ZyXEL Communications GS-1524 User Manual

Chapter 6 Port Settings

GS-1524/GS-1548 User’s Guide

Use this screen to configure individual port settings.Click a port number in the Port Status 
screen to access this screen. 

Figure 30   Port Configuration 

The following table describes the labels in this screen.  

Table 9   Port Configuration   

Port

This is the port index number. 

Admin

Select Enable to activate the port or Disable to deactivate the port.

Auto Negotiate Select Enable and the port will negotiate the speed, duplex mode and flow control 

settings with the peer port. If the peer port does not support auto-negotiation or turns 

off this feature, the Switch determines the connection speed by detecting the signal 

on the cable and using half duplex mode. 
Select Disable to configure the port settings manually. When the Switch’s auto-

negotiation is turned off, a port uses the pre-configured speed and duplex mode when 

making a connection, thus requiring you to make sure that the settings of the peer 

port are the same in order to connect.

Speed Duplex

Select the speed and the duplex mode of the Ethernet connection on this port. 

Choices are 10Mbps Half, 10Mbps Full, 100Mbps Half, 100Mbps Full and 1Gbps 

Full.  

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. 
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.

Default Priority This priority value is added to incoming frames without a priority queue tag. 

PVID

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. 

Apply

Click Apply to save your changes.