3Com S7906E - Switch, Configuration Manual

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1-4
Figure 1-3 Layer 3 remote port mirroring implementation
On the source device, packets of the mirroring port (or CPU) are mirrored to the tunnel interface that
serves as the monitor port in the remote source mirroring group, and then transmitted to the destination
device through the GRE tunnel. The destination device receives the mirrored packets from the other
tunnel interface that serves the mirroring port in the remote destination mirroring group, and then
forwards the packets to the monitor port in the remote destination mirroring group. In this way, the data
monitoring device connected to the monitor port on the destination device can monitor and analyze
packets passing through the mirroring port (or CPU) on the source device.
z
For more information about GRE tunnels, see Tunnel Configuration in the IP Services Volume .
z
Only the SD and EB series LPUs support Layer 3 remote port mirroring.
Configuring Local Port Mirroring
Local Port Mirroring Configuration Task List
Configuring local port mirroring is to configure local mirroring groups.
A local mirroring group comprises one or multiple mirroring port and one monitor port that are located
on a same device.
Complete these tasks to configure a local mirroring group:
Task Remarks
Creating a Local Mirroring Group Required
Configuring Mirroring Ports for the Local Mirroring Group Required
Configuring the Monitor Port for the Local Mirroring Group Required
Generally, a port can belong to only one mirroring group. On an SD or EB series LPU, however, a port
can be assigned to two mirroring groups as a mirroring port.