What is Cisco SD-WAN, how does it function & why should you care?

Cisco SD-WAN is a game-changing new approach to addressing organizations’ networking needs with simplified management and connectivity. In the age of multi-cloud applications, distributed workforces, and virtualization, Cisco SDWAN is invaluable for IT professionals. The post below will run through Cisco SD-WAN, which is another new technology that I have started going over and training on. For those interested in our Cisco SD-WAN Training, we offer. Please see here. We will look into what it is and how it works, as well as what you need for a typical deployment, including template options and some key considerations.

What is Cisco SD-WAN?

Cisco’s SD-WAN (Software Defined WAN) is a cloud-based WAN architecture that helps enterprises to transform and scale their digital and Cloud transformation. While traditional WAN infrastructure entailed huge costs to maintain physical routers and MPLS circuits, Cisco SD-WAN instead programs the path traffic takes using a software-defined approach that supports traffic across various types of links, such as MPLS, broadband internet, or LTE. This provides maximum throughput while supporting 100 Mbps networks and devices such as servers, workstations, network storage, and PCI cards with the same gigabit speed for small branch offices, including VPN services.

With Cisco SD-WAN, this control is centralized, so network operators can quickly deploy and maintain an entire WAN from one easy-to-use interface. This makes it an ideal solution for companies that need to grow and be agile on their network.

How Does Cisco SD-WAN Work?

“SD-WAN leverages the decoupling of data and control plane,” says Cisco’s Miller. Routing decisions and network policies are made at the control plane, while traffic is processed by the data plane. The species has a trimeric architecture, consisting of:

vSmart Controllers — These are responsible for the network and policy distribution, ensuring secure connectivity across all sites within the network.

vEdge/cEdge Routers — Placed at the branch or datacenter and perform packet forwarding and policy enforcement according to vSmart controllers.

vBond Orchestrator –It is the initial level of authentication for devices that want to join an SD-WAN network, ensuring secure communication.

The solution utilizes strong tunnels (IPsec) between the sites and periodically measures the network. g., latency, packet loss, jitter. Based on these measurements, it determines the best path for traffic type (class) in terms of application/service performance and end-user experience.

What You Need for a Cisco SD-WAN?

Setting up Cisco SD-WAN. To set up and deploy Cisco SD-WAN is not typically a small task that can be done on the fly; in fact, it needs to have some of its own dedicated planning and hardware:

SD-WAN Appliances: All locations of the network are equipped with a Cisco vEdge or cEdge router.

Controllers: vSmart controllers (policy) and vBond orchestrators (authentication).

Connectivity: Stable Internet/MPLS/LTE connections between branches.

Management Platform: A single pane of glass for configuration, monitoring, and analytics, like a Cisco vManage.

It’s fulfilling these requirements that allows for secure, efficient, and reliable SD-WAN capable of dynamic traffic routing and centralized administration.

What’s running the Cisco SD-WAN Network?

The vSmart controllers are the main orchestrators of a Cisco SD-WAN network. They are responsible for pushing control policy and control-update messages, along with routing information to all devices connected to the network. Such controllers feature data path protection and optimization to ensure secure high-performance operation. The vBond Orchestrator authenticates devices and sets up secure connections, while the vManage Dashboard enables administrators to manage and monitor the network through a single interface.

Which SD-WAN Protocol is Used?

Cisco SD-WAN is, however, mainly based on the Overlay Management Protocol (OMP). OMP is the routing, security, and policy sharing protocol used by vSmart controllers and edge routers. It also keeps all devices in an SD-WAN network informed about environmental happenings to make smart decisions on forwarding. Secondly, for secure data when communicating on private and public networks combined, SD-WIN uses IPsec to secure the traffic and make sure that unauthorized parties do not have access to sensitive information.

What Ports Does SD-WAN Use?

Ports: The following ports are used for communication among the Cisco SD-WAN components. The key ports include:

UDP 123 — Synchronize time with the Network Time Protocol (NTP)

TCP 443 — Web management interface and API over https

UDP 8472 — overlay encapsulation VXLAN.

UDP 500 & 4500 — IPsec is used here to initiate the tunnel and secure data.

Proper configuration of these ports is critical for the successful, secure, and easy operation of SD-WAN.

How Many Types of SD-WAN Are There?

By deployment and control, there are at most three types of SD-WAN solutions:

Hardware SD-WAN: Routing and control devices live on hardware, best for enterprises that have branches on-site.

Software SD-WAN: Software-defined, it is typically installed on VMs or cloud instances.

Cloud-based SD-WAN: Vendors oversee and deliver the solution, but also limit the on-premises hardware and maintenance required.

Cisco SD-WAN is included within the software-defined, cloud-managed solution offerings that provide businesses with scalability, security, simplicity, and reduced cost.

Summary

Cisco SD-WAN is a game changer for how people think about networking today, allowing customers to efficiently connect users directly to applications across any cloud or on premises. Network engineers can design, deploy, and operate Cisco SD-WAN using the networking concepts in this course. You’ll get to practice building and troubleshooting a multi-site network using our hands-on lab environment. Enrolling in Cisco SD-WAN Training teaches IT professionals how to optimize the WAN, save time and money using advanced automation capabilities, remotely secure all your company’s branches, and provide network visibility. With cloud-based services and remote operations on the rise, knowledge of and ability to manage Cisco’s SD-WAN is no longer a ‘nice-to-have’ but rather should be considered a necessity for any future-thinking network operations professionals.