Industrial Ethernet Switch User Manual
3onedata proprietary and confidential
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Copyright © 3onedata Co., Ltd.
12
Network Diagnosis
12.1 Port mirroring
Port mirroring refers to copy data from the port which need to be monitored to
appointed monitoring port for analysis and monitoring. Ethernet switch supports
many-for-one mirror which means messages from several ports can be copied to a
monitored port. User can appoint the direction of monitored message, such as only
monitoring of transmitted messages of appointed port. The device configures port
mirroring function through port mirroring group. Each group includes a monitored port
and a group of mirror ports. Total bandwidth of mirroring is not more than that of
monitored port. It is good to monitor and manage its internal network data when using
port mirroring in a company. It is also good to locate the failure when network is cut
up.
Example as figure below: Port 4 collects all of the data from port 4 and port 5
