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Three Basic Technology Architectures of SD-WAN

The SD-WAN market is very hot. In recent years, SD-WAN has made great progress in branches such as finance and retail business. For enterprise users who deploy SD-WAN, sd wan managed services can save some costs for enterprise networking and optimize operations. If an enterprise is considering bringing SD-WAN technology to the WAN, the first thing to understand is the pros and cons of different SD-WAN architectures, such as sd wan in manufacturing and sd wan for small business.


Ⅰ. The first type of architecture: On-Prem-Overlay


This is the most basic SD-WAN architecture, the typical architecture of the initial SD-WAN, suitable for small and medium-sized small-scale rapid networking.


Brief introduction of this architecture: whether it is a traditional hardware manufacturer, a VPN manufacturer or a new SD-WAN company, design a set of SD-WAN controllers, deploy them in the cloud or headquarters, and centrally manage the CPE equipment of the branch and network based on the Internet:


1. Deploy SD-WAN CPEs in local branches, deploy SD-WAN appliance controllers in the cloud, interconnect with CPEs in each branch, and use Internet and VPN technology to achieve secure connections between CPEs. (The underlying technology is useful GRE+IPSEC, VLXAN, etc.)


2. Satisfy the flexible deployment and networking of enterprise branches based on the Internet.


3. Realize SDN control and unified strategy, ZT-PNP automatic deployment, plug and play.


4. The networking mode recommends Hub-Spoke or small-scale Full-Mesh.


Ⅱ. The second type of architecture: On-POP-Overlay architecture


This is the favorite SD-WAN architecture of cloud providers and service providers, and it is also the recommended architecture for large-scale branch deployment of SD-WAN.


Briefly introduce this architecture: This architecture uses the cloud or operator's POP nodes to terminate the CPE. When designing and deploying, it will choose to deploy multi-line POP nodes in multiple computer rooms in various places. Branches need to detect and select the best POP first. node and establish a connection. Deploy vPE or gateway devices in POPs, establish VPN tunnels between CPEs and POP nodes, solve cross-operator interoperability at the POP layer to improve interconnection quality, and build a private line backbone network between POPs to ensure the quality of SD-WAN appliances for remote transmission services.


Ⅲ. The third type of architecture: Integrated SD-WAN architecture


This is the favorite SD-WAN architecture of MPLS service providers, and it is also the hybrid networking architecture that many customers need in practice.


Briefly introduce this architecture: the vPE or GW of each POP node is directly connected to the operator's MPLS network PE, and is connected through OptionA or other methods, and forwards the traffic aggregated by SD-WAN to the operator's MPLS backbone network to guarantee SLA.


In this architecture, operators can integrate MPLS VPN PEs and tenant VPNs into the SD-WAN system to truly provide customers with nationwide WAN solutions that integrate MPLS VPN, IPSEC VPN, SD-WAN and other applications.


Some countries refer to this capability as a "hybrid architecture" capability. This architecture can effectively improve network performance and hybrid networking capabilities, especially real-time traffic with various high service levels, and can facilitate the connection between the backbone network and major cloud operators.


The above mentioned several SD-WAN technical architectures are more different from the functional realization and expansion capabilities. It does not mean that the architecture is necessarily better than the other (everyone can have their own technical schools and pursuits), and customers in different scenarios have different choices. At GoSDWAN, we are committed to solving our customers' toughest challenges with solutions such as edge computing, cloud direct connectivity, and SDN expert services to meet their changing business needs. Welcome to consult.

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