Allied Telesis AT-S63 - Manual (Page 114)

Chapter 6: Port Parameters
114 Section I: Basic Operations
You might also want to disable a port that is not being used to secure it
from unauthorized connections.
Possible settings for this parameter are:
Enabled - The port receives and forwards packets. This is the default
setting.
Disabled - The port does not receive or forward packets.
Note
Option 2, HOL Blocking Prevention, is described in “Configuring
Head of Line Blocking” on page 117.
Option 3, Flow Control, is described in “Configuring Flow Control
and Back Pressure” on page 119.
Option 4, Filtering, is described in “Configuring Port Filtering” on
page 121.
Option 5, Rate Limiting, is described in “Setting Up Rate Limiting” on
page 123.
6 - Negotiation
You use this option to configure a port for Auto-Negotiation or to
manually set a port’s speed and duplex mode. The default is Auto.
Note
When you set negotiation to Manual, items 7 (Speed), 8 (Duplex),
and 9 (MDI Crossover) are displayed.
If you select Auto for Auto-Negotiation, which is the default setting, the
switch sets speed, duplex mode, and MDI crossover for the port
automatically. The switch determines the highest possible common
speed between the port and its end node and sets the port to that
speed. This helps to ensure that the port and the end node are
operating at the highest possible common speed.
Note the following items concerning the operation of Auto-Negotiation
on the 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 can
result in a mismatch if the end node is operating at a fixed duplex
mode of full-duplex.