Traditionally, each layer of the data plane—IP/MPLS, Optical, etc.—has operated independently, with its own protocols, network creation mechanisms, and separated management. However, the landscape has transformed significantly over the last decade.
The rise of Software-Defined Networking (SDN) has introduced a paradigm shift, separating the data and control planes. At its core, SDN enables a logically centralized software program (SDN controller) to govern the behavior of the entire network, bringing greater efficiency, flexibility, and automation to network operations.
Key industry architectures driving this evolution include:
ONF SDN Architecture for Transport Networks ([ONF16])
IETF Framework for Abstraction and Control of TE Networks (ACTN) ([IETF18-1])
IETF Framework for Service Automation ([IETF21])
In alignment with these frameworks, the Telecom Infra Project (TIP) consolidated SDN architectures into a Three-Tier Hierarchical Model (as illustrated in Figure 41). This model exemplifies the ongoing effort to streamline network control and optimize performance across all layers of the network.
At Project Allegro, we are committed to driving this transformation, leveraging SDN to redefine control plane efficiency and deliver next-generation solutions for the telecom industry.
Let’s continue to innovate and shape the future of network architecture!
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