Implementing ospf in a split architecture network

Abstract

A method is implemented in a network element functioning as one of a plurality of controllers for one of a plurality of regions of a split architecture network. The controller provides the control plane for regions of the split-architecture network, where the controller is remote from the plurality of switches that provide the data plane for regions of the split-architecture network. The controller facilitates optimal routing across multiple areas of the split-architecture network by providing link cost data within the limited area to other controllers in other areas of the split-architecture network, as well as to traditional routers of networks including the split-architecture network . Link cost data within a limited area provides the cost of each possible shortest path traversal of the controller's area without providing all internal link cost data.

Description

technical field [0001] Embodiments of the invention relate to path finding or routing in split-architecture networks. In particular, embodiments of the invention relate to methods and systems for implementing the Open Shortest Path First procedure for routing data in networks including split-architecture networks and traditional routers. Background technique [0002] A split architecture network design introduces a separation between the control and forwarding components of the network (also referred to as the control plane and the forwarding or data plane). Split-architecture networks can be used in the access / aggregation domain of carrier-grade networks, mobile backhaul, cloud computing, and multi-layer (L3 and L2 and L1, Optical Transport Network (OTN), Wavelength Division Multiplexing (WDM)) support, It's all in the building blocks of the network architecture. [0003] Unlike traditional network architectures, which combine forwarding (data) and control planes in the s...

AI Technical Summary

Problems solved by technology

The close integration of forwarding and control planes in traditional network architectures usually leads to extremely complex control planes and complex network management

This makes the creation of new connected devices expensive and creates a significant barrier to entry for new protocols and technologies potentially deployed in these devices

Despite rapid improvements in line speed, port density, and performance, the network control plane mechanisms used to manage these characteristics have evolved at a much slower pace

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