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CLI-based Configuration Guide - IP Multicast

AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R007

This document describes the principles and configurations of IP multicast, and provides configuration examples.
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(Optional) Configuring a Static Router Port

(Optional) Configuring a Static Router Port


A router port is located on a Layer 2 device and connects to an upstream Layer 3 device (a multicast router or Layer 3 switch). When IGMP snooping is enabled in a VLAN, all interfaces in this VLAN learn forwarding entries from multicast protocol packets. When an interface receives IGMP Query messages or Protocol Independent Multicast (PIM) Hello messages, the Layer 2 device sets this interface as a dynamic router port. A router port provides the following functions:

  • Receives multicast data from the upstream device.
  • Forwards IGMP Report/Leave messages. IGMP Report/Leave messages received in a VLAN are forwarded only to router ports in the VLAN.

A dynamic router port has an aging time. If a dynamic router port does not receive an IGMP Query or a PIM Hello message before the aging time expires, the device deletes the port from the router port list. To enable an interface to forward IGMP Report/Leave messages to the upstream querier for a long time, configure the interface as a static router port.


  1. Run:


    The system view is displayed.

  2. (Optional) Run:

    vlan vlan-id

    The VLAN view is displayed.

  3. (Optional) Run:

    undo igmp-snooping router-learning

    Dynamic router port learning is disabled.

    By default, dynamic router port learning is enabled in a VLAN.

  4. (Optional) Run:


    Exit from the VLAN view.

  5. Run:

    interface interface-type interface-number

    The interface view is displayed.

  6. Run:

    igmp-snooping static-router-port vlan { vlan-id1 [ to vlan-id2 ] } &<1-10>

    An interface is configured as a static router port.

Updated: 2019-06-12

Document ID: EDOC1000097181

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