Policy interoperability and network autonomics
Autonomic behaviours in network operations will alleviatemuch of the labour intensive and error prone interventions of today'scomplex networks. The Service Provider must, be able to manage theinfrastructure and services at an abstract level, focusing on what thedesired behaviour should be rather than how it might be specificallyachieved. Policy-Based Network Management (PBNM) appears as oneof the leading mechanismsto describe desired behaviours and abstractthe programmability of an autonomic network infrastructure to the ServiceProvider. For massive-scale and complex networks, the current understandingof the Higher Level to Lower Level (HL-LL) refinementprocess commonly used in PBNM today is not completely effective.Oneproblem encountered is the need to provide u bind mechanism betweenHigher Level and Lower Level policy specifications such that cross-layerpolicy requests in the policy continuum can be made by lower policy layersin a dynamic policy refinement cycle (LL-HL--LL).In this paper,we illustrate the problem with a policy-based simple admission control(SAC) application. We then show that policy specifications with a joinoperator (ec) simplify the SAC specification. We also investigate theperformance considerations of this enhancement in Internet size applications.Our future goal is to provide a policy inference engine that cansupport complex specifications appropriate for PUNM systems that supportautonomic behaviours in large networks,made of Network elementswith realistic memory and processing constraints.
Year of publication: |
2005
|
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Authors: | Braun Robin ; Magrath Shane ; Cuervo Fernando |
Publisher: |
Springer-Verlag |
Saved in:
freely available
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