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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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Configuring the Aging Time of Multicast Traffic Triggered Entries in a VLAN

Configuring the Aging Time of Multicast Traffic Triggered Entries in a VLAN


When a multicast source no longer sends multicast data to a multicast group, the switch needs to delete the corresponding (S, G) or (*, G) entry. This requires constant probes on whether the multicast source sends multicast data flows. To enable the switch to update multicast entries and release entry resources in a timely manner, set the aging time of multicast traffic triggered entries in a VLAN. Then, if the switch does not receive multicast data sent to a multicast group within the aging time, the switch deletes the corresponding (S, G) or (*, G) entry.


  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

  3. Run multicast layer-2 ipv6 source-lifetime lifetime

    The aging time of multicast traffic triggered entries is set in the VLAN.

    By default, the aging time of multicast traffic triggered entries is 210 seconds.

    Configure aging time of (S, G) or (*, G) entries according to the number of the multicast forwarding entries used. If a large number of multicast entries are used on your network, a too short aging time will make the multicast forwarding table incomplete. However, if the aging time is too long, invalid entries will be retained for a long time, wasting system resources. The following table lists the recommended aging time values for different quantities of multicast forwarding entries.

  4. Run commit

    The configuration is committed.

Updated: 2019-04-20

Document ID: EDOC1100074724

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