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GS4000 Installation Guide Revision 4.00
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(4) LEDs (Light Emitting Diode) and Switches
The LED of a chassis indicates the action status of a fan unit, BCU , PSU and high port-
density PSU-integrated NIF.
The LED is attached to the fan unit, and the status indicated by the LED differs depending on
the type of a device or the position where the fan unit is installed.
As for the status indicated by the each LED of a chassis, see Table 1.1-8. Refer to the section
"1.3 Power Supply," "1.4 Basic Control Unit (BCU)" or "1.6 Network Interface (NIF)" for the LED
and switches of other component units.
1-14
NOTE: The type of power supply redundancy changes to "3+1" if a high port-density
PSU-integrated NIF is activated after being mounted in a running GS4000. More
than three power supply modules should be installed in the GS4000 before any
high port-density PSU-integrated NIF is inserted in it.
NOTE: When the GS4000 is running with "3+1" power supply redundancy, and a high
port-density PSU-integrated NIF is pulled out from it whille the device is running,
the GS4000 will continue running in "3+1" redundancy mode.
However, if the GS4000 is rebooted before a high port-density PSU-integrated
NIF is re-installed into it, the power supply redundancy mode will be switched to
"2+2". ".
520-10-026-30X
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