This section describes the product's supported interfaces. Each numbered interface that is referenced in the figures is described in the following table with a link to detailed information.
The below figures are for illustration purposes only and might not reflect the current revision of the DPU.
Product Layout and Interface Information
|1||"Multi-Host Board"||External Multi-host board with a connectivity of up to 4 standard servers.|
|2||"OCP 3.0 card"||The multi-host board populates an OCP 3.0 card.|
|3||“PCI Express Interface”||PCIe Gen 3.0/4.0 through an edge connector.|
Used to connect the Multi-host board to the MiniSAS Auxiliary cards using the supplied harnesses.
|5||“Networking Port"||InfiniBand or Ethernet traffic is transmitted through the OCP 3.0 card networking connectors. The networking connectors allow for the use of modules, optical and passive cable interconnect solutions.|
|6||“Mini USB Type B Interface”||Mounted on the multi-host board for OS image loading.|
|7||“NC-SI Management Interface”||BMC connection for remote management|
|8||“1GbE OOB Management Interface”||1GbE BASE-T OOB management interface.|
|9||“External PCIe Power Supply Connector”||An external 12V power connection through an 8-pin ATX connector|
Interfaces Detailed Description
The Multi-Host OCP 3.0 board enables connecting up to four standard servers to a single multi-host network adapter.
OCP 3.0 Card
The Multi-host board can populate an OCP 3.0 adapter card. The card is not included in the package.
PCI Express Interface
The multi-host board supports PCI Express Gen 3.0/4.0 (1.1 and 2.0 compatible) through edge connectors. The following lists PCIe interface features:
- PCIe Gen 4.0 and 3.0 compliant, 2.0 and 1.1 compatible
- 2.5, 5.0, or 8.0, or 16.0 GT/s link rate
- Auto-negotiates to x16, x8, x4, x2, or x1
- Support for MSI/MSI-X mechanisms
The Mini-SAS connectors are used to connect the Mini-SAS auxiliary cards with the multi-host board using the supplied harnesses.
The MiniSAS auxiliary cards are shipping with short brackets assembled on the card.
The network ports of the OCP 3.0 card are compliant with the IEEE 802.3 InfiniBand and Ethernet standards. InfiniBand and Ethernet traffic is transmitted through the cards' networking connectors.
NC-SI Management Interface
The multi-host board enables the connection of a Baseboard Management Controller (BMC) to a set of Network Interface Controller (NICs) for the purpose of enabling out-of-band remote manageability. The NC-SI management is supported over RMII and has a connector on the multi-host board. NC-SI over the RMII interface is routed through the RMII connector with a flat cable. The cable Please refer to NC-SI Management Interface for pins.
Mini USB Type B Interface
The Multi-host board incorporates a Mini USB Type B connector. The purpose of the USB connector is to load operating system images. In order to use this interface, please use the supplied USB cable in the package.
1GbE OOB Management Interface
The multi-host incorporates a 1GbE RJ45 out-of-band port that allows the network operator to establish trust boundaries in accessing the management function to apply it to network resources. It can also be used to ensure management connectivity (including the ability to determine the status of any network component) independent of the status of other in-band network components. Use an RJ45 cable to connect to the 1GbE OOB management interface.
RJ45 Cable for the 1GbE OOB Management Cable
1GbE OOB Management LEDs Interface
The multi-host board incorporates a 1GbE RJ45 out-of-band port that allows the network operator to establish trust boundaries in accessing the management function to apply it to network resources. It can also be used to ensure management connectivity (including the ability to determine the status of any network component) independent of the status of other in-band network components.
There are two I/O LEDs, LED1 is green and LED2 is Amber, to indicate link activity as described in the below table.
Link ON (Any speed)
Activity (RX, Tx)
External PCIe Power Supply Connector
The Multi-host board requires an external 12V power connection through an 8-pin ATX connector to power up. The external power supply source is not included in the package.
For the external PCIe power supply pins, please refer to External PCIe Power Supply Connector Pins.