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