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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
78-6511-05
Chapter 2 Getting Started with CMS
Cluster Manager and VSM
Table 2-6, Table 2-7, and Table 2-8 explain how to interpret the port LED colors
after you change the port mode.
On the modular switches, the 1 or 2 LED is green when a module is installed.
Refer to the module documentation for complete information.
Table 2-6 Port LEDs on the Catalyst 2912, 2924C, 2924, 2912MF, and 2924M XL Switches
Port Mode Port LED Color Description
STAT Cyan (off) No link.
Green Link present.
Blinking green Activity on the port. Port is transmitting or receiving data.
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.
Port is not forwarding. Port was disabled by management, or by an
address violation, or was blocked by Spanning Tree Protocol (STP).
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.
Brown No link and port is administratively shut down.
FDUP Cyan (off) Port is operating in half-duplex mode.
Green Port is operating in full-duplex mode.
SPD Cyan (off) Port is operating at 10 Mbps.
Green Port is operating at 100 Mbps.
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