LevelOne ProCon GSW-1290, User Manual

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LevelOne GSW-1290 Gigabit Layer2 SNMP Switch
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.
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. Follow the steps below to set up port mirroring.
Figure 4- 2. Setup Port Mirroring menu
To configure a mirror port:
Select the Source Unit containing the port that is being mirrored.
Configure how the port is to be mirrored by selecting the direction that will be mirrored. Choose Ingress,
Egress, or Both
for the mirrored port by clicking the appropriate radio button for the port.
Select the Target Port using the Unit and Port drop-down menus.
Change the
Status drop-down menu to Enabled .
Click Apply to let the changes take effect.
NOTE: You cannot mirror a fast port onto a slower port. For example, if you try
to mirror the traffic from a 100 Mbps port onto a 10 Mbps port, this can cause
throughput problems. The port you are copying frames from should always
support an equal or lower speed than the port to which you are sending the copies.
Also, the target port for the mirroring cannot be a member of a trunk group.
Please note a target port and a source port cannot be the same port.
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