Nvidia Mellanox MSB7700-EB2F, Hardware User Manual, Page: 32 / 89

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Interfaces
The systems support the following interfaces:
Data interfaces - InfiniBand
10/100/1000 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 Management Interfaces, PSUs and
Fans .
Data Interfaces
The data interfaces use QSFP28 connectors. The full list of interfaces per system is provided
in Speed and Switching Capabilities .
Each QSFP28 port can be connected with QSFP28 cable or connector for 40/56/100 Gb/s. The
system offers High Power class 4 transceivers support in all ports.
Speed
InfiniBand speed is auto-adjusted by the infiniBand protocol. NVIDIA 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.
I2C/RS232 (Console)
The port labeled “Console ” is an RS232 serial port on the back side of the chassis that is
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 Configuring Network Attributes to view the full procedure.
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• This interface is not found in externally managed systems.
Apart from the initial configuration, the I²C interface is made exclusively for
debugging and troubleshooting. Only FAEs are authorized to connect through it.
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