Vernon Schryver wrote: >>To: marelines@yahoo.com, ietf@ietf.org >>Cc: nabe@iij.ad.jp >>Subject: Re: Proprietary IP Protocol Type >>From: Kuniaki Kondo <kuniaki@iij.ad.jp> >> > >>>I am working on a distributed router and i want to run my own proprietary protocol inside over >>>the IP layer. ... >>> > >> I also have a same question. >> I would like to get a document which is described assignment criteria, >> current being used, etc... >> >> If someone know, please advice me. >> > > Please do not be offended, but if you do not already know the answers > to such questions or at least better places than the main IETF mailing > list to ask them, then it is practically certain that you would be > better served to use UDP/IP instead of raw IP. > > The number of available IP protocol numbers is infinitesimal compared > to the number of UDP port numbers. (The host addresses can be seen > as qualifying port numbers, but protocol numbers are global.) For prototyping, you don't need to worry about port or even protocol number collisions. Use a checksum to ensure that you're interpretation of incoming packets is correct, and ignore those whose checksums err. Unless the protocol number is in common use, the overhead will be sufficiently low. Joe