Preferably, the link weights are adjusted to reduce the imbalance in link utilizations without deteriorating {HEAD ~ the cost} of {TAIL ~ network operation} 
Preferably , the link weights are adjusted to reduce the imbalance in link utilizations without deteriorating { HEAD ~ the cost } of { TAIL ~ network operation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL