ZyXEL GS-1548 User Guide - Page 51
Port Configuration, continued, LABEL, DESCRIPTION
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Chapter 6 Port Settings Table 9 Port Configuration (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 backpressure 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. Default Priority PVID Apply 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 Enable to turn this feature on or select Disable to turn it off. This priority value is added to incoming frames without a priority queue tag. Enter a number identifying an existing VLAN. The Switch tags the incoming untagged frames on that port so that the frames are forwarded to the VLAN group that the tag defines. Click Apply to save your changes. GS-1524/GS-1548 User's Guide 51