The MLDNoUnnecDoneRpt (No Unnecessary Done Report) option of the TCPIP OPTION command prevents a done report from being sent.
If a node receives another node's report for a multicast address while it has a pending action for that same address, a report for that address does not need to be sent thus suppressing duplicate reports on the link. The default for this option is OFF.
To enable this option, enter the following:
NW TCPIP OPT + MLDNoUnnecDoneRpt