Stop creating VLANs on a single interface on your FortiGate — it’s one of the most common mistakes I see network engineers make. If that port goes down, your entire network goes down with it. In this video, I’ll show you the correct, professional method using a redundant interface, VLANs, zones, and clean firewall policies. Let’s fix your FortiGate setup. What You’ll Learn in This Video: using a single port for multiple VLANs can cause issues to create a redundant interface on FortiGate to add VLANs on top of a redundant interface basic inter-VLAN policies clean firewall zones zone-based firewall policies failover testing by disconnecting redundant links ⏱Timestamps: 00:00 – Overview & Network Topology 01:27 – Why Using a Single Port for VLANs Is a Bad Idea 02:45 – Creating a Redundant Interface on FortiGate 03:50 – Adding VLAN100 & VLAN200 on the Redundant Interface 08:00 – Creating a Basic Inter-VLAN Policy 11:15 – Creating Zones for Clean Firewall Design 13:02 – Creating a Zone-Based Policy 14:35 – Failover Test: Disconnecting One Redundant Link #FortiGate #VLAN #Firewall #Networking #ITTraining #ZoneBasedPolicy #Failover #NetworkEngineering #Fortinet #cybersecurity Related Video: 🔒 How to Set up Duo MFA for FortiGate SSL VPN (LDAP/RADIUS) | Step-by-Step Tutorial