The value of vRtrPimNgGenLagUsageOptimize specifies whether the
router should optimize usage of the LAG such that traffic for a given
multicast stream destined to an IP interface using the LAG is sent only
to the forwarding complex that owns the LAG link on which it will
actually be forwarded.
If this optimization is turned off, the traffic will be sent to all the
forwarding complexes that own at least one link in the LAG.
Changing the value of this object causes the PIM protocol to be
restarted.