Chapter 4 Interfaces; Supported Interfaces; Data Interfaces; Speed - Mellanox Technologies SB7700 User Manual

Rev 1.2
4 Interfaces
4.1

Supported Interfaces

The systems support the following interfaces:
• Data interfaces - InfiniBand
• 100/1000 MbE RJ45 management interface(s)
• USB
• 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".
4.1.1

Data Interfaces

The data interfaces use QSFP28 connectors. The full list of interfaces per system is provided in
Table 3, "Speed and Switching Capabilities," on page 10.
Each QSFP28 port can be connected with QSFP28 cable or connector for 40/56Gb/s/100Gb/s.
The system offers High Power class 4 transceivers support in all ports.
4.1.2

Speed

InfiniBand speed is auto-adjusted by the infiniBand protocol.
Mellanox systems support QDR/FDR10/FDR/EDR InfiniBand.
• 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.
• 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.
• EDR is an InfiniBand data rate, where each lane of a 4X port runs a bit rate of 25 Gb/s
with 64b/66b encoding, resulting in an effective bandwidth of 100 Gb/s.
4.1.3

RS232 (Console)

The port labeled "Console"
used for initial configuration and debugging. Upon first installation of the system, you need to
connect a PC to this interface and configure network parameters for remote connections. Refer to
Section 2.7.1 to view the full procedure.
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This interface is not found in externally managed systems.
is an RS232 serial port on the back side of the chassis that is
Interfaces