Allied Telesis AT-MC105XL Guía de instalación descargar pdf (Pagina 15)

AT-MC105XL and AT-MC106XL Installation Guide

The value to this type of network monitoring and fault notification is that

some hubs and switches can be configured to take a specific action in the event

of the loss of connection on a port. In some cases, the unit can be configured to

seek a redundant path to a disconnected end-node or send out a trap to a

network management station, and so alert the network administrator of the

problem.

Note

The MissingLink feature is disabled when you perform a link test with

the NML/LNK TST button. Consequently, to ensure that the

MissingLink feature is activated on the media converter, always set the

button to the NML (IN) position during normal network operations.

Link Test. A link test is a fast and easy way for you to test the connections

between the ports on the media converter and the end-nodes that are

connected to the ports. If a network problem occurs, you can perform a link

test to determine which port is experiencing a problem, and so be able to focus

on the cable and end-node where the problem resides.

A link test is performed when the NML/LNK TST button is in the LNK TST

(OUT) position.

Note

Performing a link test does not interfere with a media converter’s ability

to pass network traffic.

Auto-negotiation

Auto-negotiation determines the duplex mode of the ports. The duplex mode

refers to the manner in which an end-node sends and receives data on the

network. An end-node can operate in either half- or full-duplex mode,

depending on its capabilities. An end-node operating in half-duplex can either

send or receive data, but not both at the same time, while an end-node

operating in full-duplex can send and receive data simultaneously. Best

network performance is achieved when an end-node can operate in full-duplex

mode.

The AT-MC105XL and AT-MC106XL media converters can operate in either

full- or half-duplex mode. However, the end-nodes connected to these media

converters must operate in the same duplex mode to avoid a duplex mode

mismatch, which can result in poor network performance. Figure 3 shows an

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Allied Telesis AT-MC105XL Guía de instalación Pagina 15