User manual

Adapter Card InterfacesRev 1.7

Mellanox Technologies

2.1.1 Ethernet Interface

The network ports of the ConnectX®-3 adapter cards are compliant with the IEEE 802.3 Ethernet

standards listed in Section 1.1.1, “10 and 40 Gigabit Ethernet,” on page 10. Ethernet traffic is

transmitted through the cards' QSFP+ connectors.

2.1.2 PCI Express Interface

The ConnectX®-3 adapter cards support PCI Express 3.0 (1.1 and 2.0 compatible) throughanx8

edge connector. The device can be either a master initiating the PCI Express bus operations or a

slave responding to PCI bus operations.

2.1.3 LED Assignment

There are two I/O LEDs per port in dual-port designs. See Table 4 for different LED functions.

Table 4 - Physical and Logical Link Indication

LED Function

Green - physical link • Constant on indicates a good physical link

• If neither LED is lit, then the physical

link has not been established

Yellow -

logical (data activity

link

)

• A blinking yellow indicates activity (data transfer)

• Stays off when there is no activity

The short bracket has the same port and LED footprints as the tall bracket.

2.1.4 I

C-compatible Interface

A three-pin header on the adapter cards is provided as the I

C-compatible interface. See Figure 10,

“Mechanical Drawing of the Dual-port MCX314A-BCBT Adapter Card,” on page 33 for the loca-

tion on the board.

Figure 5: I

C-compatible Connector