Input to IPng Engineering Considerations (RFC1670)
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 D. Heagerty
Request for Comments: 1670 CERN
Category: Informational August 1994
Input to IPng Engineering 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 expresses some personal opinions on IPng engineering
considerations, based on experience with DECnet Phase V transition.
It suggests breaking down the IPng decisions and transition tasks
into smaller parts so they can be tackled early by the relevant
In order to allow key decisions to be taken early, I would like to
see IPng decisions and timescales broken down into into smaller
parts, for example:
- address structure and allocation mechanism
- name service changes
- host software and programming interface changes
- routing protocol changes
Although interrelated, not all details need to be defined by the same
date. Identify which decisions will be hard to change and which can
be allowed to evolve. All changes should be worked on in parallel,
but the above list indicates a feeling for urgency of a decision.
Our experience has been that administrative changes (as may be
required for addressing changes) need the greatest elapse time for
implementation, whereas routing protocol changes need the least.
I would like to see an early decision on address structure and enough
information for service managers to start planning their transition.
Some hosts will never be upgraded and will need to be phased out or
configured with reduced connectivity. A lead time of 10 years (or
more) will help to take good long term technical decisions and ease
financial and organisational constraints.
Transition and deployment
Transition requires intimate knowledge of the environment (financial,
political as well as technical). The task needs to be broken down so
that service managers close to their clients can take decisions and
make them happen.
Let the service managers adapt the solutions for their environment by
providing them with a transition toolbox and scenarios of their uses
based on real examples. Clearly state the merits and limitations of
different transition strategies.
Provide for transition autonomy. Let systems and sites transition at
different times, as convenient for them.
Identify what software needs to be changed and keep an up-to-date
Identify what is essential to have in place so that service managers