3-3
Module status LEDs
An MPU provides one status LED for each module. For the description of the LED, see
NOTE:
The MPU and service module slot numbers are marked on the ejector lever pillow blocks at the left
and right sides of the slots. The fabric module slot number is marked above the slot.
Table 3-6 Module status LED description
ALM
Description
Flashing green (once
every two seconds)
The module is operating correctly.
Flashing green (four
times per second)
The module is loading software.
If the LED keeps flashing green four times per second, the software versions of
the device and the module do not match.
Steady green
The module is starting up.
Steady red
A warning or error alarm was triggered or the module is faulty.
Flashing red (once
every four seconds)
The temperature of the module is higher than the warning threshold or lower than
the low-temperature threshold.
Off
The module is not in position or the module is faulty.
MPU active/standby status LED
An MPU has one LED to indicate the active or standby status of the MPU.
Table 3-7 MPU active/standby LED description
LED status
Description
On
The MPU is active.
Off
•
The MPU is in standby status.
•
The MPU is faulty. Examine the module LED for an MPU problem.
Service module LEDs
The device supports multiple types of services modules. The service modules provide different types
and numbers of LEDs.
SFP+ port LEDs
A LED is provided for each SFP+ port to indicate the link status and data receiving/transmitting
status of the SFP+ ports.
Table 3-8 SFP+ port LED description
LED status
Description
Flashing
The SFP+ port is receiving or sending data.
