Overview of 1999 IAB Network Layer Workshop
RFC 2956

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 03

Network Working Group                                            M. Kaat
Request for Comments: 2956                   SURFnet ExpertiseCentrum bv
Category: Informational                                     October 2000

              Overview of 1999 IAB Network Layer Workshop

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

Abstract

   This document is an overview of a workshop held by the Internet
   Architecture Board (IAB) on the Internet Network Layer architecture
   hosted by SURFnet in Utrecht, the Netherlands on 7-9 July 1999.  The
   goal of the workshop was to understand the state of the network layer
   and its impact on continued growth and usage of the Internet.
   Different technical scenarios for the (foreseeable) future and the
   impact of external influences were studied.  This report lists the
   conclusions and recommendations to the Internet Engineering Task
   Force (IETF) community.

Table of Contents

   1. Introduction . . . . . . . . . . . . . . . . . . . . . . .  2
   2. Conclusions and Observations . . . . . . . . . . . . . . .  3
    2.1  Transparency. . . . . . . . . . . . . . . . . . . . . .  3
    2.2  NAT, Application Level Gateways & Firewalls . . . . . .  4
    2.3  Identification and Addressing . . . . . . . . . . . . .  4
    2.4  Observations on Address Space . . . . . . . . . . . . .  5
    2.5  Routing Issues. . . . . . . . . . . . . . . . . . . . .  5
    2.6  Observations on Mobility. . . . . . . . . . . . . . . .  6
    2.7  DNS Issues. . . . . . . . . . . . . . . . . . . . . . .  7
    2.8  NAT and RSIP. . . . . . . . . . . . . . . . . . . . . .  7
    2.9  NAT, RSIP and IPv6. . . . . . . . . . . . . . . . . . .  8
    2.10 Observations on IPv6. . . . . . . . . . . . . . . . . .  9
   3. Recommendations. . . . . . . . . . . . . . . . . . . . . . 10
    3.1 Recommendations on Namespace . . . . . . . . . . . . . . 10
    3.2 Recommendations on RSIP. . . . . . . . . . . . . . . . . 10
    3.3 Recommendations on IPv6. . . . . . . . . . . . . . . . . 10
    3.4 Recommendations on IPsec . . . . . . . . . . . . . . . . 11

Kaat                         Informational                      [Page 1]
RFC 2956            1999 IAB Network Layer Workshop         October 2000

    3.5 Recommendations on DNS . . . . . . . . . . . . . . . . . 11
    3.6 Recommendations on Routing . . . . . . . . . . . . . . . 12
    3.7 Recommendations on Application Layer and APIs. . . . . . 12
   4. Security Considerations. . . . . . . . . . . . . . . . . . 12
   References. . . . . . . . . . . . . . . . . . . . . . . . . . 13
   Appendix A. Participants. . . . . . . . . . . . . . . . . . . 15
   Author's Address. . . . . . . . . . . . . . . . . . . . . . . 15
   Full Copyright Statement  . . . . . . . . . . . . . . . . . . 16

1. Introduction

   From July 7 to July 9, 1999 the Internet Architecture Board (IAB)
   held a workshop on the architecture of the Internet Network Layer.
   The Network Layer is usually referred to as the IP layer.  The goal
   of the workshop was to discuss the current state of the Network Layer
   and the impact various currently deployed or future mechanisms and
   technologies might have on the continued growth and usage of the
   Internet.

   The most important issues to be discussed were:

   o  Status of IPv6 deployment and transition issues
   o  Alternative technical strategies in case IPv6 is not adopted
   o  Globally unique addresses and 32 bit address depletion
   o  Global connectivity and reachability
   o  Fragmentation of the Internet
   o  End to end transparency and the progressive loss thereof
   o  End to end security
   o  Complications of address sharing mechanisms (NAT, RSIP)
   o  Separation of identification and location in addressing
   o  Architecture and scaling of the current routing system

   The participants looked into several technical scenarios and
   discussed the feasibility and probability of the deployment of each
   scenario.  Among the scenarios were for example full migration to
   IPv6, IPv6 deployment only in certain segments of the network, no
   significant deployment of IPv6 and increased segmentation of the IPv4
   address space due to the use of NAT devices.

   Based on the discussion of these scenarios several trends and
   external influences were identified which could have a large impact
   on the status of the network layer, such as the deployment of
   wireless network technologies, mobile networked devices and special
   purpose IP devices.

Kaat                         Informational                      [Page 2]
RFC 2956            1999 IAB Network Layer Workshop         October 2000

   The following technical issues were identified to be important goals:

   o  Deployment of end to end security