[atlas] Traceroute path consistency

Hi all, I have a suggestion regarding the udp traceroute feature: allowing the user to specify the source port. The motivation for this suggestion is to keep consistent paths between two traceroutes towards the same destination. I understand that the source port is used to discriminate concurrent traceroutes, so perhaps allocating a range for user-defined source ports would do the trick. There is of course the issue of two users selecting the same source port for the same destination but this is very unlikely. Do you think this is feasible ? David