Technical Tip: How to configure PPPoE interface when ISP provides only VLAN ID

[jsarah]

Description	This article describes how to configure the PPPoE interface in FortiGate if ISP does not have an IP but just a VLAN ID.
Scope	Firmware 7.0 and above and in CLI only.
Solution	Step 1: Create a VLAN interface/sub-interface under the required physical interface. Follow the following KB article for creating VLAN tagged sub interface: Technical Tip: How to create a VLAN tagged interface (802.1q) on a FortiGate - tagged/untagged traff... Make sure you select the role of the interface as WAN. Example of configuration command in CLI: config system interface     edit "pppoe"                                               // Name of sub-interface.         set role wan                                        // Always select role WAN.         set interface "port3"                            // Bind it to the required physical interface, port 3 is used as an example.         set vlanid 20                                      // Mention the VLAN ID that the ISP has been given. VLAN id 20 is used as an example.        next end Step 2: configure PPPoE configuration commands as shown below: config system interface     edit "pppoe"         set vdom "root"         set mode pppoe         set username "<xxxxxx>"            // Provide the username.         set password "<yyyyyy">            // Provide the required password.     next end To troubleshoot issues regarding PPPoE, follow this article: Technical Tip: Troubleshooting PPPoE connection failed. Related articles: Technical Tip: How to create a VLAN tagged interface (802.1q) on a FortiGate - tagged/untagged traff... Technical Tip: PPPoE-interface configuration. Technical Tip: Troubleshooting PPPoE connection failed.