Switch 4400 — Front View Detail 17
connector that allows both the transmit and the receive fibers to be connected in the same space as an RJ-45 port.LEDs Table4 lists LEDs visible on the front of the Switch, and how to read their status according to color. For information on using the LEDs for problem solving, see “Solving Problems Indicated by LEDs” on page 58.Tabl e 4 LED behavior
LED Color Indicates
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
or
A port has failed and has been automatically disabled. You
can verify this by checking that the Port Status LED is quickly
flashing Yellow. If a port fails the Switch passes its Power On
Self Test and continues to operate normally.
Off The Switch is not receiving power or there is a fault with the
Power Supply Unit.
Port 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 (not 4400 FX).
Yellow flashing A low speed (10 Mbps) link is present, but the port is
disabled (not 4400 FX).
Yellow flashing
(fast)
The port has failed and has been automatically disabled. The
Switch passes its Power On Self Test and continues to
operate normally even if one or more ports are disabled.
Off No link is present.
DUA1720-3AAA07.book Page 17 Wednesday, March 17, 2004 1:14 PM