Learning SD-WAN with Cisco: Transform Your Existing WAN Into a Cost-effective Network

© Stuart Fordham 2021

S. FordhamLearning SD-WAN with Cisco https://doi.org/10.1007/978-1-4842-7347-0_4

4. Understanding the Overlay

Stuart Fordham¹  

(1)

Bedfordshire, UK

 

During our setup of the vManage server(s), we created two VPN connections, VPN 0 and VPN 512. These have different purposes; we use VPN 512 for out-of-band management, whereas VPN 0 is our transport VPN, but can also be used for management purposes.

In this chapter, we are going to look at these two VPNs in greater detail and the OMP routing protocol, which forms the overlay network used by the SD-WAN, as well as BFD and NETCONF (Network Configuration Protocol).

VPN 512

This management VPN is enabled by default on all Viptela devices, but will be unconfigured, such as here on the vSmart ...