Enable/Disable Parameter indicates whether
the IGMP Relay Per-Stream Redundancy is enabled
or disabled.
Per-Stream Redundancy allows a stream to fail over
to backup link if it is not received on the primary
link for a period of wfIgmpBaseRelayTimeoutValue,
and then fall back if the stream is received on
the primary link again.
To enable this feature, you must enable
wfIgmpBaseRelayEnable.