Routing traffic only in a providers network might be easily achievable for the simple reason that an Internet service provider can control their own network, but how can a European-wide "Schengen Routing" be implemented? There must be an exchange between routing possibilities and much more sensible Internet service provider information to ensure that data, sent from one Internet service provider to another, arising not to leave "Schengen Routing" area really stays with these boundaries. For example, these aspects lead to the fact that QSC AG, a Deutsche Telekom competitor, raised the question about the possibility of protecting traffic with this approach, since it might be impossible to determine data that would travel nationally or internationally.
