Abstracting the Network Resources Sample Clauses

Abstracting the Network Resources. The role of the orchestrator in the datacentre is to coordinate the underlying resources (e.g. compute, network, etc.), out of which the network resources represent a significant part. The physical network resources can be presented to the orchestrator as a pool of abstracted resources (e.g. network, switch, port, tunnel, etc.). In this respect, the orchestrator application operates with the software abstractions available in this pool of resources. These abstractions ensure that the orchestration layer is not tightly coupled with the underlying DCN. Moreover, the abstraction of network resources creates a unified view of the underlying heterogeneous network technologies (L0 - L4) across the DC. The data models denoting the abstractions of network resources can be described using the Unified Modeling Language (UML). Figure 2 shows an example of an UML diagram of a data model that denotes an abstraction of a network resource. These data models may be uniformly represented through hierarchies of software objects (i.e. three-like structures), which can be implemented in several programming languages. In this context, each node (i.e. data/software object) in the hierarchy would denote a virtual (abstracted) resource (e.g. tunnel, switch, etc.), which may be mapped to a set of other virtual resources (children nodes), or to a physical resource (e.g. optical device). The operations that the orchestrator performs on the abstract network resources would be applied to a set of nodes (data objects) in the hierarchy. These operations might be further translated into commands that are transmitted to devices in the physical network. For example, an operation for setting up a tunnel means that several objects (e.g. switches) in the hierarchy of abstractions will change their state accordingly. Furthermore, a set of commands may be sent to the corresponding physical devices, so that the configuration is reflected in the physical network.
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Related to Abstracting the Network Resources

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