Allied Telesis AT-S62 - Manual (Page 103)

AT-S62 Menus Interface User’s Guide
Section I: Basic Operations 103
The default setting for flow control on a switch port is disabled.
Selecting this option displays the Flow Control menu, shown in
Figure 24.
Figure 24 Flow Control Menu
The options in the Flow Control menu are described below:
1 - Flow Control
Disabled - No flow control on the port. This is the default setting.
Enabled - Flow control is activated. This setting is appropriate only
when the end node connected to the port is also using flow
control.
Auto - The port uses flow control only if it detects that the end
node is using it.
2 - Flow Control (Cell Limit)
Specifies the number of cells. A cell represents 64 bytes. The range
is 1 to 57,344 cells. The default is 57,344.
B -Back Pressure
Sets backpressure on a port. This option only applies for ports
operating in half-duplex mode.
Backpressure performs much the same function as flow control.
Both are used by a port to control the flow of ingress packets from
the end node.
Where they differ is that while flow control applies to ports
operating in full-duplex, backpressure applies to ports operating
in half-duplex mode.
When a twisted pair port on the switch operating in half-duplex
mode needs to stop an end node from transmitting data, it forces
a collision. A collision on an Ethernet network occurs when two
end nodes attempt to transmit data using the same data link at
the same time. A collision causes the end nodes to stop sending
data. This is called backpressure.
Allied Telesyn Ethernet Switch AT-8524M - AT-S62
Production Switch
User: Manager 11:20:02 02-Jan-2004
Flow Control
Configuring Port 11
1 - Flow Control ................. Disabled
2 - Flow Control (Cell Limit) .... 57344
R - Return to Previous Menu
Enter your selection?