Port Mirroring - Hirschmann RS20 Reference Manual

Diagnostics

7.5 Port Mirroring

7.5 Port Mirroring
The MACH4002 24/48 + 4G and the Power MICE support up to 8 ports.
The port mirroring function enables you to review the data traffic from a group
of ports on the device for diagnostic purposes (N:1). The device forwards
(mirrors) the data for these ports to another port. This process is port
mirroring.
The ports from which the device copies the traffic are source ports. The port
on which you review the data is the destination port. You use physical ports
as source or destination ports.
In port mirroring, the device copies valid data packets of the source port to
the destination port. The device does not affect the data traffic on the source
ports during port mirroring.
A management tool connected at the destination port, e.g. an RMON probe,
can thus monitor the data traffic of the source ports in the sending and
receiving directions.
Selecting "RX" as the monitoring direction on a source port determines the
destination port mirror (copy from the selected source interface) only frames
received on the source interface (monitoring ingress).
Selecting "TX" as the monitoring direction on a source port determines the
destination port mirror (copy from the selected source interface) only frames
sent from the source interface (monitoring egress).
With port mirroring active, the device copies the traffic received and/or
forwarded on a source port to the destination port.
RM GUI L2E
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Release 8.0 05/2013