The function that transmits MLD queries only when the topology changes is disabled by default.
SEFOS(config)# configure terminal SEFOS(config)# ipv6 mld snooping send-query enable SEFOS(config)# end
SEFOS# show ipv6 mld snooping globals Snooping Configuration ----------------------------- MLD Snooping globally enabled MLD Snooping is operationally enabled Transmit Query on Topology Change globally enabled Multicast forwarding mode is MAC based Proxy reporting globally enabled Router port purge interval is 125 seconds Port purge interval is 260 seconds Report forward interval is 5 seconds Group specific query interval is 2 seconds Reports are forwarded on router ports Group specific query retry count is 2