Deleting Multicast Forwarding Entries

You can clear one or more forwarding entries from the multicast routing table. However, if you do so, the entries may reappear in the routing table if they are rediscovered.

clear ipv6 mroute

Use to delete IPv6 multicast forwarding entries.
If you specify an *, the router clears all IP multicast forwarding entries.
If you specify the IPv6 address of a multicast group, the router clears all multicast forward entries for that group.
If you specify the IPv6 address of a multicast group and the IPv6 address of a multicast source, the router clears the multicast entry that matches that group and source.
Example
host1:boston#clear ipv6 mroute *
There is no no version.
See clear ipv6 mroute.