The value of the object sapMldSnpgGrpV1HostExpTime indicates
the time remaining until the system will assume that
there are no longer any MLDv1 members on this SAP.
Upon hearing any MLDv1 Membership Report, this value is reset to the
group membership interval. While this time remaining is non-zero, the
system ignores any MLDv2 'leave' messages for this group that it
receives on this SAP.