Chapter 16 Ethernet Port Configuration

The following table describes the fields in this screen.

Table 80 Ethernet Port Configuration: Port Setup

LABEL

DESCRIPTION

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.

 

 

Type

This field displays the port type and port speed.

 

 

Port Name

Enter a descriptive name for identification purposes.

 

 

Speed/

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

Duplex

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

 

and 1000M/Full Duplex (for Gigabit/mini-GBIC ports only).

 

Selecting Auto (auto-negotiation) makes one Ethernet port able to negotiate with a

 

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

 

support. When auto-negotiation is turned on, an Ethernet port on the switch negotiates

 

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

 

peer Ethernet 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, an Ethernet 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 Ethernet 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

The switch uses this priority value for incoming frames without an IEEE 802.1p priority

Priority

queue tag. The switch uses this priority value internally and does not add an IEEE

 

802.1p priority tag.

 

 

Intrusion Lock

Select the Intrusion Lock check box to enable this security feature on a selected port

 

on the switch. If an Ethernet cable is disconnected from the port, intrusion locking

 

prevents access once a cable is reconnected. This limits risk from unauthorized

 

access such as hacking.

 

Note: You cannot access a port with intrusion locking enabled after a

 

cable is disconnected and then reconnected. You must clear

 

and re-select the Intrusion Lock check box to allow access to

 

the port again.

 

 

BPDU

Configure the way to treat BPDUs received on this port. You must activate bridging

Control

control protocol transparency in the Switch Setup screen first.

 

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.

164

 

NetAtlas Workgroup User’s Guide