not sure if this meets your requirements, but if you want an appliance there are:
http://www.visualnetworks.com/ http://www.networkinstruments.com/ -r -- +++ATH 7MN; {{{
not sure if this meets your requirements, but if you want an appliance there are:
http://www.visualnetworks.com/ http://www.networkinstruments.com/ -r -- +++ATH 7MN; {{{