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The systems support the following interfaces:

  • Data interfaces - Ethernet: 1/10/25/40/50/56/100GbE 
  • USB port (mini USB in SN2100) 
  • RS232 Console port 
  • Management interface(s) (Eth. RJ45) – 100MbE/1GbE
  • 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 a QSFP28 cable or connector for 25/40/50/56/100GbE, or 1/10/25GbE when connecting through NVIDIA QSFP28 to SFP28 (Dynamix QSA™) adapters, hybrid or split cables. The systems offer support of up to 3.5W transceivers in all QSFP28 ports, and support of up to 1.5W in all SFP28 ports.

Some QSFP28 ports and SFP28 ports support higher power consumption transceivers, as detailed in the following table:

High Power/LR4 Transceivers Support

Model FamilyPortsMaximum High Power Support
SN27001, 2, 31, 325.0W(b)
SN24101, 2, 47, 48(c)2.5W(a)
49, 50, 55, 565.0W(b)
SN21001, 2, 15, 165.0W(b)
SN201019, 20, 21, 224.5W(a)
1, 2, 17, 18(c)2.5W
SN220152,53    3.5W
49, 515W

Notes:
a. 4.5W high power modules are supported on NVIDIA Onyx (MLNX-OS) from version 3.6.3004 onwards.
b. 5.0W high power modules are supported on NVIDIA Onyx (MLNX-OS) from version 3.x.1xxx onwards for 100GbE Fiber Optics up to 80km.
c. SFP28 ports.


Using 5.0W Modules on Ports 49, 50, 55, 56 in SN2410M/SN2410bM

Supported Passive Cables in SN2010bM

  • For server ports: 
    • 25GbE cables (all ports can be used): 
      • 1m-1.5m: any DAC 
      • 2m: MCP2M00-A002E30N 
      • 2.5m: MCP2M00-A02AE26N 
      • 3m: MCP2M00-A003E26N 
    • 10GbE cables (all ports can be used):  
      • 0.5m to 5m: any DAC 
  • For IPL ports (SN2010 to SN2010 connection):  
    • 40/100GbE cables (all ports can be used): 
      • No limitations 
    • 25GbE cables (only ports 3, 6, 9, 12, 15, 18 can be used) 
      • Up to 2m: any DAC 
    • 10GbE cables (all ports can be used): 
      • 0.5m to 5m: any DAC 
  • For connections with other switches: 
    • AOCs/Transceivers only

Supported 25GbE and 40/100GbE Cables on IPL Ports (SN2010 to SN2010 Connection)

Speed

Ethernet speed must be set manually. The system’s ports can be manually configured to run at speeds ranging from 10GbE to 100GbE (for more details, see Specifications). To change the port speed configuration, use the command “speed” under interface configuration mode. Refer to the NVIDIA Onyx (MLNX-OS) User Manual for instructions on port speed re-configuration.

I2C/RS232 (Console)

The port labeled “Console” is an RS232 serial port on the back side of the chassis in SN2700 and SN2410, and on the front side in SN2740, SN2201 and SN2100/SN2010. It 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 Using NVIDIA Onyx (MLNX-OS) 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.

Management

The RJ45 Ethernet ports labeled “MGT ” provide access for remote management. The management ports are configured with auto-negotiation capabilities by default (100MbE to 1GbE). 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 Using NVIDIA Onyx (MLNX-OS) to view the full procedure.

In the SN2100/SN2010 systems there is only one MGT port.
Make sure you use only FCC compliant Ethernet cables.

USB

The USB interface is USB 2.0 (mini USB in SN2100) compliant (USB 1.0 is not supported) and can be used by NVIDIA Onyx (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.

Do not use excessive force when inserting or extracting the USB disk to and from the connector.

Reset Button

The reset button is located on the rear side of the system next to the fan status LEDs in SN2700 and SN2410, and on the front side in SN2740, SN2201 and SN2100/SN2010. This reset button requires a tool to be pressed.

Do not use a sharp pointed object such as a needle or a push pin for pressing the reset button. Use a flat object to push the reset button.

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. When using a NVIDIA Onyx (MLNX-OS) based system, this should allow you to enter without a password and set a new password for the user “admin”.

For Cumulus Linux password reset instructions, please refer to the Single User Mode - Boot Recovery section in the Cumulus Linux User Guide.

Status and Port LEDs

See LED Notifications.