DES-3550 Layer 2
Fast Ethernet Switch User’s Guide
17
Front-Panel Components
The front panel of the Switch consists of LED indicators for power and for each 10/100 Mbps
twisted-pair ports, and two 1000BASE-T Mini-GBIC ports.
DES-3550
Figure 1- 1. Front Panel View of the DES-3550 as shipped
Comprehensive LED indicators display the status of the Swtch and the network.
LED Indicators
The LED indicators of the Switch include
Power
,
Console
,
Link/Act
,
Speed
, and
FDX.
This
Switch also includes a
LED Mode
button, which has the default setting set to
Link/Act
. The
user may scroll through to show the LED status for
Link/Act
,
Speed
, and
FDX
of each port.
The following shows the LED indicators for the Switch along with an explanation of each
indicator.
Figure 1- 2. LED Indicators
Power
This LED will light green after the Switch is powered on to indicate the ready state of
the device. The indicator is dark when the Switch is powered off.
Console
This LED should blink during the Power-On Self Test (POST). When the POST is
finished, the LED goes dark. This indicator is lit solid green when the Switch is being
logged into via out-of-band/local console management through the RS-232 console
port in the back of the Switch using a straight-through serial cable.
RPS
This LED will be lit when the redundant power supply is present and in use.
Otherwise, it will remain dark.
Port LEDs
One row of LEDs for each port is located above the ports on the front panel. The first
LED is for the top port and the second one is for the bottom ports. The LED will light
green when there is a secure connection to a device from the corresponding port.
This LED will blink when there is activity on the port.
Gigabit
Ports
The Switch’s two Mini GBIC ports have their own corresponding LEDs. The LED will
light green when there is a secure connection to a device from the corresponding
port. This LED will blink when there is activity on the port.