The Internet has been gradually evolving since its inception. In this paper, we highlight the crucial factors that have driven this evolution, and describe how the Internet is nevertheless still struggling with several critical issues that need to be solved to meet predicted requirements of future applications. We discuss possible approaches, solutions, and open issues, bearing in mind the considerable inertia of the Internet's key architectural features.
Intent-based networking provides an efficient mechanism to manage complexity in network management. The paradigm allows users to express their network requirements, and an autonomic framework translates them into a network configuration. Existing efforts focus primarily on modeling connectivity intents for end-users. Nonetheless, in order to deliver autonomic behavior in network management, an intent system must support a wider range of network management processes and model human-to-human interactions, essential for network operation. Furthermore, such interactions may involve nontechnical users and require the design of novel interfaces, supporting free-text and conversational intent expression. Towards this goal, we present an intent architecture that supports novel network management intents, such as network path rerouting and applying periods of 'service protection'. The paper includes details of our prototype implementation that is capable of deploying such intents in under five seconds in a large mininet topology.
We propose an intent-based system where, on top of the user intentions, the system itself generates suitable Quality of Service and resilience parameters and may augment the intent characteristics if it detects any room for improvement. We demonstrate the feasibility and challenges of such a system using mininet and the ONOS controller.
The Intent-Based Northbound Interface (NBI) offers users the ability to express what they want to achieve instead of how to achieve it, enabling improvements to network management and reducing operational costs. However, development of an Intent-Based NBI remains in its infancy. Existing solutions do not allow users to express high-level operational targets that appropriately capture business objectives, nor link these to lower-level management policies and operations. We propose an extensible Intent-based NBI framework and a higher-level declarative intent expression to enable service-oriented intents with different targets. We focus on the creation of intents and their mapping from high-level expressions to low-level policies, and consider this from the perspective of an intent developer in the context of a Cloud CDN use case.
International audienceBy nature, links in multi-hop wireless networks have an unpredictable behavior, which directly affects the stability of routes. In this paper, we investigate the stability of the network by addressing some interesting questions related to the presence of both dominant and sub-dominant routes between nodes, in a real deployment. We focus on the persistence of the dominant route and the first four sub-dominant routes. The persistence is computed as the percentage of time that a given route is used. We note that source-destination pairs mostly use the dominant route and two sub-dominant routes to communicate, but with a low persistence. We also investigate the number of hops crossed by these routes and their impact on the stability. It turns out that the larger the number of hops, the larger the number of sub-dominant routes. However, when exceeding four hops, the notion of dominance fades
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