1-10
Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide
OL-9774-03
Chapter 1 Product Overview
Front Panel Description
Table 1-9 lists the LED colors in different modes and their meanings.
Tab l e 1-9 Meaning 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 checks the switch for possible loops.
Blinking amber Port is blocked by STP and is sending or receiving packets.
DUPLX
(duplex)
Off Port is operating in half duplex.
Green Port is operating in full duplex.
SPEED 10/100/1000 ports
Off Port is operating at 10 Mb/s.
Green Port is operating at 100 Mb/s.
Blinking green Port is operating at 1000 Mb/s.
10-Gigabit Ethernet module slots
Off Port is not operating.
Blinking green Port is operating at up to 10 Gbps.
STACK1
(stack member)
Off No stack member corresponding to that member number.
Blinking green Stack member number.
Green Member numbers of other stack member switches.