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Policy Distribution
After a policy has been initially created or an existing policy has been modified, the Policy Distribution Framework sends the policy from the repository to its points of use, before it is actually needed. This distribution is precisely targeted so that each distributed policy-enabled function automatically receives only the specific policies that match its needs and scope.
Notifications Separate notifications or events communicate links/URLs for policies the link or URL for a policy to the components that need them, so that components can utilize those links to fetch particular policies or groups of policies as neededit. Then, when a component needs the policy, it uses the link to fetch it. Components in some cases may might also publish events indicating that they need new policies, eliciting a response with updated links /or URLs. Also, in some cases, policies can be given indicate to components indicating that they should subscribe to one or more policies, so that they receive automatic updates to those policies automatically as they become available.
Policy Decision and Enforcement
Runtime policy decision and enforcement functionality is a distributed system that can apply to the various ECOMP modules in most cases (there could be some exceptions). For example, Policy rules for data collection and their frequency are enforced by DCAE data collection functionality. Analytic policy rules, anomalous / abnormal condition identification, and publication of events signaling detection of such conditions are enforced by DCAE Analytic applications. Policy rules for associated remedial or other action (e.g., further diagnosis) are enforced by the right actor/participant in a control loop (MSO, Controller, DCAE, etc.).
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