Installation guide

2-11
Catalyst 3750 Switch Hardware Installation Guide
78-15136-02
Chapter 2 Product Overview
Front Panel Description
Table 2-4 Port Mode LEDs
Mode LED Port Mode Description
STAT Port status The port status. This is the default mode.
DUPLX Port duplex mode The port duplex mode: full duplex or half duplex.
Note The 10/100/1000 ports operate only in full-duplex
mode.
SPEED Port speed The port operating speed: 10, 100, or 1000 Mbps.
STACK Stack Member Status
StackWise Port Status
The stack member status.
The StackWise port status. See the “Stack LED” section on
page 2-12 for more information.
Table 2-5 Meaning of LED Colors in Different Modes on the Switch
Port Mode LED Color Meaning
STAT
(port status)
Off No link, or port was administratively shut down.
Green Link present.
Flashing green Activity. Port is transmitting 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.
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 transmitting or receiving packets.
DUPLX
(duplex)
Off Port is operating in half duplex.
Green Port is operating in full duplex.