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Cisco SD- WAN (1)
By JOE MAILLET 196 views

What is the Cisco CCIE Enterprise Infrastructure SD-WAN?

The primary architecture of the CCIE Enterprise Infrastructure Practice Labs combines classic IOS/IOS-XE routed and switched technology with Software Defined Access (SDA) and Software Defined WAN (SD-WAN) solutions. All practice laboratories have the same topology, which is always complete and includes all the equipment. However, the initial setting of each gadget may vary depending on the practice lab. SPOTO helps to prepare for the CISCO exams.

What is CCIE Enterprise Infrastructure Certification?

The Cisco CCIE Business Infrastructure Certification Program is a particular certification program that attests to your proficiency with sophisticated enterprise infrastructure solutions. The new CCIE Enterprise Infrastructure v1.0 certification program, which is set to replace the current CCIE Routing and Switching v5.0 certification, trains you for today’s expert-level employment responsibilities in enterprise infrastructure technologies. Thus, useful materials about CCIE Enterprise Infrastructure help to prepare well for the upcoming CISCO exams.

To help you grow your corporate infrastructure, it provides automation and programmability. You must pass two tests to obtain the most esteemed credential in this field, the CCIE Enterprise Infrastructure Certification, which may establish you as a technical leader.

  • A test for certification covers the fundamentals of enterprise infrastructure.
  • CCIE enterprise infrastructure v1.0 is a hands-on lab test that examines business networks throughout the whole network lifecycle, from planning and implementing to running and optimising.

What is SD-WAN?

The simplest definition of software-defined WAN is a method for centralising control over WAN devices to make the administration of these devices easy. Kind of response, but let’s look at the issues it is attempting to address first.

Current WAN systems frequently experience the following issues:

  • WAN transport might not be accessible everywhere.
  • Inadequate application performance on several modes of transport.
  • SLAs for transportation can also vary or be nonexistent.
  • Management and operation can be challenging.
  • It might be challenging to hold the edge.
  • Certain transfers disregard QoS markings.
  • Edge Independent routing decisions get made by routers.

There have historically been several approaches to try to address these issues. These include DMVPN, IPsec site-to-site tunnels, MPLS L3VPN/L2VPN, and more. Each choice has advantages and disadvantages of its own and addresses a specific issue. You frequently wind up building your network utilising several different options. For instance, your company may use site-to-site tunnels, DMVPN, and MPLS L3VPN as needed. It becomes difficult to configure and maintain this.

All these problems get addressed by SD-WAN by constructing a fabric with an SD-WAN overlay where the underlay is irrelevant. It implies that the overlay functions as it is – whether a location uses MPLS, DIA, 4G, cable, etc. Additionally, it permits a central control plane and administration system.

When you examine the solution, you’ll see that SD-WAN and other existing solutions have many characteristics. Numerous things that resemble MPLS L3VPN and BGP will be familiar to you. Additionally, you’ll see that Cisco’s approach has a lot in common with Front Door VRFs and DMVPN.

Overlay Management Protocol (OMP)

OMP is a proprietary control plane protocol used by Cisco SD-WAN. It is a TCP-based extensible protocol that SD-WAN utilises to advertise routes and rules, making it comparable to BGP. OMP permits a complete mesh topology, but we may override that behaviour with regulations. OMP is much more than that, but that deserves its essay. This article is only an overview.

Principles of Cisco SD-WAN

The fundamental tenets used by Cisco’s Software-defined Wide-Area Network (SD-WAN) architecture address the shortcomings of the conventional WAN. The solution combines well-known and established network technology with fresh, creative concepts. It turns the intricate, outdated WAN architecture into a safe, expandable overlay fabric. It gets accomplished by Cisco SD-WAN utilising the following methods:

  • Dividing the network’s service side from its transport side
  • Separate the management, data, and control planes
  • Automatic Data-Plane Security
  • Centralising the policies used for fabric management
  • Secure zero-touch device provisioning and onboarding

Separating the network’s service side from its transport side

The division of the network’s service and transport sides is the first fundamental method used in Cisco SD-WAN.

The cost and complexity of managing a wide-area network rise as a business using a standard WAN architecture expand. One of the primary causes is the lack of a distinct distinction between the devices used by users, applications, switches, and routers on the network’s service side and those used by WAN links and service providers on the transport side.

Therefore, it is challenging to influence WAN routing decisions without harming the services getting run on top since the transport routers need to be aware of the non-transport prefixes. The MPLS cloud is just a transport network that doesn’t need to be careful of any client prefixes, according to the tried-and-true idea used by all service providers’ networks, and this is how Cisco SD-WAN operates. The MPLS network’s sole purpose is to move packets from a transport cloud’s entrance spot to the exit point. Cisco SD-WAN divides the network’s transport side into a distinct transport segment called VPN0.

The wide-area network (WAN) is abstracted away from the applications operating on top by separating the transport from the service side of the network. This strategy provides a lot of advantages, including:

Independent of the communication between users or programs, network administrators can affect the routing choices into the vast area network.

Joe Maillet

Joe Maillet is an avid reader and a writer by heart. He is an author, freelance writer and a contributor writer, who write articles and blogs for various leading online media publications and for CEO and entrepreneurs from across the world. He keeps himself updated with the latest marketing trends and always recognized in the industry for providing solutions to B2B and B2C businesses.