Subj : IPv6 and privacy
To   : Michiel van der Vlist
From : Markus Reschke
Date : Sun Jan 11 2015 12:13:40

Hi Michiel!

Jan 11 10:47 2015, Michiel van der Vlist wrote to Markus Reschke:

 MR>> Have you heard about their idea of prefix coloring for IPv6?

 MvdV> Vaguely. It was one of the things that I filed under: "Hmmm.. if 
 MvdV> this turns out to be a good idea, I will have a look at it when I 
 MvdV> get a rountoit.

You're lucky, it's a very bad idea. Prefix coloring uses some bits of the prefix to categorize services, e.g. web, VoIP and video-on-demand. The customer gets a dedicated prefix for each service. In the case of three services he'll get three prefixes. That design would make filtering and QoS in the provider's routers more easy, if supported. But the customer's devices have to select the right prefix, i.e. the VoIP telephone has to select the VoIP prefix, the PC the web prefix and so on. If you got a softphone on your PC the OS has to select the VoIP prefix for the softphone and the web prefix for the web browser. Do you see the problems?

Regards,
Markus

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