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Table 12 basic setting > port setup – ZyXEL Communications ZyXEL Dimension GS-2024 User Manual

Page 73

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Chapter 7 Basic Setting

GS-2024 User’s Guide

73

The following table describes the labels in this screen.

Table 12 Basic Setting > Port Setup

LABEL

DESCRIPTION

Port

This is the port index number.

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this

row first to set the common settings and then make adjustments on a port-by-port

basis.

Note: Changes in this row are copied to all the ports as soon as you

make them.

Active

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.

Name

Type a descriptive name that identifies this port. You can enter up to 64 alpha-

numerical characters.

Note: Due to space limitations, the port name may be truncated in

some web configurator screens.

Type

This field displays 10/100/1000M for a 1000Base-T connection.

Speed/Duplex

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

choices are Auto, 10M/Half Duplex, 10M/Full Duplex, 100M/Half Duplex and

100M/Full Duplex for a 1000Base-T connection. 1000M/Full Duplex is supported by

both 1000Base-T and 1000Base-X connections.
Selecting Auto (auto-negotiation) allows one port to negotiate with a peer port

automatically to obtain the connection speed and duplex mode that both ends

support. When auto-negotiation is turned on, a port on the Switch negotiates with the

peer automatically to determine the connection speed and duplex mode. 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. 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.

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 Flow Control to

enable it.

802.1p Priority This priority value is added to incoming frames without a (802.1p) priority queue tag.

See Priority Queue Assignment in

Table 10 on page 68

for more information.

Jumbo Frame

Jumbo frames are Ethernet frames with a payload greater than 1500 bytes. Select

this if you want this port to accept jumbo frames. Clear this if you want this port to

discard jumbo frames.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch loses

these changes if it is turned off or loses power, so use the Save link on the top

navigation panel to save your changes to the non-volatile memory when you are done

configuring.

Cancel

Click Cancel to begin configuring this screen afresh.