1-4
Catalyst 2350 Switch Hardware Installation Guide
OL18479-01
Chapter 1 Overview
Front Panel Description
System LED
The System LED shows whether the system is receiving power and is functioning properly.
For information on the System LED colors during power-on self-test (POST), see the
.
Port LEDs and Modes
Each Ethernet port and 10-Gigabit Ethernet module slot has a port LED. These port LEDs, as a group or
individually, display information about the switch and about the individual ports. The port mode
determines the type of information displayed through the port LEDs.
To select or change a mode, press the Mode button until the desired mode is highlighted. When you
change port modes, the meanings of the port LED colors also change.
Table 1-2
System LED
Color
System Status
Off
System is not powered on.
Green
System is operating normally.
Amber
System is receiving power but is not functioning properly.
Table 1-3
Port Mode LEDs
Mode LED
Port Mode
Description
STAT
Port status
The port status. This is the default mode.
DUPLX
Port duplex mode
The port duplex mode: full duplex or half duplex.
Note
The 10/100/1000 ports operate only in full-duplex
mode.
SPEED
Port speed
The port operating speed: 10, 100, or 1000 Mb/s.
Table 1-4
Meanings of Switch LED Colors in Different Modes
Port Mode
Port LED Color
Meaning
STAT
(port status)
Off
No link, or port was administratively shut down.
Green
Link present.
Blinking green
Activity. Port is sending or receiving data.
Alternating
green-amber
Link fault. Error frames can affect connectivity, and errors such as
excessive collisions, CRC errors, and alignment and jabber errors
are monitored for a link-fault indication.
Amber
Port is blocked by Spanning Tree Protocol (STP) and is not
forwarding data.
After a port is reconfigured, the port LED can remain amber for up
to 30 seconds as STP tests the switch for possible loops.
Blinking amber Port is blocked by STP and is sending or receiving packets.
