Allied-telesis AT-S62 Manual de usuario descargar pdf (Pagina 60)

Chapter 5: Port Parameters

Section I: Basic Operations 60

If you are configuring a twisted pair port and you select Auto-

Negotiation, which is the default setting, the port’s speed, duplex

mode, and MDI/MDI-X settings are set automatically.

You should note the following concerning the operation of Auto-

Negotiation on a twisted pair port:

❑ In order for a switch port to successfully Auto-Negotiate its duplex

mode with an end-node, the end-node should also be using Auto-

Negotiation. Otherwise, a duplex mode mismatch can occur. A

switch port using Auto-Negotiation will default to half-duplex if it

detects that the end-node is not using Auto-Negotiation. This will

result in a mismatch if the end-node is operating at a fixed duplex

mode of full-duplex.

To avoid this problem, when connecting an end-node with a fixed

duplex mode of full-duplex to a switch port, you should disable

Auto-Negotiation on the port and set the port’s speed and duplex

mode manually.

❑ If you disable Auto-Negotiation on a port, the auto-MDI/MDI-X

feature on a port is also disabled, and the port defaults to the MDI-

X configuration. Consequently, if you disable Auto-Negotiation

and set a port’s speed and duplex mode manually, you might also

need to set the port’s MDI/MDI-X setting as well.

Here are the possible settings for a twisted pair port:

❑ Auto: The port uses Auto-Negotiation to set both speed and

duplex mode. This is the default.

❑ 10Mbps - Half Duplex

❑ 10Mbps - Full Duplex

❑ 100Mbps - Half Duplex

❑ 100Mbps - Full Duplex

Note

Ports 49R and 50R on an AT-8550GB Series switch must be set to

Auto-Negotiation in order to operate at 1000Mbps. You cannot

manually configure these ports to 1000Mbps.

Here are the possible settings for a fiber optic port:

❑ Half Duplex

❑ Full Duplex: This is the default setting

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Allied-telesis AT-S62 Manual de usuario Pagina 60