ZyXEL Communications GS1510-16 -, User Manual

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GS1510 Series User’s Guide
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H A P T E R
9
Port Settings
This chapter describes how to view and configure the port settings on the Switch.
9.1 Port Settings
Use this screen to configure and view Switch port settings. Click Basic Settings >
Port Settings to display the following screen.
9.1.1 Auto Negotiation
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.
9.1.2 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.