User manual
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6.10 Diagnosis
6.10.1 Mirror
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: Port 3 collects all of the data from port 1 and port 2
（
Figure 6.10.1
）
Mirror Port
It defines a group of ports which are needed to be monitored. The device collects data from these
ports.
Monitored Port
It defines a group of ports which are used to monitor other ports. The device outputs the data through
these ports.
Watch direction
