There's also bandwidthd which can be added to the list. Nfsen is the front end for nfdump (much like SiLK) with graphs and it has plugins to graph port usage, etc. On Apr 9, 2013, at 4:51 AM, Deric Kwok <deric.kwok2000 at gmail.com> wrote: > Hi all > > Do you know any opensource program bandwidthgraph by ipaddess? > > Thank you