The systems support the following interfaces:
- Data interfaces - InfiniBand
- 10/100/1000 MbE RJ45 management interface(s)
- 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.
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.
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.
The RS232 serial “Console” port is labeled.
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.
- 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.
Only original NVIDIA cables supplied with the switch package can be used to connect a switch system to the server.
Connecting any cable other than the NVIDIA supplied console cable may cause an I²C hang. Using uncertified cables may damage the I²C interface.
Refer to the Replacement Parts Ordering Numbers appendix for harness details.
The RJ45 Ethernet “MGT” port is labeled.
The RJ45 Ethernet ports provide access for remote management. The management ports are configured with auto-negotiation capabilities by default (100MbE to 1000GbE). The management ports’ network attributes (such as IP Address) need to be pre-configured via the RS232 serial console port or by DHCP before use. Refer to Configuring Network Attributes to view the full procedure.
The USB interface is USB 2.0 compliant and can be used by MLNX-OS software to connect to an external disk for software upgrade or file management. The connector comes in a standard USB shape.
To view the full matrix of the USB configuration options, refer to Management Interfaces, PSUs and Fans.
- USB 1.0 is not supported.
- Do not use excessive force when inserting or extracting the USB disk to and from the connector.
The reset button is located on the rear side of the system next to the fan status LEDs. This reset button requires a tool to be pressed.
- To reset the system and the CPU of its management board, push the Reset button and keep it pressed for up to 15 seconds.
- To reset the system, the CPU of its management board and the “admin” password, push the Reset button and keep it pressed for at least 15 seconds. You will then be able to enter without a password and set a new password for the user “admin”. In the externally managed systems, the Reset button resets the device.
See LED Notifications.