Is there anyone who is aware with which other vendors you can have interoperability with route based VPNs (xfrm interfaces)?
Thank you
Basically every vendor, which support VTI.
I am not aware of any vendor, which does not support XFRM.
Also Mikrotik ?
Do they support VTI?
https://forum.mikrotik.com/viewtopic.php?f=2&t=65734 No......