A service chain high-availability method applied to an SDN network

Abstract

The invention discloses a service chain high-availability method applied to an SDN (software defined network). The service chain high-availability method comprises the following steps of respectivelyconstructing a network service function link for the uplink direction and the downlink direction of each SDN switch in the SDN; constructing a service function path for each network service function link; constructing a determined service function path for each service function path; respectively constructing a service function forwarder graph for all the determined service function paths; according to each service function forwarder graph, respectively calculating an OpenFlow flow table set; creating a service functional path, constructing a service function forwarder graph, and calculating the OpenFlow flow mark set, so that the cross-switch flow traction problem is solved, the flow distribution is carried out among service functions (SF) on the different switches, the problems of single-point faults, load balancing and the like are solved on the two levels of the switches and the service functions, the high availability of a service chain is achieved, and the network communication efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for high availability of a service chain applied to an SDN network. Background technique [0002] The delivery of end-to-end services usually requires a variety of service functions including traditional web service functions (SF) (eg, firewalls and server load balancers, etc.), as well as application-specific functions, such as HTTP application firewalls, etc. [0003] The current deployment model of service functions is usually tightly coupled to network topology and physical resources, resulting in relatively rigid and static deployments, limiting network operators from introducing new or modifying existing service functions. There is also a cascading effect: modifying one or more services in a service chain tends to affect other services in the chain. This problem is particularly acute in network environments that require relatively rapid deployment, d...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the service chain technology, the current applications are basically based on a single SDN switch, and there are risks of single point failure and load balancing of multiple switches.

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