Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!CC5.BBN.COM!malis
From: malis@CC5.BBN.COM (Andy Malis)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: IP class B and C to X.25 address translation
Message-ID: <8801281048.AA16710@ucbvax.Berkeley.EDU>
Date: 27 Jan 88 16:50:38 GMT
References: <12620.8801261955@nap1.arpa>
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 13

Barry,

To reiterate my earlier message on the subject: for Class B, use
the same algorithm, but replace the Class A second octet with the
Class B third octet; in other words, treat the Class B number's
octets as n1.n2.h.i and use the Class A algorithm.

There is no standard for Class C - you have to roll your own
algorithm by dividing up the last octet into h and i bits.  It's
your choice as to which bits are h and which are i.  Once you've
done that, again follow the Class A algorithm.

Regards,
Andy