Port Modes And Leds - Cisco WS-C3550-12G Software Configuration Manual
Multilayer switch
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Front Panel View
Port Modes and LEDs
The port modes
you change port modes, the meanings of the port LED colors
The bandwidth utilization mode (UTL LED) does not appear on the front-panel images. Select
Note
Reports > Bandwidth Graphs to display the total bandwidth in use by the switch. Refer to the
switch hardware installation guide for information about using the UTL LED.
To select or change a mode, click the Mode button until the desired mode LED is green.
Table 3-3
Mode LED
STAT
DUPLX
SPEED
Table 3-4
Port LEDs
Port Mode
Port LED Color
STAT
Cyan (off)
Green
Amber
Brown
DUPLX
Cyan (off)
Green
SPEED
Cyan (off)
Green
Blinking green
Catalyst 3550 Multilayer Switch Software Configuration Guide
3-8
(Table
3-3) determine the type of information displayed through the port LEDs. When
Port Modes
Description
Link status of the ports. Default mode.
Duplex setting on the ports.
Speed setting on the ports.
Description
No link.
Link present.
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.
Port is not forwarding. Port was disabled by management, by an address violation,
or was blocked by Spanning Tree Protocol (STP).
After a port is reconfigured, the port LED can remain amber for up to
Note
30 seconds as STP checks the switch for possible loops.
No link and port is administratively shut down.
Port is operating in half-duplex mode.
Port is operating in full-duplex mode.
Port is operating at 10 Mbps or no link.
Port is operating at 100 Mbps (10/100 ports), 155 Mbps (ATM ports), or 1000 Mbps
(fixed Gigabit port).
Port is operating at 1000 Mbps (10/100/1000 ports).
Chapter 3
Getting Started with CMS
(Table
3-4) also change.
78-11194-03
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