ICMPv6 send Multicast Listener Report Message and Neighbor Solicitation

I am configuring ucarp on two on my pc router ie master and slave. Master is turned off and then turned on, recorded in tshark slave application there is icmpv6 multicast listener report message and neighbor solicitation. But I do not configure ipv6 in ucarp (using common address redundancy protocol). Is this an additional protocol that appears when the new master router is enabled?