Port Mirroring - Hirschmann rsb20 Reference Manual

Diagnostics

7.4 Port Mirroring

The port mirroring function enables you to review the data traffic at up to
8 ports of the device for diagnostic purposes. The device additionally
forwards (mirrors) the data for these ports to another port. This process is
also called port mirroring.
The ports to be reviewed are known as source ports. The port to which the
data to be reviewed is copied is called the destination port. You can only use
physical ports as source or destination ports.
In port mirroring, the device copies valid incoming and outgoing data packets
of the source port to the destination port. The device does not affect the data
traffic at 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.
The destination port forwards all data to be sent.
On the devices PowerMICE, MACH 104, MACH 1040 and MACH 4000, the
destination port blocks received data, on all other devices, the destinations
port also forwards received data.
 Select the source ports whose data traffic you want to review from the list
of physical ports by checkmarking the relevant boxes.
You can select a maximum of 8 source ports. Ports that cannot be
selected are displayed as inactive by the device, e.g. the port currently
being used as the destination port, or if you have already selected 8 ports.
Default setting: no source ports.
 Select the destination port to which you have connected your
management tool from the list element in the "Destination Port" frame.
The device does not display ports that cannot be selected in the list, e.g.
the ports currently being used as source ports. Default setting: port 0.0
(no destination port).
 Select "On" in the "Function" frame to switch on the function. Default
setting: "Off".
The "Reset configuration" button in the dialog allows you to reset all the port
mirroring settings of the device to the state on delivery.
RM Web L2B
Release 5.3 05/2012
7.4 Port Mirroring
109