DES-3550 Layer 2 Fast Ethernet Switch User’s Guide
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To configure switch ports:
1. Choose the port or sequential range of ports using the From…To… port pull-down
menus.
2. Use the remaining pull-down menus to configure the parameters described below:
Parameter Description
State <Enabled> Toggle the State <Enabled> field to either enable or disable a given port or
group of ports.
Speed/Duplex
<Auto>
Toggle the Speed/Duplex <Auto> field to either select the speed and
duplex/half-duplex state of the port. Auto – auto-negotiation between 10 and
1000 Mbps devices, full- or half-duplex. The Auto setting allows the port to
automatically determine the fastest settings the device the port is connected
to can handle, and then to use those settings. The other options are Auto,
10M/Half, 10M/Full, 100M/Half, and 100M/Full. There is no automatic
adjustment of port settings with any option other than Auto.
Flow Control
Displays the flow control scheme used for the various port configurations.
Ports configured for full-duplex use 802.3x flow control, half-duplex ports use
backpressure flow control, and Auto ports use an automatic selection of the
two. The default is Disabled.
Learn Enable or disable MAC address learning for the selected ports. When
Enabled, destination and source MAC addresses are automatically listed in
the forwarding table. When learning is Disabled, MAC addresses must be
manually entered into the forwarding table. This is sometimes done for
reasons of security or efficiency. See the section on Forwarding/Filtering for
information on entering MAC addresses into the forwarding table. The default
setting is Disabled.
Click Apply to implement the new settings on the Switch.
Port Mirroring
The Switch allows you to copy frames transmitted and received on a port and redirect the
copies to another port. You can attach a monitoring device to the mirrored port, such as a
sniffer or an RMON probe, to view details about the packets passing through the first port.
This is useful for network monitoring and troubleshooting purposes. To view the
Port
Mirroring window, click Port Mirroring in the Configuration folder.
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