16 C
HAPTER
1: I
NTRODUCING THE
S
UPER
S
TACK
3S
WITCH
4400
Yellow The Module is installed and supported. The Link status has
not been determined or there is no Link for a single port
Module.
Yellow flashing A Module is installed, however, it is not supported.
Off The Module is not installed.
Unit LEDs
1–8 Green When the Switch forms a stack with other Switch 4400
units, the LED indicates the position of the unit in the stack
and that a link is present.
When the Switch is stand-alone and not part of a stack, LED
1ison.
Green rotating When a software upgrade is in progress, the Unit LEDs of the
unit that is being upgraded flash on and off in the following
sequence —
1,2,4,6,8,7,5,3 (24-port)
1,2,3,4,8,7,6,5 (48-port)
Green flashing The Switch physically forms a stack with other Switch 4400
units, but cannot be managed as part of that stack until all
units have been upgraded to software version 2.0 or later.
Off A fault has occurred.
Power/Self Test LED
Green The Switch is powered-up and operating normally.
Green flashing The Switch is either downloading software or is initializing
(which includes running a Power On Self Test).
Yellow The Switch has failed its Power On Self Test.
Off The Switch is not receiving power or there is a fault with the
Power Supply Unit.
LED Color Indicates
17204ua.book Page 16 Monday, August 13, 2001 11:28 AM
