./exfields.pl -e MonName,ifSpeed,DstDev pptop.20000921.gz 

nyc1-br2/nyc4-br2:1.t3            45045000             nyc4-br2
nyc1-br2/nyc4-br2:2.t3            45045000             nyc4-br2
nyc1-br2/nyc4-br2:3.t3            45045000             nyc4-br2
nyc1-cr1/nyc4-br1.t3              44210000             nyc4-br1
nyc1-br1/nyc2-cr1.t3              45045000             nyc2-cr1
nyc4-br2/cleveland1-br1.2.t3      45045000       cleveland1-br1
nyc4-br2/cleveland1-br2.t3        44210000       cleveland1-br2
nyc4-br2/nyc1-br2:1.t3            45045000             nyc1-br2
nyc4-br2/nyc1-br2:2.t3            45045000             nyc1-br2
nyc4-br2/nyc1-br2:3.t3            45045000             nyc1-br2
nyc4-nbr2/nycmny1-br1.oc12        622000000          nycmny1-br1