{TAIL ~ The network} further includes a source of multicast packets in a multicast session coupled to a first node of {HEAD ~ the long haul portion} 
{ TAIL ~ The network } further includes a source of multicast packets in a multicast session coupled to a first node of { HEAD ~ the long haul portion }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD