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.

 

 

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 to the switch.

 

 

 

 

57

ES-1552 User’s Guide