Chapter 4 Interfaces; Supported Interfaces; Data Interfaces; Speed - Mellanox Technologies SX6710 Hardware User Manual

4 Interfaces
4.1

Supported Interfaces

The systems support the following interfaces:
• Data interfaces - InfiniBand
• 100/1000 MbE RJ45 management interface(s)
• USB port
• RS232 Console port
• I²C interface
• Reset button
• Status and Port LEDs
In order to review the full configuration options matrix, refer to Table 4, "Management Interfaces
and FRUs".
Note: I²C stands for Inter-Integrated Circuit. I²C is low speed serial bus, intended for
maintenance purposes.
4.1.1

Data Interfaces

The data interfaces use QSFP+connectors. The full list of interfaces per system is provided in
Table 3, "Speed and Switching Capabilities," on page 5.
Each QSFP+ port can be connected with QSFP+ cable or connector for 40/56Gb/s, or 10Gb/s
when connecting through Mellanox QSFP+ to SFP+ (QSA) adapters.
The system offers High Power/LR4 transceivers support in all ports.
4.1.2

Speed

InfiniBand speed is auto-adjusted by the infiniBand protocol.
Mellanox systems support FDR/FDR10 InfiniBand.
• FDR is an InfiniBand data rate, where each lane of a 4X port runs a bit rate of 14.0625
Gb/s with 64b/66b encoding, resulting in an effective bandwidth of 56.25 Gb/s.
• FDR10 is a non-standard InfiniBand data rate, where each lane of a 4X port runs a bit
rate of 10.3125 Gb/s with a 64b/66b encoding, resulting in an effective bandwidth of 40
Gb/s. FDR10 supports 20% more bandwidth over QDR due to better encoding rate.
• Both FDR and FDR10 support Forward Error Correction (FEC), as defined in IEEE
802.3ap chapter 74.
4.1.3

RS232 (Console)

The port labeled "Console"
used for initial configuration and debugging. Upon first installation of the system, you need to
This interface is not found in externally managed systems.
is an RS232 serial port on the back side of the chassis that is
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