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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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  • Mirrored port

    All the packets passing through a mirrored port are copied to a local observing port.

  • Local observing port

    In local packet mirroring, a local observing port is connected to a monitoring device and is used to export the packets copied from a mirrored port.

Port Mirroring

A packet passing through a mirrored port is copied and then sent to a specified monitoring device for analysis and monitoring, as shown in Figure 28-8.

Figure 28-8  Networking diagram of port mirroring

Port mirroring can be performed on the packets in the following directions:
  • Inbound: mirrors the packets that are received by the port.

  • Outbound: mirrors the packets that are sent by the port.

  • Bidirectional: mirrors the packets that are sent and received by the port.


If the mirrored port and observing port are added to the same port isolation group in Layer 2 isolation mode, the inbound traffic on the mirrored port is isolated and cannot reach the observing port; however, the outbound traffic on the mirrored port is not isolated and is still mirrored to the observing port.

Updated: 2019-01-11

Document ID: EDOC1000176006

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