ZyXEL Communications XGS1250-12 User Manual page 44

Table 11 Port (continued)
LABEL DESCRIPTION
Flow Control A concentration of traffic on a port decreases port bandwidth and overflows buffer memory
causing packet discards and frame losses. Flow Control is used to regulate transmission of
signals to match the bandwidth of the receiving port.
The Switch uses IEEE802.3x flow control in full duplex mode and back pressure flow control in
half duplex mode.
IEEE802.3x flow control is used in full duplex mode to send a pause signal to the sending port,
causing it to temporarily stop sending signals when the receiving port memory buffers fill.
Back pressure flow control is typically used in half duplex mode to send a "collision" signal to
the sending port (mimicking a state of packet collision) causing the sending port to temporarily
stop sending signals and resend later. Select the check box to enable it.
Apply Click this button to save your changes to the Switch.
Chapter 8 Port
XGS1210-12 / XGS1250-12 User's Guide
44