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Re: Variable length internet addresses in TCP/IP: history

2012-02-14 22:47:57
Brian E Carpenter wrote:

With a fully backwards compatible transparent addressing scheme,
a much larger fraction of the nodes would have switched to actively
use IPv6 many years ago.

Why? They would have needed updated stacks. The routers would
have need updated stacks. The servers would have needed updated
stacks. The firewalls would have needed updated stacks. The load
balancers would have needed updated stacks. Many MIBs would have
needed to be updated. DHCP servers would have needed to be updated.
ARP would have needed to be updated, and every routing protocol.

With Realm Specific IP [RFC3102]:

   This document examines the general framework of Realm Specific IP
   (RSIP).  RSIP is intended as a alternative to NAT in which the end-
   to-end integrity of packets is maintained.  We focus on
   implementation issues, deployment scenarios, and interaction with
   other layer-three protocols.

what is necessary are minor modification on IPv4/transport stack
of new (but not existing) hosts and minor extension of DHCP.

                                                Masataka Ohta
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