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ANTS Goals

ANTS Goals. Today’s networks lack flexibility … Active networks are an appealing solution, but no convincing demonstration that they can work …. Seek to allow new network services to be introduced rapidly.

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ANTS Goals

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  1. ANTS Goals • Today’s networks lack flexibility … • Active networks are an appealing solution, but no convincing demonstration that they can work … Seek to allow new network services to be introduced rapidly. Evaluate the hypothesis that they can provide useful flexibility at a reasonable security/performance cost. djw

  2. ANTS Architecture • Approach • uncoordinated introduction, automatic deployment • application-specific protocols used “on-the-fly” • Model • programmable routers generalize IP forwarding • mobile code used to implement new services • Goal • show feasibility/usefulness, explore tradeoffs djw

  3. ANTS Glossary • Node • programmable router that implements services • Capsule • generalized packet (header + data + program) • different capsule types have different programs • Protocol • communication rules that provide a service • codified as set of related capsule types • Application • network client that uses services via protocols djw

  4. Capsules are Generalized Packets • carry the program and protocol by reference using a fingerprint to prevent code spoofing • header includes at least fields for default forwarding, resource limits and source identification Protocol+Program Id Header Data Node Node Capsule djw

  5. Node Operating System • hosts user-defined protocols • capsule API: soft-storage, routing, … • admits new protocols at its discretion • protects network/protocol integrity • executes untrusted code, limits resource use • provides each protocol with its network “view” • distributes code among nodes djw

  6. Code is Loaded at Routers • application provides code at end systems, while node loading is triggered by capsules need to be efficient, adaptive, and load-limited previous node loading node load request time load response djw

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