Chapter 2 Product Overview
Front Panel Description
2-20
Catalyst 3750 Switch Hardware Installation Guide
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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.
SPEED
10/100 and 10/100/1000 ports
Off Port is operating at 10 Mbps.
Green Port is operating at 100 Mbps.
Flashing green Port is operating at 1000 Mbps.
SFP ports
Off Port is operating at 10 Mbps.
Green Port is operating at 100 Mbps.
Flashing green Port is operating at 1000 Mbps.
Note When installed in Catalyst 3750 switches, 1000BASE-T
SFP modules can operate at 10, 100, or 1000 Mbps in
full-duplex mode or in half-duplex mode at 10 or 100 Mbps.
XENPAK port
Off Port is not operating.
Flashing Green Port is operating at up to 10 Gbps.
Table 2-6 Meaning of LED Colors in Different Modes on the Switch (continued)
Port Mode Port LED Color Meaning
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