Interfaces
Rev 2.6
16
Mellanox Technologies
2
Interfaces
Each adapter card includes the following interfaces:
•
• “PCI Express Interface”
• “LED Interface”
The adapter cards include special circuits to protect from ESD shocks to the card/server when
plugging copper cables.
2.1
Ethernet QSFP28 Interface
The network ports of the ConnectX®-4 adapter card are compliant with the IEEE 802.3 Ethernet
standards listed in
Table 4, “Features,” on page 14
. Ethernet traffic is transmitted through the
cards' QSFP28 connectors.
2.2
PCI Express Interface
The ConnectX®-4 adapter card supports PCI Express 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 opera-
tions, or a slave responding to PCI bus operations. The following lists PCIe interface features:
• PCIe Gen 3.0 compliant, 1.1 and 2.0 compatible
• 2.5, 5.0, or 8.0 GT/s link rate x8/x16
• Auto-negotiates tox16, x8, x4, x2, or x1
• Support for MSI/MSI-X mechanisms
2.3
LED Interface
There is a one bi-color I/O LED per port located on the adapter card.
For LED specifications,
p
lease refer to
