The value of the object sapIgmpSnpgCfgMvrFromVplsId specifies
from which Tls the multicast streams corresponding to
the groups learned via this SAP are copied.
Groups which cannot be joined to the corresponding MVR Tls
(because MVR is not up or the configured MVR policy rejects the group)
copy the multicast streams from the local Tls if IGMP snooping is up
(i.e. tlsIgmpSnpgCfgAdminState is 'enabled(1)').