Future Internet Architectures: Toward an ArchitectureAgnostic Architecture

1
Future Internet Architectures Toward an
Architecture-Agnostic Architecture

• Jennifer Rexford
• Princeton University
• http//www.cs.princeton.edu/jrex

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Deciding Not to Decide

• Flexibility has been key to the Internets
  success
• Many different applications and services
• Beyond anything the initial designers ever
  envisioned
• Today this flexibility is limited to the end
  systems
• Not surprisingly, this is where we have seen
  innovation
• And, the inside is quite difficult to change
• Witness the fate of IPv6, QoS, multicast, secure
  routing
• Even if we could start over
• Maybe the design problem is over-constrained
• Too many goals, some of them conflicting

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Its Hard to be a Routing Protocol These Days

• Many, many design goals
• Global reachability
• Fast convergence
• Efficient use of resources
• Low protocol overhead
• Secure control plane
• Flexible routing policies
• ltyour wish list heregt
• Perhaps we cannot satisfy all of these goals
• Perhaps we should not even try

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Example Security vs. Reachability
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Example Convergence vs. Scalability
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Concurrent Architectures are Better than One

• Virtualization
• Multiple logical routers on a single platform
• Resource isolation in CPU, FIBs, and bandwidth
• Programmability
• General-purpose CPUs for control and manipulation
• Network processors and FPGAs for fast forwarding
• Third-party providers for routing and forwarding
  solutions
• Economic refactoring
• Infrastructure provider manage routers and links
• Service provider offer end-to-end services

http//www.cs.princeton.edu/jrex/papers/cabo.pdf