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Distributed service function forwarding system

  • US 10,063,482 B2
  • Filed: 08/10/2016
  • Issued: 08/28/2018
  • Est. Priority Date: 06/07/2016
  • Status: Active Grant
First Claim
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1. A distributed service function (SF) forwarding system comprising:

  • a network controller configured with service network (SN) controller instances configured to control SNs of a network overlay structure in units of service function chains (SFCs) obtained by abstracting network functions necessary for a service and application sequences of the network functions, and generate service graphs which are service function paths (SFPs); and

    a software defined network (SDN) infrastructure controller including an SFC handling classifier function of mapping an SN capable of generating a service graph of an SFC requested for generated traffic to an SN controller instance to resolve a traffic bottleneck caused according to a location of an SFC classifier on which data traffic is concentrated and a number of instances,wherein when there is an SN appropriate for an SFC requested by traffic or a new SN is configured, the SDN infrastructure controller includes SFC-identification (ID) tag information in a request for an SFP of the traffic and transmits the request to an SN controller instance controlling a corresponding SN, andwherein when an amount of traffic generated in the SN exceeds a requested amount of network resources, the SN controller instance distributes a generated traffic load by resetting multiple SFPs for the SFC according to a multipath forwarding method based on minimum costs dependent on currently available network resources.

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