Replicate with Site Recovery Manager

[virtualhelp]

I have some questions about Site Recovery manager, I hope you can help me:

Could you configure Site Recovery Manager 8.4 on a site with VMFS storage and the alternate SRM 8.5 site with vSAN storage?

Do the primary site hosts have vSwitch Standard and the alternate site hosts have distributed vSwitch. (This would cause problems)?

Can both SRM appliances be in the same IP range of the vCenter, or should the range be different?

[nachogonzalez]

Could you configure Site Recovery Manager 8.4 on a site with VMFS storage and the alternate SRM 8.5 site with vSAN storage?

Yes, you can. 
I would recommend using the same version.
For the replication you should use vSphere replication.

Do the primary site hosts have vSwitch Standard and the alternate site hosts have distributed vSwitch. (This would cause problems)?
https://docs.vmware.com/en/vSphere-Replication/8.6/rn/vsphere-replication-compat-matrix-8-6.html

https://docs.vmware.com/en/Site-Recovery-Manager/8.1/com.vmware.srm.install_config.doc/GUID-384B628F...

There is no specific requirement listed regarding vDS or VSS.
Keep in mind you will have to map each network on site A to each network on site B when configured the recovery 

Can both SRM appliances be in the same IP range of the vCenter, or should the range be different?

As far as i remember, you require 2 vCenters minimum.
https://docs.vmware.com/en/Site-Recovery-Manager/8.1/com.vmware.srm.install_config.doc/GUID-5263D308...