R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

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Port mirroring classification and implementation
Port mirroring includes local port mirroring and remote port mirroring based on whether the mirroring
source and the mirroring destination are on the same device.
Local port mirroring
In local port mirroring, the mirroring source and mirroring destination are on the same device, and the
source device is directly connected to the data monitoring device and can act as the destination device
to forward mirrored packets to the data monitoring device. A mirroring group that contains the mirroring
source and the mirroring destination on the device is called a "local mirroring group."
Figure 44 Local port mirroring implementation
As shown in Figure 44, configure local port mirroring to copy inbound packets on the source port
Ethernet 1/1 to the monitor port Ethernet 1/2, which then forwards the packets to the data monitoring
device for analysis.
Layer 2 remote port mirroring
In remote port mirroring, the source device is not directly connected to the data monitoring device. The
source device copies mirrored packets to the destination device, which forwards them to the data
monitoring device. The mirroring source and the mirroring destination are on different devices and in
different mirroring groups. The mirroring group that contains the mirroring source or the mirroring
destination is called a "remote source group" or "remote destination group," respectively. The devices
between the source devices and the destination device are intermediate devices.
Layer 2 remote port mirroring refers that the mirroring source and the mirroring destination are located
on different devices on a same Layer 2 network.