SAP ERP systems run at the core of numerous enterprises around the world. The SAP business software supports critical business functions such as manufacturing, logistics, finance, sales and supply chain, which means availability, performance and scalability are essential. If you are planning to migrate your mission critical ERP system to SAP S/4HANA – or use SAP’s Cloud Platform to extend your existing environment – you have to critically evaluate if your existing WAN infrastructure can seamlessly support your new SAP cloud environment.
MPLS based networks are designed for connections between a single datacenter and a number of remote locations. However in today’s cloud world, all applications must be provided ‘from anywhere, to anywhere’. In this article we describe the 3 most common WAN options you have when moving to the cloud, including their pros and cons.
Option 1: Backhaul all sites, connect only datacenter firewalls to HEC
In the most simple scenario, you can keep backhaul traffic to the datacenter and establish a connection from the datacenter to the cloud provider. In many cases this approach will add latency which potentially impacts system performance and user experience, as well as unnecessary WAN transport costs.
Option 2: a full site-to-site mesh using firewalls
Ideally, traffic from each site will go directly to the cloud provider instead of to the datacenter. However, direct firewall-based site-to-cloud connectivity is no longer supported by SAP H/4HANA as customers only have 2 IPSEC tunnels to connect to. An intermediate firewall has to be deployed in the datacenter, and connected to the SAP cloud provider. This new firewall is a mission critical element for the enterprise, as it will become the global chokepoint for accessing the cloud.
Option 3: a redundant, full site-to-site mesh using a cloud network
In this scenario, all sites and cloud provider(s) connect to a cloud-based network using IPSEC tunnels, and a full mesh is achieved in the cloud. Backhaul and congestion are eliminated as the cloud network provides built in resiliency and optimal, low latency routing and secure connectivity between all sites and SAP in the cloud. As an added benefit, mobile users will be able to connect to the cloud network from anywhere around the world and directly access SAP in the cloud, without the added latency of going through the datacenter firewalls.
Is your WAN ready for SAP in the cloud?
Does your WAN give you full flexibility to shape your global network any which way your organization needs? If you are considering migrating to SAP in the cloud, please contact us to discuss how we can help you speed up cloud adoption and performance through a next gen cloud based SD-WAN solution.