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Front Panel Description
Table 1-9
Port Mode
STAT
(port status)
SPEED
DUPLX
(duplex)
MAST
(data stack
master)
STACK
(stack member)
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
1-12
Meaning of Switch LED Colors in Different Modes
Port LED Color
Off
Green
Blinking green Activity. Port is sending or receiving data.
Alternating
green-amber
Amber
10/100/1000/SFP ports
Off
Green
Single green
flash (on for
100 ms, off for
1900 ms)
Network module slots
Off
Blinking green Port is operating at up to 10 Gb/s.
Off
Green
1
Off
Green
Amber
1
Off
Blinking green Stack member number.
Green
Meaning
No link, or port was administratively shut down.
Link present, no activity.
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 be amber for up to 30
seconds as STP checks the switch for possible loops.
Port is operating at 10 Mb/s.
Port is operating at 100 Mb/s.
Port is operating at 1000 Mb/s.
Port is not operating.
Port is operating in half duplex.
Port is operating in full duplex.
The switch is not the stack master.
Note
For a standalone switch, this LED is off.
The switch is the stack master.
Error during stack master election.
No stack member corresponding to that member number.
Member numbers of other stack member switches.
Chapter 1
Product Overview
OL-19593-02
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