Date: Mon, 8 Apr 1996 09:51:22 PDT From: Bill Fenner <fenner@parc.xerox.com> To: Jim Fleming <JimFleming@unety.net> Cc: hackers@freebsd.org Subject: Re: Check IP Version Message-ID: <96Apr8.095128pdt.177476@crevenia.parc.xerox.com> In-Reply-To: Your message of "Sat, 06 Apr 96 22:28:56 PST." <01BB2419.36344C40@webster.unety.net>
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In message <01BB2419.36344C40@webster.unety.net> you write: >It is not desirable for new versions of IP to "break" existing code. I have not >provide this but in studying the SLIP code I see that there is never really >a check done to see of the IP header is of version 4. If you are running SLIP, then it is carrying IPv4. Run PPP if you want to do different protocols on one link. Note that the IPv6 people decided that there were too many broken implementations that don't check the IP version number, so they decided to get a new ethertype to carry IPv6 frames. Bill
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