Research And Implementation On High Availability Of Forces Control Element

The open programmable network architecture based on the Forwarding Element (FE) and Control Element (CE) Separation (ForCES) is an important trend of the next generation network (NGN) element. It is becoming greatly important in the field of information technology (IT) to realize the high availability and flexibility in the network of next generation.By analyzing the ForCES architecture, This thesis studies on the high availability requirements of control element (CE) in detail, and then propose the rules and methods to ensure which data must be backup, and according to these rules and methods, the data used to synchronize with the primary CE by the stand-by CE is specified, including a detail data backup method based on Berkeley DB. At the meantime, this thesis provides the real-time detection mechanism on the basis of heartbeat to verify the present running state of the stand-by CE to test whether it is invalid, and classifies various invalidation state of the primary CE to different fault level; In order to achieve no intermission connectivity between FE and stand-by CE, when the primary CE had a failure, an improved task taking-over method, which is based on IP, is provided after analysis.On the basis of analysis and studies of above-mentioned key techniques in detail, an software architecture is put forwarded to implement the high-availability of ForCES CE, including the detail implementation for each module.Finally, we have tested the high-availability of the ForCES CE which is implemented by this thesis. The result indicates that the resolution of the key techniques is feasible and highly efficient.