Chapter 8 Basic Setting

The following table describes the labels in this screen.

Table 14 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 100/1000M for a 1000Base-T connection, and 10G for

 

a 10 Gigabit Ethernet connection.

 

 

Speed/

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

Duplex

port. The choices are Auto, and 100M/Full Duplex for a 100Base-T

 

connection. 1000M/Full Duplex is supported by both 1000Base-T and

 

1000Base-X connections. 10G/Full Duplex is supported by the 10 Gigabit

 

Ethernet 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.

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XGS4700-48F User’s Guide