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Configuration Guide - Network Management and Monitoring

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, NETCONF, OpenFlow, LLDP, NQA, Mirroring, Packet Capture, Packet Trace, Path and Connectivity Detection Configuration, NetStream, sFlow, and iPCA.
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Understanding Mirroring

Understanding Mirroring


  • Mirrored port

    A mirrored port is a monitored port on which all the packets or packets matching traffic classification rules are copied to an observing port.

  • Observing port

    An observing port is connected to a monitoring device and transmits the packets copied from a mirrored port to the monitoring device.

  • Observing port group

    An observing port group consists of member ports connected to different monitoring devices. When an observing port group is configured for packet mirroring, packets mirrored to the observing port group are copied to all the member ports of the port group.


    Only the CE6870EI/CE6875EI supports observing port groups.

Port Mirroring

Packets passing through a mirrored port are copied and then sent to a specified observing port for analysis and monitoring, as shown in Figure 9-1.

Figure 9-1 Networking diagram of port mirroring

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

  • Outbound: mirroring the packets that are sent by the mirrored port.

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

Traffic Mirroring

Traffic mirroring is used to copy specified packets passing through a mirrored port to an observing port for analysis and monitoring. In traffic mirroring, a traffic policy containing a traffic mirroring behavior is applied to a mirrored port. If packets passing through a mirrored port match traffic classification rules, the packets are copied to an observing port, as shown in Figure 9-2.

Figure 9-2 Schematic diagram of traffic mirroring

VLAN Mirroring

VLAN mirroring is used to copy packets on all active ports in a specified VLAN to an observing port. Users can monitor packets in one or more VLANs.

Updated: 2019-04-20

Document ID: EDOC1100075365

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