User manual

Rev 1.5

Mellanox Technologies

2.1.3 LED Assignment

The board has I/O LEDs located on the I/O panel- 2 LEDs per port. The green LED, when lit, indi-

cates that the driver is running and a valid physical connection between nodes exists. If the green

LED is blinking, it indicates a problem with the physical link. The yellow LED when lit, indicates

a valid data activity link, this is the logical link. The yellow LED lights up when the network is

discovered over the physical link. A valid data activity link without data transfer is designated by a

constant yellow LED indication. A valid data activity link with data transfer is designated by a

blinking yellow LED indication. If the LEDs are not active, either the physical link or the logical

link (or both) connections have not been established.

Figure 4: Physical and Logical Link Indications

2.1.4 I

C Compatible Interface

A three-pin header on the HCA Adapter card is provided as the I

C compatible interface. See

Appendix A,“Specifications,” on page 34 for the location on the board.

Figure 5: I

C Connector

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

Table 5 - LEDs

Port Number LED Name

Port 1 Physical Link - Green

Constant on indicates a good physical link

Blinking indicates a problem with the Physical

link

Data Activity - Yellow

Blinking indicates Data Transfer

Constant on indicates no Data Transfer

Port 2 Physical Link - Green