Brocade Communications Systems VDX 6940 Series, Hardware Installation Manual, Page: 73 / 136

Operation
● Interpreting LED activity.................................................................................................. 73
● POST and boot specifications.........................................................................................81
● Interpreting POST results................................................................................................82
● Diagnostic tests...............................................................................................................82
● Device management....................................................................................................... 83
● Powering off the device...................................................................................................83
● Thermal operations......................................................................................................... 83
Interpreting LED activity
System activity and status can be determined through the activity of the LEDs on the device.
There are three possible LED states: off (no light), a steady light, and a flashing light. Flashing lights
may be slow, fast, or flickering. The LED colors are either green or amber. Refer to
Port-side LED
patterns on page 76 and Non-port-side LED patterns on page 78 for details on LED behavior.
Sometimes, the LEDs flash either of the colors during boot, POST, or other diagnostic tests. This is
normal; it does not indicate a problem unless the LEDs do not indicate a healthy state after all boot
processes and diagnostic tests are complete.
LED locations
LEDs are located on the port side of the device to indicate power, system, and port status. LEDs on the
non-port side of the device indicate fan assembly and power supply status.
VDX 6940-36Q LED locations
The following figure illustrates status LEDs on the port side of the Brocade VDX 6940-36Q. These LEDs
perform the following functions:
• Two LEDs under the RJ-45 Ethernet port indicate link activity and status.
• Two LEDs in the upper left corner of the panel (above the USB port) indicate system status and
power-on status.
• Four LEDs above the upper 40 GbE ports and below the lower 40 GbE ports indicate GbE port status
and activity. When in 40 GbE mode, the first LED indicates 40 GbE port status and activity. When in
4x10 GbE breakout mode, each LED indicates status and activity of individual 10 GbE interfaces.
Brocade VDX 6940 Hardware Installation Guide 73
53-1003495-02