Cisco 2950 Hardware Installation Guide - Page 37

Mode LED, Port Mode, Description, Color, Meaning, Table 1-5, Port Mode LEDs

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Chapter 1 Overview Front-Panel Description Table 1-5 Port Mode LEDs Mode LED Port Mode Description STAT UTIL1 Port status Switch utilization The port status. This is the default mode. The bandwidth in use by the switch. DUPLX Port duplex mode The port duplex mode: half duplex or full duplex. SPEED Port speed The port operating speed: 10 or 100 Mbps for 10/100 ports and 10, 100, or 1000 Mbps for 10/100/1000 ports. 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. Table 1-6 explains how to interpret these colors for the non-LRE switches. Table 1-7 explains how to interpret the colors for the LRE switches. The port LEDs are off when the MODE is set to SPEED. Table 1-6 Meaning of Port LED Colors in Different Modes for Non-LRE Switches Port Mode Color Meaning STAT (port status) Off No link. Solid green Link present. Flashing green Activity. Port is sending or receiving data. Alternating green-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. Solid amber Port is not forwarding. Port was disabled by management, an address violation, or Spanning Tree Protocol (STP). Note After a port is reconfigured, the port LED can remain amber for up to 30 seconds while STP checks the switch for possible loops. UTIL (utilization) 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 amber See Figure 1-20 to Figure 1-24 for details. Note If the current utilization exceeds the maximum utilization, the maximum utilization is automatically updated. DUPLX Off Port is operating in half duplex. (half or full duplex) Green Port is operating in full duplex. OL-6156-01 Catalyst 2950 Switch Hardware Installation Guide 1-17

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1-17
Catalyst 2950 Switch Hardware Installation Guide
OL-6156-01
Chapter 1
Overview
Front-Panel Description
When you change the port mode, the meanings of the port LED colors change.
Table 1-6
explains how
to interpret these colors for the non-LRE switches.
Table 1-7
explains how to interpret the colors for the
LRE switches. The port LEDs are off when the MODE is set to SPEED.
Table 1-5
Port Mode LEDs
Mode LED
Port Mode
Description
STAT
Port status
The port status. This is the default mode.
UTIL
1
1.
A Catalyst 2950 LRE switch does not have a UTIL or a DUPLX LED.
Switch utilization
The bandwidth in use by the switch.
DUPLX
Port duplex mode
The port duplex mode: half duplex or full duplex.
SPEED
Port speed
The port operating speed: 10 or 100 Mbps for 10/100 ports
and 10, 100, or 1000 Mbps for 10/100/1000 ports.
Table 1-6
Meaning of Port LED Colors in Different Modes for Non-LRE Switches
Port Mode
Color
Meaning
STAT (port status)
Off
No link.
Solid green
Link present.
Flashing green
Activity. Port is sending or receiving data.
Alternating
green-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.
Solid amber
Port is not forwarding. Port was disabled by management, an
address violation, or Spanning Tree Protocol (STP).
Note
After a port is reconfigured, the port LED can remain
amber for up to 30 seconds while STP checks the switch
for possible loops.
UTIL (utilization)
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
amber
See
Figure 1-20
to
Figure 1-24
for details.
Note
If the current utilization exceeds the maximum
utilization, the maximum utilization is automatically
updated.
DUPLX
(half or full duplex)
Off
Port is operating in half duplex.
Green
Port is operating in full duplex.