Cisco ME-C3750-24TE-M Hardware Installation Manual page 51

Chapter 2 Product Overview
Table 2-4 Port Mode LEDs
Mode LED Port Mode
STAT Port status
DUPLX Port duplex mode
SPEED Port speed
STACK Stack Member Status
StackWise Port Status
Table 2-5 Meaning of LED Colors in Different Modes on the Switch
Port Mode LED Color
STAT Off
(port status)
Green
Flashing green Activity. Port is transmitting or receiving data.
Alternating
green-amber
Amber
Flashing amber Port is blocked by STP and is transmitting or receiving packets.
DUPLX Off
(duplex)
Green
78-15136-02
Description
The port status. This is the default mode.
The port duplex mode: full duplex or half duplex.
The 10/100/1000 ports operate only in full-duplex
Note
mode.
The port operating speed: 10, 100, or 1000 Mbps.
The stack member status.
The StackWise port status. See the
page 2-12 for more information.
Meaning
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 amber
Note
for up to 30 seconds as STP checks the switch for possible
loops.
Port is operating in half duplex.
Port is operating in full duplex.
Catalyst 3750 Switch Hardware Installation Guide
Front Panel Description
"Stack LED" section on
2-11