16 C
HAPTER
1: I
NTRODUCING
THE
S
UPER
S
TACK
3 S
WITCH
4400
Ta b l e 5 LED behavior
LED Color Indicates
Port Status LEDs
Packet Green Full duplex packets are being transmitted/received on the
port.
Yellow Half duplex packets are being transmitted/received on the
port.
Off No packets are being transmitted/received on the port.
Status Green A high speed (100 Mbps) link is present, and the port is
enabled.
Green flashing A high speed (100 Mbps) link is present, but the port is
disabled.
Yellow A low speed (10 Mbps) link is present, and the port is
enabled.
Yellow flashing A low speed (10 Mbps) link is present, but the port is
disabled.
Off No link is present.
Module Packet LEDs
Green Full duplex activity being received or transmitted
Yellow Half duplex activity being received or transmitted
Off No activity
Module Status LEDs
Green The Module is installed and supported. The Link Status has
been determined, and the port is enabled.
Green flashing The Module is installed and supported. The Link Status has
been determined, but the port is disabled.
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
1 is on.
DUA1720-3AAA03_online.book Page 16 Monday, March 25, 2002 10:48 AM
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