Allied Telesis AT-S63 - Manual (Page 388)

Chapter 23: MLD Snooping Commands
388 Section III: IGMP Snooping, MLD Snooping, and RRP Snooping
The following command displays a list of active host nodes connected to
the switch:
show ipv6 mldsnooping hostlist
The following command displays a list of active multicast routers:
show ipv6 mldsnooping routerlist
Equivalent Command
show mldsnooping
For information, see “SHOW MLDSNOOPING” on page 384.