Cisco Catalyst 3560 Hardware Installation Manual page 55

Chapter 2 Product Overview
Table 2-5 Meaning of Port LED Colors in Different Modes on the Switch
Port Mode LED Color
PoE Off
Green
Alternating
green and
amber
Blinking amber PoE is off due to a fault.
Amber
STAT Off
(port status)
Green
Blinking green Activity. Port is transmitting or receiving data.
Alternating
green-amber
Amber
Blinking amber Port is blocked by STP and is not transmitting or receiving
DUPLX Off
(duplex)
Green
78-16057-01
Meaning
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.
PoE is on. The port LED is green only when the switch port is
providing power.
PoE is denied because providing power to the powered device will
exceed the 370 W switch power capacity.
PoE for the port has been disabled.
PoE is enabled by default.
Note
No link, or port was administratively shut down.
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 blocked by Spanning Tree Protocol (STP) and is not
forwarding data.
After a port is reconfigured, the port LED can remain
Note
amber for up to 30 seconds as STP checks the network
topology for possible loops.
packets.
Port is operating in half duplex.
Port is operating in full duplex.
Catalyst 3560 Switch Hardware Installation Guide
Front Panel Description
2-11