Allied Telesis AT-S63 - Manual (Page 80)

Chapter 5: Port Parameters
80 Section I: Basic Operations
Enabled - The port receives and forwards packets. This is the default
setting.
Disabled - The port does not receive or forward packets.
Speed and Duplex
You use this selection to configure a port for Auto-Negotiation or to
manually set a port’s speed and duplex mode.
If you select Auto-Negotiate for Auto-Negotiation, which is the default
setting, the switch sets both speed and duplex mode for the port
automatically.
Note the following about the operation of Auto-Negotiation on a switch
port:
ˆ In order for a switch port to successfully autonegotiate 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 defaults to half-duplex if it
detects that the end node is not using Auto-Negotiation. This
results 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.
ˆ If you disable Auto-Negotiation on a twisted pair port, the auto-
MDI/MDI-X feature on a port is also disabled, and the port defaults
to the MDI-X configuration. 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.
Auto-Negotiate: The port autonegotiates both speed and duplex mode.
This is the default.
To manually set the speed and duplex mode of a port, select one of the
following:
10Mbps - Half Duplex
10Mbps - Full Duplex
100Mbps - Half Duplex
100Mbps - Full Duplex
1Gb - Full Duplex (Applicable only to 1000Base SFP and GBIC
modules.)