Traffic Redirection with Sandvine Divert
Value-Added Services and Service Function Chains
There are two practical options available to a communications service provider (CSP) for deploying value-added services (VAS): integration/embedding within a PCEF, and redirecting from a PCEF to physical or virtual service nodes. Using the 12 problem areas for service function chaining identified by the IETF’s Internet Working Group as a basis of comparison, the external redirection model is determined to be the superior approach.
Sandvine Divert is a patented technology that enables intelligent management of multiple service functions in a communications network.
Divert allows the Sandvine Policy Traffic Switch (PTS), our PCEF/TDF, to redirect traffic flows on an application-aware, subscriber-aware, and/or content/MIME-type-aware basis to physical or virtual third-party systems for further processing. The service nodes then return the processed traffic back to the PTS for reinsertion onto the wire.
Divert places each service function logically inline on a per-flow basis after a connection is established and the application and/or content type is known. This feature, combined with the Sandvine’s traffic classification technology, gives Divert the maximum theoretically achievable efficiency for traffic redirection, far beyond rudimentary port-based redirection and heuristic guessing.
Sandvine traffic redirection with Divert is a proven solution, having enabled more than 40 VAS and service function chain deployments worldwide through our Solutions Partner Ecosystem, a collaboration of partners and pre-integrated joint solutions. With Sandvine already in the network, CSPs can simply plug-and-play our ecosystem partners’ offerings to get an end-to-end solution.