User manual

Web Managed GbE Switch
33
 10M: Force speed with 10M ability.
 100M: Force speed with 100M ability.
 1000M: Force speed with 1000M ability.
Selecting 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.
Duplex
Port duplex capabilities:
 Auto: Auto duplex with all capabilities.
 Half: Auto speed with 10M ability only.
 Full: Auto speed with 100M ability only.
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 “Enabled” to enable it. Or select “Disabled” to disable it.
Apply
Click Apply to save your changes to the switch.
Flow Control
Config
The Config column displays if Flow Control has been configured to be
turned On or Off for the port.
Flow Control
Status
The column displays the port’s current Flow Control status.
3.3.2 Port Mirroring
The Mirror function copies all the packets that are transmitted by the source port to the destination
port. It allows administrators to analyze and monitor the traffic of the monitored ports.
The Mirror Configuration steps are as follows:
1. Choose “enable” or “disable” this function in “State” column
2. Select those ports that are going to be monitored by marking the check boxes in “Monitoring
Port” column.
3. Click the “TX” or “RX” or “Both” in the drop list of the “Sniffer Mode” column. Select the
packet types that are going to be monitored (transferred or received packets or both).
4. Click “Apply” to activate.