In V100R002, to configure multicast VLAN replication on a ring network, you need to run the multicast user-vlan command to configure the multicast VLAN as the user VLAN.
In V100R003, V100R005, V100R006, V200R001, V200R002, and V200R003, a multicast VLAN is the user VLAN of itself by default, so you do not need to run the multicast uservlan command.
When configuring multicast VLAN replication on the S2300, or S5300LI, pay attention to the following constraints:

•  A user-side interface can be added to only one user VLAN. If the interface is added to multiple user VLANs, the user VLAN where multicast entries are generated first takes effect.

•  The user-side interface also needs to be added to the multicast VLAN in the same mode as it is added to the user VLAN. For example, if the user-side interface is added to the user VLAN in untagged mode, it must be added to the multicast VLAN in untagged mode.

•  To prevent broadcast of unknown multicast packets, enable the switch to drop unknown multicast packets. On the S2300, run the multicast drop-unknown in the system view to enable this function. On the S5300LI, run the multicast drop-unknown in the VLAN view to enable this function.