Created on
08-31-2018
05:43 PM
Edited on
11-24-2021
01:09 AM
By
Anthony_E
Description
This article describes how to process non-tagged packets on a transparent unit. When sending NON-Tagged packets from a Switch to a FortiGate unit in transparent mode, packets are dropped unless the receiving interface is a physical one.
Solution
On FortiGate units, the physical interfaces are the only ones able to process (send and accept) non-tagged packets.
Non-Tagged packets (like VTP, CDP, ...) should never be directed to a non-physical interface, like a VLAN sub-interface. Also "stpforward" must be applied on the port configuration.
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