https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/SDWAN/SD-WAN-End-to-End-Deployment-Guide.pdf
https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/SDWAN/CVD-SD-WAN-Design-2018OCT.pdf
https://pocvlab.com/cisco-sd-wan-controllers-onboarding/
https://gblogs.cisco.com/ch-de/2019/06/25/viptela-sd-wan-vs-meraki-sd-wan/
https://ipsla.blogspot.com/2019/06/adicionando-viptela-no-eve-ng-community.html
https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2019/pdf/LTRCRS-2015.pdf