Basic Operation
Rev 1.1
Mellanox Technologies
20
The LED indicator, corresponding to each data port, will light orange when the physical connec-
tion is established (that is, when the unit is powered on and a cable is plugged into the port with
the other end of the connector plugged into a functioning port). When a logical connection is
made the LED will change to green. When data is being transferred the light will blink green.
2.3
Air Flow
These switches can come with two air flow patterns. The two patterns are:
•
Connector side inlet to power side outlet
•
Power side inlet to connector side outlet
The air flow is specified in the product model number. See “Mellanox Part Numbering Legend”
on page 9.On the PS unit and fan modules the air flow direction can be seen on the power side
panel. All components need to have the same air flow. A mismatch in the air flow will affect the
heat dissipation.
Table 9 - Connector Physical and Logical Link Assignments for IB
LED Status
LED Description
Off
No power to the port.
Solid Green
Logical link is up.
Flashing Green
Data activity flashing speed is proportional to data transfer speed.
Solid Orange
Physical link is up.
Flashing Orange
A problem with the physical link.
All PS units must have the same air flow as the fan module.
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