Allied Telesis AT-S63 - Manual (Page 104)

Chapter 6: Port Parameters
104 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
The procedures for implementing item 2, HOL Blocking Prevention,
are described in “Configuring Head of Line Blocking” on page 107.
The procedures for item 3, Flow Control, are described in
“Configuring Head of Line Blocking” on page 107.
To set up item 4, Filtering, go to “Configuring Filtering” on page 112.
Item 5, Rate Limiting, is described in “Setting Up Rate Limiting” on
page 114.
6 - Negotiation
You use this option to configure a port for autonegotiation 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 autonegotiation, 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 autonegotiation
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
autonegotiation. Otherwise, a duplex mode mismatch can occur. A
switch port using autonegotiation defaults to half-duplex if it
detects that the end node is not using autonegotiation. This results
in a mismatch if the end node is operating at a fixed duplex mode
of full-duplex.
ˆ To avoid this problem, when you connect an end node with a fixed
duplex mode of full-duplex to a switch port, you should disable