For my first Silly Meraki Trick I will show you how to get a NAT translation for LANtoLAN traffic on an MX appliance.
The Meraki MX appliance will, by default, always NAT traffic moving between WAN and LAN, but it will not NAT between LAN and LAN. However, you can leverage the 1:Many and 1:1 NAT features to simulate a NAT between two LAN networks. To illustrate this I have a Raspberry Pi behind an MX on VLAN 10 with an IP of 192.168.100.5. I then created the following 1:Many NAT rule under Security appliance > firewall:
So then as a test I then SSH'd to the 1:Many IP, which "hairpins" me back to the same Raspberry PI.
Very cool. So while not quite a true hairpin, it does the exact same thing.