Some sites are with Meraki solution that land on Meraki concetrator at HQ some sites are on Cisco Viptela or any SDWAN with Internet & MPLS as underlay with one edge device at HQ. Requirement is to deploy a Meraki Access point at one of site where Viptela is deployed. Is this a feasible solution? Any challenges with tunneled SSID to MX @ HQ.
Can Meraki Wireless establishes overlay with Viptela or other SD WAN as underlay to MX at HQ.
Typically the tunelling is done over the Internet - but at the end of the day it is just IP packets. So as long as the APs can communicate with the MZ concentrator it should work ok.
The mian gotcha will be to make the APs and the MX both present themselves to the Internet using the same public IP when they talk to the Meraki cloud so that the cloud knows they are both on the same private network.
Check out this guide about using AutoVPN over MPLS. Except your remote devices are APs rather than MX's. Same rules apply.