Setup Guide

The reserved VLANs transport the mirrored trac in sessions (blue pipes) to the destination analyzers in the local network. Two destination
sessions are shown: one for the reserved VLAN that transports orange-circle trac; one for the reserved VLAN that transports green-
circle trac.
Figure 107. Remote Port Mirroring
Conguring Remote Port Mirroring
Remote port mirroring requires a source session (monitored ports on dierent source switches), a reserved tagged VLAN for transporting
mirrored trac (congured on source, intermediate, and destination switches), and a destination session (destination ports connected to
analyzers on destination switches).
Conguration Notes
When you congure remote port mirroring, the following conditions apply:
• You can congure 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 trac by prexing the reserved VLAN tag to monitored packets so that they are
copied to the reserve VLAN.
• Mirrored trac 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.
Port Monitoring
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