Trunks 43
6.2.1 Speed/Duplex
The Speed and Duplex settings for the trunk are set by a single drop-down list. The possible
values are:
• Auto - Speed and duplex settings are auto-negotiated.
• 10HDX - 10 Mbps, half-duplex
• 10FDX - 10 Mbps, full-duplex
• 100HDX - 100 Mbps, half-duplex
• 100FDX - 100 Mbps, full-duplex
• 1000FDX - 1000 Mbps, full-duplex
Note: Auto is the default setting and need not be changed unless you are experiencing
problems establishing link with a connected device (i.e. the front-panel LEDs or SYSTEM >
Information page indicate that the link is down when there is a cable connecting a device to
the switch).
Note: In full-duplex mode, both ends of a connection can send traffic at the same time which
effectively doubles the available throughput. In half-duplex mode, only one end of the
connection can send traffic at any one time.
6.2.2 Flow Control
When Flow Control is selected on a port (by clicking on the tick-box in the Flow Control
column), the switch will attempt to slow incoming traffic down when traffic levels are high. It
does this by sending special Pause packets on full-duplex connections or creating back-pressure
(deliberately causing collisions) on half-duplex connections. This can increase traffic throughput
by reducing the number of dropped packets and, as a result, the number of resends that are
required. However it is not appropriate in all circumstances.
To Next Page
Loading...
