Cisco WS-C2950-24 Hardware Installation Manual page 37

Chapter 1 Overview
Table 1-6 Meaning of Port LED Colors in Different Modes
Port Mode
STAT (port status)
UTIL (utilization)
DUPLX
(half or full duplex) Green
78-11157-02
When you change the port mode, the meanings of the port LED colors change.
Table 1-6 explains how to interpret these colors.
Color Meaning
Off No link.
Solid green Link present.
Flashing green Activity. Port is transmitting or receiving data.
Alternating Link fault. Error frames can affect connectivity, and errors such
green-amber as excessive collisions, CRC errors, and alignment and jabber
errors are monitored for a link-fault indication.
Solid amber Port is not forwarding. Port was disabled by management, an
address violation, or Spanning Tree Protocol (STP).
Note
Green The current backplane utilization that is displayed over the
amber LED background on a logarithmic scale.
Amber The maximum backplane utilization since the switch was
powered on.
Green and See Figure 1-15
amber
Note
Off Port is operating in half duplex.
Port is operating in full duplex.
After a port is reconfigured, the port LED can
remain amber for up to 30 seconds while STP
checks the switch for possible loops.
to Figure 1-18
If the current utilization exceeds the maximum
utilization, the maximum utilization is
automatically updated.
Catalyst 2950 Desktop Switch Hardware Installation Guide
Front-Panel Description
for details.
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