Troubleshooting Tip: Unable to connect bridge SSID with optional VLAN ID

[mle2802]

Description	This article describes the reason why WiFi clients experience connection errors when connecting to bridge SSID with optional VLAN ID.
Scope	FortiGate.
Solution	In this example, 'Henry_wifi' is in bridge mode with an optional VLAN ID set to 10. When attempting to connect to the SSID, the client cannot connect accordingly and timeout after a while. This happens because the pre-defined VLAN is not allowed in the FortiSwitch port and hence, the WiFi client cannot get the IP accordingly from the DHCP server. By adding the optional VLAN configured in SSID to allowed VLANs, the DHCP traffic will be allowed and Wi-fi clients will be able to get the correct IPs for connection.