Technical data

26 Brocade VDX 6720 Hardware Reference Manual
53-1002084-06
POST and boot specifications
4
POST and boot specifications
When the switch is turned on or rebooted, the switch performs a power-on, self-test (POST). Total
boot time with POST can be several minutes. POST can be omitted after subsequent reboots by
using the fastboot command or entering the no diag post command to persistently disable POST.
For more information about these commands, refer to the Brocade Network OS Command
Reference.
Power supply
status(one LED
[green] per power
supply) (Brocade
VDX 6720-60)
Off (no light) Power supply is not receiving
power or is off.
Verify the power supply is on and
seated and the power cord is
connected to a functioning power
source.
Steady green Power supply is operating
normally.
Also, airflow mismatch or fault
may have been detected.
No action required.
Use the show environment command
to check the state of the power supply.
Blinking green Power supply is faulty. Try the following:
• Check the power cable
connection.
• Verify that the power supply is
powered on.
• Replace the power supply.
Fan status (one
bicolor LED
{green and
amber] per fan
assembly)(Broca
de VDX 6720-60)
Off (no light) Fan assembly is not receiving
power.
Try the following:
• Verify the fan assembly is seated
correctly.
• Verify the switch is powered on.
Steady green Fan assembly is operating
normally.
No action required.
Steady amber
(for more than 5
seconds)
Fan fault for one of the following
reasons:
• Mismatched airflow on fan
assemblies.
• One or more of the fans in
the fan assembly has failed
• The fan assembly was
disabled by the user
NOTE: When the switch is first
powered on, the fan
status LED will show
amber until POST has
completed.
Try the following:
• Verify that the airflow symbol and
part number on the replacement
fan matches the fans in the
chassis. Replace if necessary.
• Replace the fan assembly.
• Verify the fan assembly is enabled
(use the show environment fan
command).Re-enable if
necessary.
TABLE 4 Non-port side LED patterns during normal operation (Continued)
LED name LED color Status of hardware Recommended action