On Tue, 17 May 2011 21:56:52 +0100, Colin Perkins <csp@xxxxxxxxxxxxx> wrote: > What's the concern here? Use the IANA registered port, unless specified > otherwise by the application. Any UDP tunnelling solutions must specify a > UDP port. The concern is that we have two (pairs of) ports. This does not only not fit in the standard SDP m=line, but it does not fit in the traditional sockaddr_in/sockaddr_in6 abstraction (and its equivalent in many programming languages/frameworks). It might be that the API makes the problem go away, but that seems like a risky bet in the absence of any sketch of an API (it would not need to be normative). -- RÃmi Denis-Courmont http://www.remlab.net/