@CotGef
Default Gateway should be on the DHCP response from the DHCP server. Dont make sense put this information on each device.
Who is providing DHCP service ?
If you are using thirty part DHCP service, Meraki should be configured as DHCP relay:
- Navigate to Security appliance > Configure > DHCP
- Locate the subnet in the list that should have DHCP relay enabled.
- For 'Client addressing', change the drop-down menu to 'Relay DHCP to another server'.
- In the 'DHCP server IP' box that appears, enter the IP address of the DHCP server that should serve this subnet.
- At the bottom of the page, click 'Save Changes'.
-If I helped you somehow, please, rate it as useful.-