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Configuration Guide - Network Management and Monitoring
S1720, S2700, S5700, and S6720 V200R011C10

This document provides the configurations of network management and monitoring features supported by the product, including SNMP, RMON and RMON2, LLDP, Performance Management, iPCA, NQA, Service Diagnosis, Mirroring, Packet Capture, NetStream, sFlow, TWAMP Light, and NETCONF.

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Configuring Local Port Mirroring

Configuring Local Port Mirroring


In local port mirroring, an observing port is directly connected to a monitoring device and directly forwards the packets copied from a mirrored port to the monitoring device for analysis.


  1. Run the system-view command to enter the system view.
  2. Configure local observing ports.

    • Configure a single local observing port.

      Run the observe-port [ observe-port-index ] interface interface-type interface-number [ untag-packet ] command to configure a local observing port.

    • Configure multiple local observing ports in a batch. (This configuration mode is supported only by the S5720EI, S5720HI, S6720S-EI, and S6720EI.)

      1. Run the observe-port [ observe-port-index ] interface-range { interface-type interface-number [ to interface-type interface-number ] } &<1-n> [ untag-packet ] command to configure multiple local observing ports in a batch.

        n in &<1-n> is 4 on the S5720EI, S6720S-EI, and S6720EI and 8 on the S5720HI, indicating that this command can be configured four times on the S5720EI, S6720S-EI, and S6720EI, and eight times on the S5720HI.

      2. (Optional) Run the observe-port observe-port-index interface-range { add | delete } interface-type interface-number command to add or delete local observing ports to or from multiple local observing ports configured in a batch.

    An observing port is dedicated to forwarding mirrored traffic. Do not configure other services on an observing port; otherwise, mirrored traffic and other service traffic interfere with each other.

  3. Bind a mirrored port to an observing port.

    1. Run the interface interface-type interface-number command to enter the interface view.

    2. Run the port-mirroring to observe-port observe-port-index { both | inbound | outbound } command to bind the mirrored port to a specified observing port.

      • inbound: copies the packets received by a mirrored port to an observing port.

      • outbound: copies the packets sent by a mirrored port to an observing port.

      • both: copies the packets received and sent by a mirrored port to an observing port.

      • In 1:N mirroring, if you bind a mirrored port to multiple observing ports in a batch in either the inbound or outbound direction, the mirrored port cannot be bound to other observing ports in the same direction.

      • Both physical interfaces and Eth-Trunks can be configured as mirrored ports. If an Eth-Trunk is configured as a mirrored port, its member ports cannot be configured as observing ports.

Verifying the Configuration

  • Run the display observe-port command to check the observing port configuration.
  • Run the display port-mirroring command to check the mirroring configuration.

Configuration Tips

Restoring the default configuration of an Ethernet port or Eth-Trunk configured as an observing port

  1. Unbind the mirrored port from the observing port.

    [HUAWEI] interface gigabitethernet x/x/x
    [HUAWEI-GigabitEthernetx/x/x] undo port-mirroring to observe-port x inbound/outbound/both
    [HUAWEI-GigabitEthernetx/x/x] quit
  2. Delete the observing port configuration in the system view.

    [HUAWEI] undo observe-port x
  3. After steps 1 and 2 are complete, the default configuration of the Ethernet port or Eth-Trunk is restored. You can then configure other services on the Ethernet port or Eth-Trunk.

Updated: 2020-02-06

Document ID: EDOC1000178174

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