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Dimension ES-3124 Ethernet Switch
6-12 Basic Setting
Table 6-5 Port Setup
LABEL DESCRIPTION
Port This is the port index number.
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 Enter a descriptive name that identifies this port.
Type This field displays 10/100M for an Ethernet/Fast Ethernet connection and 100/1000M for Gigabit
connections.
Speed/Duplex Select the speed and the duplex mode of the Ethernet connection on this port. Choices are Auto,
10M/Half Duplex, 10M/Full Duplex, 100M/Half Duplex, 100M/Full Duplex and 1000M/Full
Duplex (for Gigabit 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 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 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 6-3 for more information. See also Priority Queue Assignment in
Switch Setup and Queuing Method for related information.
Apply Click Apply to save your changes back to the switch.
Cancel Click Cancel to begin configuring this screen afresh.