To enable multicast filters on Ethernet interfaces when IPv6 NAT is used for neighbor discovery, you must include the ipv6-multicast-interfaces statement at the [edit services nat] hierarchy level.
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ipv6-multicast-interfaces (all interface-name);
By default, multicast filters are not enabled on media interfaces. To enable filters on all interfaces, include the ipv6-multicast-interfaces all statement. To enable filters on a specified interface only, include the ipv6-multicast-interfaces interface-name statement.