Chapter 2 Interfaces; Infiniband Interface; Ethernet Qsfp28 Interface; Pci Express Interface - Mellanox Technologies ConnectX-5 User Manual

2 Interfaces
The adapter card includes special circuits to protect from ESD shocks to the card/server when
plugging copper cables.
Each adapter card includes the following interfaces:
• "InfiniBand Interface"
• "Ethernet QSFP28 Interface"
• "PCI Express Interface"
• "LED Interface"
2.1

InfiniBand Interface

The network ports of the ConnectX®-5 adapter cards are compliant with the InfiniBand Architec-
ture Specification, Release 1.3. InfiniBand traffic is transmitted through the cards' QSFP28 con-
nectors.
2.2

Ethernet QSFP28 Interface

The network ports of the ConnectX®-5 adapter card are compliant with the IEEE 802.3 Ethernet
standards listed in
cards' QSFP28 connectors.
2.3

PCI Express Interface

The ConnectX®-5 adapter card supports PCI Express Gen 3.0/4.0 (1.1 and 2.0 compatible)
through an x16 edge connector. The device can be either a master initiating the PCI Express bus
operations, or a slave responding to PCI bus operations.
The following lists PCIe interface features:
• PCIe Gen4.0 and 3.0 compliant, 2.0 and 1.1 compatible
• 2.5, 5.0, or 8.0, or 16.0 GT/s link rate x16
• Auto-negotiates to x16, x8, x4, x2, or x1
• Support for MSI/MSI-X mechanisms
2.4

LED Interface

There is one bi-color I/O LED per port located on the adapter card.For LED specifications,
please refer to
Rev 1.5
Table 4, "Features," on page
Section 7.8, "Adapter Card LED Operations", on page
Mellanox Technologies
10. Ethernet traffic is transmitted through the
61.
Interfaces
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