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Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
OL-19593-01
Chapter 1 Product Overview
Front Panel Description
When you press the Mode button on any switch in the Catalyst 3750-X switch stack, all the stack
switches change to show the same selected mode. For example, if you press the Mode button on the stack
master to show the SPEED LED, all the other switches in the stack also show the SPEED LED.
Ta b l e 1-8 Port Mode LEDs
Mode LED Port Mode Description
STAT Port status The port status. This is the default mode.
SPEED Port speed The port operating speed: 10, 100, or 1000 Mb/s.
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.
MAST
1
1. Only Catalyst 3750-X switches.
Master The stack master status
STACK
1
Stack member status
StackWise port status
The stack member status.
The StackWise port status. See the “Stack LED (Catalyst
3750-X)” section on page 1-12.
PoE+
2
2. Only switches with PoE+ ports.
PoE+ port power The PoE+ port status.
Ta b 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, no activity.
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 be amber for up to 30
seconds as STP checks the switch for possible loops.
SPEED
10/100/1000 ports
Off Port is operating at 10 Mb/s.
Green Port is operating at 100 Mb/s.
Single green
flash (on for
100 ms, off for
1900 ms)
Port is operating at 1000 Mb/s.
Network module slots
Off Port is not operating.
Blinking green Port is operating at up to 10 Gb/s.