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