Dontfragment.com Website Review

Wanted to share some of my thoughts on the topic in simple words and being a bit more technical than the average on the internet. Basically SD-WAN is a new way to build enterprise WAN infrastructure by employing some of the principles coming from SDN. Each SD-WAN vendor has its own view but what all the solutions have in common is Besides branch devices (appliances or virtual machines) that plays the role similar to that of a customer-edge router typical SD-WAN solution has a Controller that ties together all the branches, some peace of software that manages configurations for both controller and branches Central components may be composed in a different manner, for example Controller may also do the configuration management, or configuration management software do the monitoring as well but the functional blocks remain the same. Controller and branch devices form an overlay network and provide at least hub-and-spoke connectivity for the whole enterprise. In most cases direct spoke-spoke tunneling is also possible which is important if you have significant VoIP and Videoconferencing traffic between branches. This is something similar to Cisco DMVPN. What most SD-WAN vendors try to add to this is multipath over redundant underlay In a traditional WAN architecture it was common to use some expensive WAN-circuit with guaranteed SLA as primary and then have some backup possibly over the Internet. SD-WAN solutions give you an opportunity to use primary and backup circuits in an active-active manner. They normally have some built-in mechanisms that monitor quality of each link and are able to distribute traffic between links dynamically as these links degrade and recover. In some solutions you can define SLA levels for each type of traffic you have, defining it by application given moment at the same time make sure not to use expensive bandwidth for non-sensitive traffic. In some cases this may mean that customer may cease to use MPLS circuits and move to 2 or 3 good internet connections from different service providers. The latter won’t have