Dell Networking 7048 Reference Manual page 562

Operational Version
When the optional argument detail is used, the command shows the global
information and the information for all Querier enabled VLANs as well as the
following information:
Last Querier Address
MLD Version
562
IPv6 MLD Snooping Querier Commands
Indicates the version of MLD that will be used while
sending out the queries. This is defaulted to MLD v1
and it can not be changed.
Indicates the IP address of the most recent Querier from
which a Query was received.
Indicates the version of MLD.