HP 100BaseT Guide de l'utilisateur télécharger pdf (Page 110)

HP 100Base-T Hubs Installation and Reference Guide

5-6 Hardware Reference

Utilization %

Color: Green and yellow

Function: Indicates the percentage of network bandwidth

currently utilized

Label (%) Color Function

 *UHHQ ,QGLFDWHVSHUFHQWDJHRI/$1EDQGZLGWKLQXVHE\YDOLG

 <HOORZ GDWD

Table 5.8 Utilization Indicators

There are five LEDs representing the percentage of network

bandwidth in use by the attached stack (or isolated hub). When

active, these LEDs look like a stereo’s equalizer display. The

hub updates this display every 0.5 seconds.

For example, if network utilization reaches 1%, the LED

labeled 1 will light. However, if network utilization rises above

1% (e.g., 30%), the LED labeled 30 and all the other LEDs

before it (i.e., 1, 5, and 15) will light in rapid succession.

These LEDs monitor the share of valid network frames

transmitted by the stack (or this hub, if isolated) within a

100Mbit/s bandwidth. They provide a quick way to monitor the

current traffic load relative to the capacity available to the

attached collision domain.

Collision %

Color: Green and yellow

Label (%) Color Function

 *UHHQ 6KRZVSHUFHQWDJHRISDFNHWFROOLVLRQVRFFXUULQJ

 <HOORZ RXWRIWKHWRWDOSDFNHWVUHFHLYHGE\WKHKXE

Table 5.9 Collision Indicators

Collisions occur when two or more devices connected to a hub

attempt to transmit data simultaneously on the network. When

a collision occurs, devices pause and then re-transmit after a

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 156 157

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HP 100BaseT Guide de l'utilisateur Page 110