You could consider deploying Cisco's virtualisation platform for networking -  NVIS (on a pair of servers, for example).  This allows you to run virtual MXs in your own DC.   https://community.meraki.com/t5/Feature-Announcements/Introducing-the-new-vMX-on-Cisco-NFVIS-for-Private-Cloud/ba-p/121127 ... View more