Users Guide

intermediate switch that participates in the transport of mirrored trac must be congured with the reserved L2 VLAN. Remote
port monitoring supports mirroring sessions in which multiple source and destination ports are distributed across multiple switches
Remote Port Mirroring Example
Remote port mirroring uses the analyzers shown in the aggregation network in Site A.
The VLAN trac on monitored links from the access network is tagged and assigned to a dedicated L2 VLAN. Monitored links are
congured in two source sessions shown with orange and green circles. Each source session uses a separate reserved VLAN to
transmit mirrored packets (mirrored source-session trac is shown with an orange or green circle with a blue border).
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 106. 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.
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Port Monitoring