Cisco Catalyst 3750 Hardware Installation Manual page 68

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