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Configuration Guide - IP Multicast

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Setting the Aging Time of Dynamic Router Ports

Setting the Aging Time of Dynamic Router Ports


A router port sends Report messages to the upstream Layer 3 device and receives multicast packets from the upstream device. After MLD snooping is configured, the device can dynamically learn router ports to monitor messages sent by the upstream device. If a network is congested or unstable, a dynamic router port may not receive an MLD General Query message or a PIM Hello message before the timeout. In this situation, the device deletes the router port from the router port list, interrupting multicast data forwarding. You can increase the aging time of the router port.


  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

  3. Run mld snooping router-aging-time router-aging-time

    The aging time for dynamic router ports is configured.

    By default, the aging time of router ports that a device learns from MLD Query messages is 180 seconds and the aging time of router ports that the device learns from PIM Hello messages is the Holdtime value in PIM Hello messages.

  4. Run commit

    The configuration is committed.

Updated: 2019-04-20

Document ID: EDOC1100074724

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