Figure 103. Remote Port Mirroring
Configuring Remote Port Mirroring
Remote port mirroring requires a source session (monitored ports on different source switches), a reserved tagged VLAN for transporting
mirrored traffic (configured on source, intermediate, and destination switches), and a destination session (destination ports connected to
analyzers on destination switches).
Configuration Notes
When you configure remote port mirroring, the following conditions apply:
•
You can configure any switch in the network with source ports and destination ports, and allow it to function in an intermediate
transport session for a reserved VLAN at the same time for multiple remote-port mirroring sessions. You can enable and disable
individual mirroring sessions.
•
BPDU monitoring is not required to use remote port mirroring.
•
A remote port mirroring session mirrors monitored traffic by prefixing the reserved VLAN tag to monitored packets so that they are
copied to the reserve VLAN.
•
Mirrored traffic is transported across the network using 802.1Q-in-802.1Q tunneling. The source address, destination address and
original VLAN ID of the mirrored packet are preserved with the tagged VLAN header. Untagged source packets are tagged with the
reserve VLAN ID.
•
You cannot configure a private VLAN or a GVRP VLAN as the reserved RPM VLAN.
•
The RPM VLAN can't be a Private VLAN.
•
The RPM VLAN can be used as GVRP VLAN.
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Port Monitoring