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The authors consider an interconnected network environment where one network can act as a 'Provider' or 'Service' network to the 'User' network or a collection of 'User' networks. In such an environment, a major failure in a provider network can affect the user networks. Very often, failure management is addressed in each individual network domain independently. In this paper, they present an overview of a loosely-coupled network management framework through the development of a multi-layered network manager of managers' concept for correlated management, for failure cases that can not be addressed by each component network individually.
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