Distributed service function forwarding system
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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Abstract
Provided is a distributed service function (SF) forwarding system that applies the corresponding service function chain (SFC) to traffic classified by a plurality of service network (SN) controller instances based on an SN overlay structure. Therefore, by selectively combining and executing necessary network functions (SFs) according to a path and traffic made up of defined component services, it is possible to dynamically configure and control one network service.
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Citations
9 Claims
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1. A distributed service function (SF) forwarding system comprising:
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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, and wherein 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification