Developing a NextGeneration Internet Architecture

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Developing a Next-Generation Internet Architecture

• Robert Braden, David Clark, et al
• Internal Whitepaper
• 2002. 09. 16
• Presented by Dong Wook Kim

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Contents

• Paper Approach
• Introduction
• Defining the Problem Space
• Developing A New Architecture
• Project Organization
• Conclusions

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Paper Approach
The limit of original internet architecture due
to increasing app. and variety of requirements
4
Introduction

• The term network architecture
• A set of abstract principles for the technical
  design of protocols and mechanisms for computer
  communications
• It is now time to revisit the internet
  architecture!!!
• The goal of a new-arch research program
• defines and prototypes a future architecture
  towards which the internet technology can evolve
• The new-arch project uses the experimental
  paradigm that worked well for the original
  internet research program

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Defining the Problem Space what is network
architecture? (1/3)

• Network architecture
• A set of high-level design principles that guides
  the technical design of the network
• The role is to ensure that the resulting design
  will be consistent and coherent
• E.g., the internet architecture

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Defining the Problem Space why is architecture
important? (2/3)

• It provides a basis for individual technical
  decisions
• Guides technical development such as protocol
  design in a consistent direction
• Without adequate architectural principles,
  designers with short-term goals often implement
  point solutions
• E.g., IntServ, DiffServ, IPSEC, firewalls, mobile
  IP, NAT, label switching, VPNs, Web caches, etc.

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Defining the Problem Space the original
requirements (3/3)

• A fundamental requirement of a new-arch research
  effort must be the choice of high-level
  requirements and goals
• The requirements underlying the original internet
  architecture Clark88
• Internetworking
• Robustness
• Heterogeneity
• Distributed management
• Cost
• Ease of attachment
• Accountability

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Developing A New Architecture New Architecture
Requirements (1/4)

• The development of an architecture must be guided
  in part by an understanding of the requirements
  to be met
• Major requirements arise from non-technical
  issues in the real world
• other requirements are the product of earlier
  technical decisions
• A new internet architecture must deal with a
  multi-ordered requirements set

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Developing A New Architecture New Architecture
Requirements (2/4)

• New requirements
• Mobility
• Policy-driven Auto-Configuration
• Auto-configuration of end systems and routers
• Highly time-variable resources
• E.g., switched backbone links, mobile devices,
  etc.
• Allocation of capacity
• Users and network administrators must have the
  ability to allocate capacity among users and
  applications

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Developing A New Architecture New Architecture
Design (3/4)

• Some components that need to develop a new
  internet architecture
• Examination of the areas in which the original
  architecture is known to have failed
• Examination of the changed and changing
  requirements
• Exploration of possible new meta-principles for
  an architecture
• Implementation of a proof-of-concept environment
• Iteration based on feedback from proof-of-concept
  experiments
• Etc.

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Developing A New Architecture New Architecture
Design (4/4)

• New meta-architectural principle
• The goal
• Explicitly minimize the degree of required global
  architectural consistency within the internet
• To allow as much regional flexibility as possible
  while still supporting the definition of
  end-to-end services

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Project Organization

• There is no commercial provider because the
  internet is open
• A new-arch research project proceed in two phases
• The first phase
• a team of individuals knowledgeable about network
  architecture develop a new prioritized
  requirement list
• The second phase
• It elaborate, demonstrate the designs using the
  combination of simulation, prototyping, testing

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Project Organization Proof-of-Concept for New
Architecture

• proof-of-concept component
• Build and test prototype protocols that are
  consistent with the architecture
• The objective is analogous to the working models
  of inventions used to the US Patent Office
• The purpose of a new architecture is to guide a
  large volume of further protocol engineering by
  researchers, vendors, etc.
• Four areas must be validated
• (1) scaling issues
• (2) heterogeneity
• (3) high performance
• (4) interaction with economic and business model

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Conclusions

• The internet architecture play a central role in
  the technical development of the internet
• Without an updated architecture, it will be a
  loss of functionality, adaptability, robustness
• Results of research efforts include a
  requirements definition, an architectural design,
  the design and validation of protocols to realize
  the architecture
• Evaluation of the concrete results of this
  project use conventional simulation, network
  experiments on prototype implementations