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