Interfaces | NVIDIA ConnectX-4 InfiniBand/Ethernet Adapter Cards User Manual

InfiniBand Interface

The network ports of the ConnectX®-4 adapter cards are compliant with the InfiniBand Architecture Specification, Release 1.3. InfiniBand traffic is transmitted through the cards' QSFP28 connectors.

Ethernet QSFP28 Interface

The network ports of the ConnectX®-4 adapter card are compliant with the IEEE 802.3 Ethernet standards listed in Features and Benefits. Ethernet traffic is transmitted through the cards' QSFP28 connectors.

PCI Express Interface

The ConnectX®-4 adapter card supports PCI Express Gen 3.0 (1.1 and 2.0 compatible) through an x8 or x16 edge connector. The device can be either a master initiating the PCI Express bus operations, or a subordinate responding to PCI bus operations. The following lists PCIe interface features:

PCIe 3.0 compliant, 2.0 and 1.1 compatible
2.5, 5.0, or 8.0, link rate x8/x16
Auto-negotiates to x16, x8, x4, x2, or x1
Support for MSI/MSI-X mechanisms

LED Interface

There is one bi-color I/O LED per port to indicate link status. LED behavior is described below for Ethernet and InfiniBand port configurations.

Physical and Logical Link Indications - Ethernet Protocol:

LED Color and State

Description

Off

A link has not been established

Beacon command for locating the adapter card

1Hz blinking Yellow

Error

4Hz blinking Yellow Indicates an error with the link. The error can be one of the following:

Error Type	Description	LED Behavior
I²C	I²C access to the networking ports fails	Blinks until error is fixed
Over-current	Over-current condition of the networking ports	Blinks until error is fixed

Solid green

Indicates a valid link with no active traffic

Blinking green

Indicates a valid logical link with active traffic

Physical and Logical Link Indications - InfiniBand Protocol:

LED Color and State

Description

Off

A physical link has not been established

Solid amber

Indicates an active physical link