The link weights are preferably adjusted to reduce the cost of {HEAD ~ network operation} without increasing {TAIL ~ the imbalance} in link utilizations 
The link weights are preferably adjusted to reduce the cost of { HEAD ~ network operation } without increasing { TAIL ~ the imbalance } in link utilizations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH