IPng White Paper on Transition and Other Considerations (RFC1671)
Original Publication Date: 1994-Aug-01
Included in the Prior Art Database: 2000-Sep-12
Internet Society Requests For Comment (RFCs)
This document was submitted to the IETF IPng area in response to RFC 1550. Publication of this document does not imply acceptance by the IPng area of any ideas expressed within. Comments should be submitted to the firstname.lastname@example.org mailing list.
Network Working Group B. Carpenter
Request for Comments: 1671 CERN
Category: Informational August 1994
IPng White Paper on Transition and Other Considerations
Status of this Memo
This memo provides information for the Internet community. This memo
does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.
This document was submitted to the IETF IPng area in response to RFC
1550. Publication of this document does not imply acceptance by the
IPng area of any ideas expressed within. Comments should be
submitted to the email@example.com mailing list.
This white paper outlines some general requirements for IPng in
selected areas. It identifies the following requirements for stepwise
A) Interworking at every stage and every layer.
B) Header translation considered harmful
D) IPv4 to IPng address mapping.
E) Dual stack hosts.
G) Smart dual-stack code.
H) Smart management tools.
Some remarks about phsysical and logical multicast follow, and it is
suggested that a model of how IPng will run over ATM is needed.
Finally, the paper suggests that the requirements for policy routing,
accounting, and security firewalls will in turn require all IPng
packets to carry a trace of the type of transaction involved as well
as of their source and destination.
Transition and deployment
It is clear that the transition will take years and that every site
will have to decide its own staged transition plan. Only the very
smallest sites could envisage a single step ("flag day") transition,
presumably under pressure from their Internet service providers.
Furthermore, once the IPng decision is taken, the next decade (or
more) of activity in the Internet and in all private networks using
the Internet suite will be strongly affected by the process of IPng
deployment. User sites will look at the decision whether to change
from IPv4 in the same way as they have looked in the past at changes
of programming language or operating system. It may not be a foregone
conclusion that what they change to is IPng. Their main concern will
be to minimise the cost of the change and the risk of lost
This concern immediately defines strong constraints on the model for
transition and deployment of IPng. Some of these constraints are
listed below, with a short explanation of each one.
Terminology: an "IPv4 host" is a host that...