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Evolvability vN-Bone Legacy Apps and Overlays Summary Towards an Evolvable Internet Architecture Thomas Lohm uller lthomas@student.ethz.ch December 19, 2007 Thomas Lohm uller Towards an Evolvable Internet Architecture Evolvability

  1. Evolvability vN-Bone Legacy Apps and Overlays Summary Towards an Evolvable Internet Architecture Thomas Lohm¨ uller lthomas@student.ethz.ch December 19, 2007 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  2. Evolvability vN-Bone Legacy Apps and Overlays Summary Towards an Evolvable Internet Architecture Topics: How to evolve from IPv(N-1) to IPvN How to use overlay networks in legacy applications Goals: Show some nice ideas for evolvability Describe needed technologies Show creative way how to use legacy applications with new network technologies Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  3. Evolvability vN-Bone Legacy Apps and Overlays Summary Outline Evolvability 1 vN-Bone 2 Legacy Apps and Overlays 3 Summary 4 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  4. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Outline Evolvability 1 Introduction Requirements for vN-Bone 2 Evolvability Mechanisms for Legacy Apps and Overlays 3 Evolvability Summary 4 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  5. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Introduction Today everyone wants to change the Internet. Why is it so hard to change? Why did the different approaches not work? How can we make the Internet changeable? Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  6. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Once upon a Time... In the early days of commercial Internet (mid 1990’s) Great faith in Internet evolution. Many believed ISPs would soon deploy new versions of IP But it came different... Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  7. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Today Success of the Internet surpassed our wildest imagination Deep pessimism about evolutionary architectural change ISPs have little incentive to deploy new architectures Most operating systems do not support new protocols Costs of universally deploying a new architecture are immense Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  8. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Requirements What is required to make the Internet evolvable? Foster independent innovation Enable customer choice Allow ISPs some degree of control Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  9. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Basic Assumptions 1/2 A1 : Assume partial ISP deployment. Not all ISP’s will deploy a new version of IP at the same time. Must work with only a subset of an ISP’s routers implementing it. A2 : Assume partial ISP participation. Not all ISP’s are willing to participate. Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  10. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Basic Assumptions 2/2 A3 : Assume the existing market structure and agreements. Clients should not need a contract with an additional provider. A4 : Assume revenue flow. Assume that IPvN attracts users. Require Universal Access All clients can use IPvN if they choose regardless of whether their ISP deploys IPvN or not. Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  11. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Open Problems Problems on our way to IPvN: Client-Side Network Locate IPvN router Topology construction 1 1 Move packets to IPvN Addressing 2 2 router Routing 3 Get IPvN address 3 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  12. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Option I: Application-Level Redirection Why this is not a good choice. Application queries a lookup-service for IPvN router Application has to tunnel packets to IPvN router Problems: Who runs this lookup service? Current ISPs Third-party broker How to reach lookup-service? Who pays for this service? Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  13. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Option II: Network-Level Redirection The better solution. Every router in network (whether IPvN or not) knows how to forward an IPvN packet to an IPvN router Works with current market structure How can a client in a non-offering ISP be guaranteed access? Support IPvN Do some "magic" here ... D P X Y Q Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  14. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary IP Anycast Host transmits to an anycast address Network is responsible for delivery to one of possibly multiple servers Described in RFC 1546 Today in use for root DNS name servers Enables seamless spread of deployment Does not require any change in current routing infrastructure Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  15. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary IP Anycast Today, this system does work. < lthomas@optimus-ws5:101 > traceroute 192.88.99.1 traceroute to 192.88.99.1, 30 hops max, 40 byte packets 1 rou-rz-1-service-inf-isg-rz.ethz.ch (129.132.216.33) 2 rou-ref-hg-service-inf.ethz.ch (10.1.18.38) 3 rou-fw-cla-service-inf-isg.ethz.ch (10.1.18.34) 4 rou-fw-rz-fw-cla.ethz.ch (192.33.92.185) 5 rou-rz-gw-fwrz-gwrz-core.ethz.ch (192.33.92.170) 6 swiez2.ethz.ch (192.33.92.11) 7 swiLS2-10GE-1-1.switch.ch (130.59.36.205) 8 swiEL2-10GE-1-2.switch.ch (130.59.36.70) 9 swiCE3-10GE-1-3.switch.ch (130.59.37.65) 10 swi6netCE1-G0-0.switch.ch (130.59.35.137) Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  16. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Anycast Routing I Intra-Domain-Routing IPvN router advertises link to anycast address Link-state routing (OSPF) High-cost link to prevent routing through anycast address IPvN router can easily identify other IPvN routers Distance-vector routing (RIP) Zero-cost link Distance-vector routing routes packets to closest IPvN router Requires additional discovery-mechanism for IPvN routers to see each other Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  17. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Anycast Routing II Inter-Domain-Routing Option 1: Use anycast Option 2: Use unicast address address Non-aggregatable Aggregatable addresses addrs. Default routes Global routes BGP already knows IP Propagate route in BGP No change in policy Requires change in Use an IP of first IPvN policy provider One additional route Additional traffic for per anycast address first provider Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  18. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary IP Anycast Example Default domain Support IPvN for An D P X Y Q Z Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  19. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Open Problems Problems on our way to IPvN: Client-Side Network Locate IPvN router Topology construction 1 1 Move packets to IPvN Addressing 2 2 router Routing 3 Get IPvN address 3 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  20. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary IP in IP-Tunnel Very easy... Described in RFC 1853 from 1995 Supported by most routers even today IPvN header IP payload IPvN source IPvN dest ... IPv(N-1) header IPvN header IP payload IPv(N-1) source IPv(N-1) dest ... Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  21. Evolvability Introduction vN-Bone Requirements for Evolvability Legacy Apps and Overlays Mechanisms for Evolvability Summary Open Problems Problems on our way to IPvN: Client-Side Network Locate IPvN router Topology construction 1 1 Move packets to IPvN Addressing 2 2 router Routing 3 Get IPvN address 3 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

  22. Evolvability Topology Construction vN-Bone Addressing Legacy Apps and Overlays Routing Summary Deploying Source-Specific Multicast Outline Evolvability 1 Topology Construction Addressing vN-Bone 2 Routing Deploying Legacy Apps and Overlays 3 Source-Specific Multicast Summary 4 Thomas Lohm¨ uller Towards an Evolvable Internet Architecture

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