ZyXEL Communications XS1920 Series User Manual page 70

The following table describes the labels in this screen.
Table 17 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 Enter a descriptive name that identifies this port. You can enter up to 64 alpha-numerical
characters.
Note: Due to space limitation, the port name may be truncated in some web configurator
screens.
Type This field displays the capacity that the port can support.
Speed/Duplex Select the speed and the duplex mode of the Ethernet connection on this port. Choices are
100M/Full Duplex , 1000M/Full Duplex, 10G/Full Duplex, Auto-1000M / Full-
Duplex, Auto-10G / Full Duplex.
Auto-1000M / Full-Duplex supports Ethernet and fiber connections at 100Mbps or
1000Mbps (1Gbps) full-duplex mode. Auto-10G / Full-Duplex supports Ethernet
connections at 100Mbps, 1000Mbps or 10Gbps full-duplex mode and 10Gbps (only) for fiber
connections.
Selecting Auto-1000M or Auto-10G (auto-negotiation) allows one port to negotiate with a
peer port automatically to obtain the connection speed 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 . 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
cablee. 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 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 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 This priority value is added to incoming frames without a (802.1p) priority queue tag. See
Priority Priority Queue Assignment in
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.
Chapter 8 Basic Setting
Table 12 on page 63
XS1920 Series User's Guide
70
for more information.