Using Port Mirroring With External Rmon Probes - Alcatel Omni Switch/Router User Manual

Port Mirroring
where
port number of the mirrored port. For example, if the Admin Status of a port displayed as
then you would know this port is mirroring traffic for Port 2 on the module in Slot 3.
If a cable is not attached to the Mirrored port, port mirroring will not take place. In this case,
the Mirroring Port reverts back to its normally operational state and will bridge frames as if
port mirroring were disabled.

Using Port Mirroring With External RMON Probes

Port mirroring is a helpful monitoring tool when used in conjunction with an external
probe. Once you set up port mirroring, the probe can collect all relevant
traffic on the mirrored port. You can also move the Mirrored Port so that the Mirroring Port
receives data from different ports. In this way, you can roam the switch and monitor traffic at
various ports.
If you attach an external
that places it in the same
port, then you must again make sure that the
mirrored port.
Frames received from an
received by the Mirrored Port. These frames from the Mirroring Port are marked as if they are
received on the Mirrored Port before being sent over the switch backplane to an
Therefore, management frames from an
first forwarded out the Mirrored Port. After being received on the Mirrored Port, copies of the
frames are mirrored out the Mirroring Port—the probe attached to the Mirroring Port receives
the management frames. The illustration on the following page shows this data flow.
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is the slot number of the module containing the mirrored port, and
probe to a mirroring port, that probe must have an IP address
RMON
as the mirrored port. In addition if you change the mirrored
VLAN
Must be in same VLAN.
Mirrored and Mirroring Ports in Same VLAN
probe attached to the Mirroring Port can be seen as being
RMON
probe is in the same
RMON
station that are destined for the
NMS
is the
RMON
statistics for
RMON
as that new
VLAN
station.
NMS
probe are
RMON