----- Original Message ----- From: "Dr. Subrata Goswami" <[EMAIL PROTECTED]> > > I can not see how by just saying something is immutable going > to help. It would infact be the ground for more confusion,
If users use a field and expect it not to change, then carriers (ISPs?) have to take note of that. In IPv6++, every bit in the 40 byte header is used. The 20 bits that were not defined, have a 4-bit length field and a 16-bit value. There are also 16 other bytes for data. Small packets, such as the common ping, fit totally in the header. Add an IPv4 Routing Header in the front (where it belongs), and use all of the bits in that 20 byte data structure and call it a day. Why would carriers change those 60 bytes ? Jim Fleming Unir Corporation - UNIR and COM worlds @ http://www.activeworlds.com vPC + C+@ + IPv8 + 2,048 TLDs...this network solution is simple... http://www.ddj.com/articles/index/author/idx10133.htm -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
