Virtualization scene flow migration method based on network function and system thereof
A network function virtualization and flow migration technology, which is applied in the field of flow migration methods and systems based on network function virtualization scenarios, can solve the problem of reducing controller cache pressure, inconsistency of flow state and function, and not responding to target network functions, etc. problem, to achieve the effect of no packet loss flow migration operation and no out-of-order flow migration operation
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[0046] In order to solve the problems of state inconsistency, low migration efficiency, controller bottleneck, and network function extra overhead that exist during load migration in NFV in the prior art, the present invention designs and implements a flow migration system based on a distributed architecture (Transparent Flow Migration, TFM), such as diagram 2-1 As shown, each migration unit (TFM Box, Figure 2-2 ) Based on a state machine triggered by multiple events ( Figure 2-3 ) Judge the migration status, and generate data packet processing rules to realize the distributed collaborative classification and processing of data packets and complete the migration of data packets. In addition, the state machine of the migration unit can support the arrival of various events out of order (asynchronous processing mechanism) , So as to decouple the two operations of state migration and data packet migration; the TFM controller provides a northbound migration interface to the applic...
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