MX and Z1 appliances can use either dynamic or static network connection information. You may configure a static IP address on a Cisco Meraki MX or Z1 from Dashboard or locally.
Static IP assignment via the Meraki Dashboard is currenlty only available in beta.
If a VLAN is specified in the static IP configuration, traffic from the MX will be sent out tagged with 802.1q for that VLAN.
If the MX is not able to reach the default gateway on this static assignment, it will fall back to DHCP.
For further information on static IP assignment on MX and Z1 appliances, see the following related articles: