On 18/01/12 10:38, Nick Ryce wrote: > Can nfdump/nfsen show useage per AS number as I cannot see anything on their site? I don't know if it's in earlier versions, but the latest version of nfdump has aggregation / summary by asnum, e.g. nfdump <...> -a -A srcas,dstas ...or: nfdump <...> -s srcas -s dstas