A method 1, wherein the cost value for {HEAD ~ a logical link} is defined as the bandwidth of the logical link times the delay in {TAIL ~ the logical link} 
A method 1 , wherein the cost value for { HEAD ~ a logical link } is defined as the bandwidth of the logical link times the delay in { TAIL ~ the logical link }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL