Enabling dropping unknown IPv6 multicast data

About dropping unknown IPv6 multicast data

Unknown IPv6 multicast data refers to IPv6 multicast data for which no forwarding entries exist in the MLD snooping forwarding table. This feature enables the device to forward unknown IPv6 multicast data only to the router port. If the device does not have a router port, unknown IPv6 multicast data will be dropped.

If you do not enable this feature, the unknown IPv6 multicast data is flooded in the VLAN or VSI to which the data belongs.

Restrictions and guidelines

When dropping unknown IPv6 multicast data is enabled, the device also drops unknown IPv4 multicast data.

When dropping unknown IPv6 multicast data is enabled, the device still forwards unknown IPv6 multicast data out of router ports (except the receiving router port).

Enabling dropping unknown IPv6 multicast data for a VLAN

  1. Enter system view.

    system-view

  2. Enter VLAN view.

    vlan vlan-id

  3. Enable dropping unknown IPv6 multicast data for the VLAN.

    mld-snooping drop-unknown

    By default, dropping unknown IPv6 multicast data is disabled. Unknown IPv6 multicast data is flooded.

Enabling dropping unknown IPv6 multicast data for a VSI

  1. Enter system view.

    system-view

  2. Enter VSI view.

    vsi vsi-name

  3. Enable dropping unknown IPv6 multicast data for the VSI.

    mld-snooping drop-unknown

    By default, dropping unknown IPv6 multicast data is disabled. Unknown IPv6 multicast data is flooded.