Cisco Meraki MX Security Appliances support Point to Point Protocol over Ethernet (PPPoE). You may need PPPoE if your ISP requires a username and password to access your DSL connection. PPPoE can be configured on the device's Local Status Page, under the Configure tab by setting the Connection type to PPPoE:
Please note that PPPoE is not supported by Cisco Meraki MR Series Access Points. A successful workaround for MR Series Access Points is to use a security appliance or router (such as a Cisco Meraki MX, Linksys, Netgear or D-Link) that supports PPPoE and then connect the Cisco Meraki AP to one of the LAN Ethernet ports. Cisco Meraki recommends turning off the wireless functionality of the non-Meraki routers that have wireless capabilities.
Note: PPPoE is unrelated to Power over Ethernet (PoE).