Specifications
Rev 2.5
64
Mellanox Technologies
7.6
Adapter LEDs Operations
There are two I/O LEDs s, LED0 and LED1, per port to indicate link status and speed. LED0 is
bi-color (yellow and green) LED and LED1 is a single color (green) LED
.
See
Table 14
.
Table 15 - Physical and Logical Link Indications
LED
Function
LED Signals
LED0 - Physical
link speed
• A constant Green indicates physical link with the high-
est rated speed.
• A constant Yellow indicates physical link with degraded
speed.
• If LED0 is off, then the physical link has not been
established.
Port 1:
LED0=D3,
LED1=D4
Port 0:
LED0=D1,
LED1=D2
LED1 - Logical
link/activity
• A constant Green indicates a valid logical (data activity)
link without data transfer.
• A blinking Green indicates a valid logical link with data
transfer.
• If LED1 is off, then the logical link has not been estab-
lished.