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104 Deploying and Managing IP over WDM Networks 6.4.2.1 Policy Provision Figure 6.4 depicts the policy provision UCs considered in WINMAN. WINMAN operator (from actors) • Provide policies UC. The purpose of providing policies at the summary level is to allow the WINMAN operator to add/modify/execute/delete a policy in/from the WINMAN system. • Provide policy report UC. This UC at the user level creates reports regarding the policies that exist in the system. The nature of the reports is generic, ranging from simple statistics to presentation of more complex policy-related data at summary level. • Add policies and remove policies UCs. The purpose of these UCs at the user level is to install a new policy in the WINMAN system, leaving it ready to be activated, or to remove it from the repository, respectively. • Modify policies UC. The WINMAN operator modifies an existing policy, at user level. Provide policies Schedule task (from “included” use cases) Figure 6.4 Policy provision UCs. Add policies (from “included” use cases) Modify policies (from “included” use cases) Remove policy (from “included” use cases) Activate policies (from “included” use cases) Provide policies report (from “included” use cases) Execute policy (from “included” use cases) Check policy (from “included” use cases) Find policy (from “included” use cases)
The WINMAN Management System Concept 105 • Activate policies UC. The purpose of activating policies at the user level is to instantiate a certain set of policies in the appropriate system components, leaving it ready to be used by the execute policies UC. • Execute policies UC. The purpose of execute policies at the user level is to carry out actions according to an instantiated policy. The policy conditions are checked and the relevant actions are executed. This UC may be called from any of the NP, NIM, NM&R, and NDM UCs. • Check policy UC. The check policy at the atomic level is intended to determine both the policy validity in itself and whether it is in conflict with all other existing policies. The principal mechanisms driving this check will be dictated by rules specifically designed for such a purpose. These rules are called metapolicies. • Find policy UC. The purpose of this UC at atomic level is to find a given policy in the repository. 6.4.2.2 Scheduling The scheduler is a part of functionality in the WINMAN system to perform a variety of tasks on such areas as (but not limited to): • Connection management (implementing/activating a network connection); • Configuration management (periodically making changes in the network); • Fault management (providing fault management summary reports once or on a certain time base, or changing correlation rules); • Performance management (providing time-based reports or changing thresholds); • System administration (performing backups); • Policy management (executing policies). The scheduler keeps a list of tasks to be scheduled. These tasks are in principle performed in a chronological fashion but also take into account the task priority. However, policies that apply to the scheduler can override the execution order. The task to be scheduled can have a fixed date and time but can also have a periodical schedule. The task owner is entitled to request the scheduling of a task. Two possible owners are distinguished; a task is owned either by the WINMAN operator or by the connection management UCs (provide ICS/delete ICS/modify ICS). • Schedule task UC. A task is added to the task list of the scheduler.
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Contents Foreword xv Preface xix Ac
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Contents vii 4.2 The WDM Network El
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Contents ix 8 Management System Des
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Contents xi 10.3 The WINMAN Testbed
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Contents xiii 13.4.1 Adoption of Op
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xvi Deploying and Managing IP over
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Preface The integration of the Inte
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Coauthors of the IST-OPTIMIST proje
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1 Introduction 1.1 The Importance o
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communications. These legacy networ
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Within these programs, consortia of
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8 Deploying and Managing IP over WD
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Management System Design and Implem
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11 Evaluation of IP over WDM Manage
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Evaluation of IP over WDM Managemen
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system will still perform without i
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11.5.3.1 General Remarks The manage
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12 Integration of IP over WDM: The
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domains with different management t
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Integration of IP over WDM: The LIO
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ClientCTP Integration of IP over WD
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AstnTrail AstnTTP NL resource Integ
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At least two other possible solutio
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13 Future Developments and Challeng
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Future Developments and Challenges
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About the Editors Joan Serrat recei
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