VeloCloud Enhanced High Availability

Hi,

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I was going through VeloCloud Admin Guide. I have certain doubts to clarify to understand the two HA options.

According to VeloCloud, If the active edge detects a different WAN connection on the standby edge it enters into "enhanced HA mode" and it leverages the HA failover link to establish an overlay tunnel over it. Else if the WAN links are mirrored on both edges it operates in "standard HA mode". 

My question is that for standard HA mode, you don't need to configure anything on the standby edge device. We will only configure the active device enable the HA and connect both edges via LAN1/GE1 port.

But for enhanced HA, since we will be connecting a different WAN link on standby device, do we need to configure static IP address (initial configuration) on standby device and then enable HA on active device?

Can enhanced HA achieved in MPLS only network?

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The network diagram that I have shared is for MPLS only branch site.

https://content.spiceworksstatic.com/service.community/p/post_images/attached_image/4bb5ef9a-0252-422d-8f30-989ab23c18da-VeloCloud-eHA.png

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Thank you