Cisco CATALYST 2960 Hardware Installation Manual page 27

Chapter 1 Product Overview
Even if the PoE mode is not selected, the PoE LED shows PoE problems when they are detected
(Table
Table 1-5
Color
Off
Green
Blinking amber
To select or change a mode, press the Mode button until the desired mode is highlighted. When you
change port modes, the meanings of the port LED colors also change.
the port LED colors in different port modes.
Table 1-6 Meaning of Port LED Colors in Different Modes on the Switch
Port Mode LED Color
STAT Off
(port status)
Green
Blinking green
Alternating
green-amber
Amber
Blinking amber
DUPLX Off
(duplex)
Green
10/100 and 10/100/1000 ports
SPEED
Off
Green
Blinking green
SFP ports
Off
Green
Blinking green
OL-7075-09
1-5). The PoE LED applies only to Catalyst 2960 switches that support PoE.
PoE Mode LED
PoE Status
PoE mode is not selected. None of the 10/100 PoE ports have been denied power
or are in a fault condition.
PoE mode is selected, and the PoE status is shown on the port LEDs.
PoE mode is not selected. At least one of the 10/100 PoE ports has been denied
power, or at least one of the ports has a PoE fault.
Meaning
No link, or port was administratively shut down.
Link present.
Activity. Port is sending or receiving data.
Link fault. Error frames can affect connectivity, and errors such as excessive collisions,
cyclic redundancy check (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 for up to 30 seconds as
Note
STP checks the network topology for possible loops.
Port is blocked by STP and is not sending or receiving packets.
Port is operating in half duplex.
Port is operating in full duplex.
Port is operating at 10 Mb/s.
Port is operating at 100 Mb/s.
Port is operating at 1000 Mb/s.
Port is operating at 10 Mb/s.
Port is operating at 100 Mb/s.
Port is operating at 1000 Mb/s.
When installed in Catalyst 2960 switches, 1000BASE-T SFP modules can operate at
Note
10, 100, or 1000 Mb/s in full-duplex mode or at 10 or 100 Mb/s in half-duplex mode.
Table 1-6
Catalyst 2960 Switch Hardware Installation Guide
Front Panel Description
explains how to interpret
1-17