Cisco Systems WSC3750X24TS specifications Port Mode, Port LED Color, Meaning, 1-19

Chapter 1 Product Overview

10/100 and 10/100/1000 Ports

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 1-6explains how to interpret the port LED colors in different port modes.

Table 1-6	Meaning of LED Colors in Different Modes on the Switch
Port Mode		Port LED Color	Meaning
PoE1		Off		PoE is off. If the powered device is receiving power from an AC
				power source, the port LED is off even if the powered device is
				connected to the switch port.
		Green		PoE is on. The port LED is green only when the switch port is
				providing power.
		Alternating		PoE is denied because providing power to the powered device will
		green and		exceed the 370 W switch power capacity.
		amber
		Blinking amber	PoE is off due to a fault.
				Caution PoE faults are caused when noncompliant cabling or
						powered devices are connected to a PoE port. Only
						standard-compliant cabling can be used to connect Cisco
						pre-standard IP Phones and wireless access points or
						IEEE 802.3af-compliant devices to PoE ports. A cable or
						device that causes a PoE fault must be removed from the
						network.
		Amber		PoE for the port has been disabled.
				Note PoE is enabled by default.
STAT		Off		No link, or port was administratively shut down.
(port status)
		Green		Link present.
		Flashing green		Activity. Port is sending or receiving data.
		Alternating		Link fault. Error frames can affect connectivity, and errors such as
		green-amber		excessive collisions, cyclic redundancy check (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.
				Note After a port is reconfigured, the port LED can remain amber
					for up to 30 seconds as STP checks the switch for possible
					loops.
		Flashing amber	Port is blocked by STP and is sending and receiving packets.
DUPLX		Off		Port is operating in half duplex.
(duplex)
		Green	Port is operating in full duplex.

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-07 1-19