In having a hard time finding the right solution in this scenario. I want to be able to failover Site 2 and be able to keep all my services like adfs running.
Can you explain a bit further?
If I am understanding your right you have 2 remote sites and 2 Main sites.
You want to have it setup so that if Site 1 goes down the remote sites will all begin pointing to site 2 for all adfs? and what part of site 1 goes down all of it or just internet?
Agreed some additional details would be useful. What scenario are you wanting to protect against?
Is the 20G link a layer 2 link trunking all the VLANs, or is it a routed link between the sites?
Do the MX84's exist at the moment, and do the VLANs hang off them - or is this what you are proposing - or do the VLANs hang off the switches?
Their is also a DC-DC failover design guide.
Currently i have Asa's in both sites configured as gateways for the core's.
The two sites are 3 miles apart and we have the both Cisco cores connected trough our own 20G fiber
Site 1 is our primary DC with all the nat's for ADFS, VPN, outlook etc ..
I want to use Site 2 as our Failover DC, in case of a failure where ISP goes down at site 1, FW or the whole site goes down i want to be able to stand Site 2 with no interruption on services like ADFS.
I am not sure how meraki handles VIP or IBGP