A service data forwarding method based on an SFC and an Overlay system

Abstract

The invention provides a service data forwarding method based on a service function chain and an Overlay network system. The method comprises the following steps: a classifier generates an NSH according to forwarding path information of a service message, packages the NSH in an SFC control message, and forwards the SFC control message in an SFC domain based on the NSH; And the NVE packages the received SFC control message, an NSH is packaged in the VxLAN message, and the VxLAN message is sent to the NVE of the next hop through the VxLAN tunnel. According to the method, the Overlay network system and the SFC service providing method for providing the VDC service under the scene that the NVE node is separated from the SFF, so that the SFC flow forwarding processing does not depend on a network structure and topology, and the dynamic deployment migration of service function nodes of a data center is met; A new processing mechanism is defined for the classifier, the SFF and the NVE, and the SFC service can be correctly forwarded; NSH message processing is added in the SFC service, the implementation is simple, and hardware change is not needed.

Description

technical field [0001] The present invention relates to the technical field of SDN, in particular to a service function chain-based service data forwarding method and an Overlay network system. Background technique [0002] With the development of SDN (Software Defined Network, software-defined network) technology, the data center adopts Overlay technology to separate the virtual network from the physical network, so the SFC (Service Function Chaining, service function) in the VDC (Virtual Data Center, virtual data center) Chain) application deployment has also undergone fundamental changes. Overlay network (overlay network) is oriented to the application layer, and does not consider or rarely consider the problems of the network layer and the physical layer. [0003] Traditional SFC requires manual configuration and is tightly coupled with the network topology. For example, firewalls / load balancers are deployed at the control layer according to the forwarding path and netw...

AI Technical Summary

Problems solved by technology

Driven by SDN / NFV (Network Function Virtualization, network function virtualization) technology, cloud resource pools gradually use virtualization technology, which has the characteristics of high fluidity, easy change, and multi-tenancy. The traditional service chain deployment method cannot meet the demand

The VxLAN control plane is separated from the SFC domain. Service traffic cannot be correctly forwarded according to the SFC path. There is a problem of SFC domain and VxLAN forwarding coordination.

In the scenario where the NVE (network edge device) node and SFF in the Overlay network are separated, the NVE cannot select the corresponding tunnel forwarding according to the SFPID, and cannot realize dynamic business processing

Images