协商），也可配
置成某一种模式。
(2) 应用：例如：BCM56334。
2.2 PHY 2.2.1 Copper to RGMII
Switch/MAC 接口可以是：GMII/RGMII/RTBI/SGMII 等。
2.2.2 1000Base-X to RGMII
2.2.3 100Base-FX(Copper Interface) to RGMII
1.4 接口架构 1.4.1 10GBase-X (XAUI)
1.4.2 10GBase-CX4
1.4.3 10GBase-KX4
1.4.4 10GBase-KR (10GBase-R/SFI)
1.4.5 1000Bቤተ መጻሕፍቲ ባይዱse-KX
1.4.6 1000Base-T
1.4.7 SGMII
1.4.8 RvMII
3.2 MAC(CPU)
CPU 端口 SGMII/SerDes PHY 对端单元 媒介 Copper 协议 SGMII 备注 双绞线 RJ45 端口。
SGMII/SerDes SGMII/SerDes SGMII/SerDes RGMII RGMII
SFP SFP+ Switch/MAC w/ SerDes Interface PHY SFP (Fiber)
0、参考文档
1、规范标准
1.1 接口
接口名称 MII RMII RvMII GMII RGMII TBI RTBI SGMII SerDes SerDes Pass-Through 10/100/1000Base-T 100Base-FX SerDes 1000Base-T 1000Base-X 1000Base-CX 位置 Switch/MAC 100 Switch/MAC 100 Switch/MAC 100 Switch/MAC 1000 Switch/MAC 1000 Switch/MAC 1000 Switch/MAC 1000 Switch/MAC 1000 Switch/MAC 1000 Switch/MAC 1000 Media Media Media Media Media Media 10/100/1000 100 1000 1000 1000 1000 1000BASE-CX over specially shielded 150 balanced copper jumper cable assemblies as specified in IEEE 802.3 Clause 39 IEEE 802.3ap Physical Layer specification for 1 Gb/s using 1000BASE-X encoding over an electrical backplane as specified in IEEE 802.3 Clause 70 PICMG 3.1 electrical specification for transmission of 1 Gb/s Ethernet or 1 Gb/s Fibre Channel encoded data over the backplane An IEEE 802.3 physical coding sublayer for 10 Gb/s operation over XAUI and four lane PMDs as per IEEE 802.3 Clause 48 IEEE 802.3 Physical Layer specification for 10 Gb/s using 10GBASEX encoding over four lanes of 100 shielded balanced copper cabling as specified in IEEE 802.3 Clause 54 IEEE 802.3ap Physical Layer specification for Fiber Copper 速率 规范 备注
应用场合： Combo 接口。例如： Nu-310C 发包器。
2.2.10 Dual Media with RGMII/RTBI Interface
2.2.11 Fiber Only to Switch/MAC
说明：此场景使用于不能提供 SGMII/SerDes 接口的 Swtich/MAC。
2.2.12 SerDes to SerDes (SerDes Pass-Through)
10GBase-LX4
Media
10000
10GBase-R 10GBase-KR
Media Media
10000 10000
1.2 光模块
模块类型 XENPAK X2 XPAK SFP+ SFP GBIC 高速 MAUI 协议 XAUI XAUI XAUI SFI SerDes SerDes 规范 A cooperation agreement for 10 Gigabit Ethernet Transceiver package Rev 3.0 A cooperation agreement for a small Versatile 10 Gigabit Ethernet Transceiver package Rev 2.0b A cooperation agreement for a small form factor pluggable 10 Gigabit Ethernet Transceiver package Rev 2.2 SFF-8431 Specifications for Enhanced 8.5 and 10 Gigabit Small Form Factor Pluggable Module SFP+ rev 1.0 INF-8074i Specification for SFP (Small Formfactor Pluggable) Transceiver Rev 1.0 SFF-8053 Specification for GBIC (Gigabit Interface Converter) Rev 5.5
2.2.4 100Base-FX(Fiber Interface) to RGMII
2.2.5 10/100/1000Base-T to SGMII
2.2.6 100Base-FX(Copper Interface) to SGMII
2.2.7 1000Base-T to 1000Base-X(SerDes) (GBIC)
参看【2.2.7】
3、连接
3.1 Switch
交换端口 SGMII/SerDes SGMII/SerDes SGMII/SerDes SGMII/SerDes PHY SFP SFP+ Switch/MAC w/ SerDes Interface 对端单元 媒介 Copper Copper/Fiber Fiber 协议 SGMII SGMII/SerDes SerDes SerDes 如果对端无 SerDes 直 接接口，可外接 PHY 用于对端接口到 SerDes 接口的转换。 RGMII RGMII PHY SFP (Fiber) Copper Fiber 需外接 PHY，用于 RGMII to SerDes 转换。 RGMII SFP (Copper) Copper 需外接 PHY，用于 RGMII to SGMII 转换。 备注
1.3 电模块
模块类型 SFP SFP 高速 MAUI 协议 SerDes SGMII 规范 INF-8074i Specification for SFP (Small Formfactor Pluggable) Transceiver Rev 1.0 INF-8074i Specification for SFP (Small Formfactor Pluggable) Transceiver Rev 1.0
标准：SFF-8341, SFF-8342
2.3.2 电 SFP
2.3.2.1 10/100/1000Base-T SFP with SGMII Interface
参看【2.2.5】
2.3.2.2 1000Base-T SFP with SGMII Interface
参看【2.2.7】
2.3.2.3 1000Base-T SFP with SerDes Interface
Copper/Fiber Fiber Copper Fiber
SGMII/SerDes SerDes SerDes
需外接 PHY，用于 RGMII to SerDes 转换。
RGMII
SFP (Copper)
Copper
需外接 PHY，用于 RGMII to SGMII 转换。 SerDes
RGMII
1000Base-KX
Media
1000
1000Base-BX
Media
1000
10GBase-X
Media
10000
10GBase-CX4
Media
10000
10GBase-KX4
Media
10000
10 Gb/s using 10GBASE-X encoding over an electrical backplane as specified in IEEE 802.3 Clause 71 10GBase-BX4 Media 10000 PICMG 3.1 electrical specification for transmission of 10 Gb/s Ethernet or 10 Gb/s Fibre Channel encoded data over the backplane IEEE 802.3 Physical Layer specification for 10 Gb/s using 10GBASEX encoding over four WWDM lanes over multimode fiber as specified in IEEE 802.3 Clause 54 SFI IEEE 802.3ap Physical Layer specification for 10 Gb/s using 10GBASE-R encoding over an electrical backplane as specified in IEEE 802.3 Clause 72
考虑是否增加 PHY 用于接口转换。