Cisco WS-C2950T-48-SI Hardware Installation Manual page 37

Chapter 1 Overview
Table 1-5
Mode LED
STAT
UTIL
DUPLX
SPEED
1. A Catalyst 2950 LRE switch does not have a UTIL or a DUPLX LED.
When you change the port mode, the meanings of the port LED colors change.
to interpret these colors for the non-LRE switches.
LRE switches. The port LEDs are off when the MODE is set to SPEED.
Table 1-6
Port Mode
STAT (port status)
UTIL (utilization)
DUPLX
(half or full duplex)
OL-6156-01
Port Mode LEDs
Port Mode
Port status
1
Switch utilization
Port duplex mode
Port speed
Meaning of Port LED Colors in Different Modes for Non-LRE Switches
Color
Off
Solid green
Flashing green Activity. Port is sending or receiving data.
Alternating
green-amber
Solid amber
Green
Amber
Green and
amber
Off
Green
Description
The port status. This is the default mode.
The bandwidth in use by the switch.
The port duplex mode: half duplex or full duplex.
The port operating speed: 10 or 100 Mbps for 10/100 ports
and 10, 100, or 1000 Mbps for 10/100/1000 ports.
Table 1-7 explains how to interpret the colors for the
Meaning
No link.
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 not forwarding. Port was disabled by management, an
address violation, or Spanning Tree Protocol (STP).
After a port is reconfigured, the port LED can remain
Note
amber for up to 30 seconds while STP checks the switch
for possible loops.
The current backplane utilization that is displayed over the
amber LED background on a logarithmic scale.
The maximum backplane utilization since the switch was
powered on.
See Figure 1-20 to Figure 1-24
If the current utilization exceeds the maximum
Note
utilization, the maximum utilization is automatically
updated.
Port is operating in half duplex.
Port is operating in full duplex.
Catalyst 2950 Switch Hardware Installation Guide
Front-Panel Description
Table 1-6 explains how
for details.
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