Restrictions and guidelines: Multicast VLAN configuration

The VLAN to be configured as a multicast VLAN must exist.

If you have configured both a sub-VLAN-based multicast VLAN and a port-based multicast VLAN on a device, the port-based multicast VLAN configuration takes effect.

Do not configure a multicast VLAN on a device that is enabled with IP multicast routing. Otherwise, the system displays errors. Do not enable IP multicast routing on a device that is configured with multicast VLANs. Otherwise, multicast forwarding exceptions occur.

Do not configure a VLAN as a multicast VLAN or a multicast sub-VLAN if the VLAN interface is enabled with PIM or IGMP. Otherwise, the system displays errors. Do not enable PIM or IGMP on a VLAN interface if the VLAN interface belongs to a multicast VLAN or a multicast sub-VLAN. Otherwise, multicast forwarding exceptions occur.

The multicast VLAN feature does not take effect on secondary VLANs. As a best practice, do not configure the multicast VLAN feature for secondary VLANs. For more information about secondary VLANs, see Layer 2—LAN Switching Configuration Guide.