Wide Area Network : WAN
Software Defined WANs and WAN Innovations
The network that covers a broad area and generally using leased telecommunication lines is called WAN or Wide Area Network. WAN is used by business and government entities to relay data among clients, employees, suppliers and buyers from different geographical locations. This mode allows a business to effectively carry out its daily function regardless of where it is located. The internet is also considered a WAN. WAN networks span countries, regions, and even the world.
Software Defined WAN
It is costly and complex to manage enterprise WANs, but SD WAN can help by automating the configuration of WAN edge routers. In the world of software-defined networking data centers play a crucial part. SD networking allows enterprises to build virtual networks by integrating service chaining and providing micro-segmentation. Being able to perform all these functions demonstrates SD networking.
An IT data center is not the only one which can use software defined WAN. Enterprise WANs are definitely complex and are sources of cost. Using MPLS network of the provider, it is possible to stitch together remote offices and make it highly functional using L3 or L2 connectivity options and with quality and privacy guaranteed. Broadband lacks the high functionality of providers MPLS cloud, and this is where software-defined WAN plays a big role.
Software defined WAN Improves everything
.Organizations will be able to use broadband connectivity for interoffice network traffic. They also direct quality-sensitive and mission-critical traffic over private MPLS links. Using technologies like Cisco Performance Routing (PfR), real-time quality measurements, and Dynamic Multipoint VPN, it is possible to configure routers do hybrid WAN.
Benefits of using SD-WAN products
SD-WAN addresses these challenges by running traffic over a hybrid of public broadband, by automating the configuration of WAN routers, other WAN links such as LTE, and private MPLS links. The result of which would be an enterprise network edge with following attributes:
It is a challenge to configure a hybrid WAN by hand. Routing protocols are helpful here. They choose the single best path to get between two sides. Another advantage of using routing protocols is that they don’t react to the changing network circumstances such as congested links, excessive jitters, and packet loss. SD-WAN handles this work for an organization routing and rerouting traffic based on the current network state in an automated way. How certain traffic should be treated is controlled by the IT team using WAN application and the solution takes care of the rest. SD-WAN application hides all the complexity by doing all the heavy lifting itself.
Another benefit of using SD-WAN is that it helps lower the cost for organizations. With software defined WAN the enterprise should be able to depend on cheaper broadband links than on expensive private links. Broadband links don’t provide guaranteed quality that is where SD-WAN comes in and takes active measurements between endpoints to know if broadband is able to carry say video or voice traffic reliably. It is possible to run both voice and video over the internet like in Skype. On occasions where you shunt traffic over private link and when broadband quality is inferior, SD-WAN can handle those occasions with guaranteed quality.
Flexibility is Increased with SD-WAN
Hybrid WAN reacts automatically to changing network conditions with the use of SD-WAN technology which means WAN is flexible in a way it was never before. In addition to flexibility, an organization gains both budget, with reduced expenses for WAN infrastructure, and time for its IT staff. The RIO calculations could reveal that SD_WAN purchase could pay for itself or even save money