ZyXEL NetAtlas User Guide - Page 170
Queuing Method
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Chapter 14 Switch Configuration The following table describes the fields in this screen. Table 80 Switch Configuration > Port Setup LABEL DESCRIPTION Port List Select a port that you want to configure in this screen. Enable Port Select this check box to enable a port. The factory default for all ports is enabled. A port must be enabled for data transmission to occur. Enable 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 IEEE 802.3x flow control in full duplex mode and backpressure flow control in half duplex mode. IEEE 802.3x 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 this check box to enable it. Port Name 802.1p Priority BPDU Control This field is not available for a PON port. Enter a descriptive name (up to 64 ASCII characters) for identification purposes. The switch uses this priority value for incoming frames without an IEEE 802.1p priority queue tag. The switch uses this priority value internally and does not add an IEEE 802.1p priority tag. Configure the way to treat BPDUs received on this port. Select peer to process any BPDU (Bridge Protocol Data Units) received on this port. Select tunnel to forward BPDUs received on this port. Select discard to drop any BPDU received on this port. Select network to process a BPDU with no VLAN tag and forward a tagged BPDU. Apply Copy to... Close This field is not available for a PON port. Click Apply to save your changes. Click the Copy to.. button to copy the configuration from the device that you are currently configuring to the port(s) on the same device or the port(s) on other device(s) of the same model. Click Close to exit this screen. 14.2 Queuing Method Queuing is used to help solve performance degradation when there is network congestion. 170 NetAtlas EPON Manager User's Guide