Allied Telesis AT-S79, User Manual, Page: 56 / 210

Chapter 4: Port Configuration
56 Section I: Using the Menus Interface
Changing the Flow Control Setting
Flow control applies to ports operating in full-duplex mode. A switch port
uses flow control to control the flow of ingress packets from its end node.
A port using flow control issues a special frame, referred to as a PAUSE
frame, as specified in the IEEE 802.3x standard, to stop the transmission
of data from an end node. When a port needs to stop an end node from
transmitting data, it issues this frame. The frame instructs the end node to
cease transmission. The port continues to issue PAUSE frames until it is
ready again to receive data from the end node.
To change the flow control setting on a port, perform the following
procedure:
1. From the Main Menu, type B to select Basic Configuration .
The Basic Switch Configuration Menu is shown in Figure 4 on page 30
2. From the Basic Switch Configuration Menu, type P to select Port
Configuration .
The Port Configuration Menu is shown in Figure 13 on page 50.
3. Type S to select Set Status .
The following prompt is displayed:
Set Flow Control -> Enter port number >
4. Enter the port number whose flow control setting you want to change.
You can configure only one port at a time.
The following prompt is displayed:
Enable or Disable flow control for port <n> (E/D)>
5. Type E to enable flow control or D to disable it. The default is enabled.
The display is refreshed to show the port’s new flow control setting.
6. Type Q to select Quit to previous menu and save your changes.