VLAN assignments on FortiSwitch ports must follow certain rules and guidelines to ensure network integrity and proper traffic segregation:
Only Assign One Native VLAN on a Port (C):
Native VLAN Configuration: Each switch port can have only one native VLAN. The native VLAN carries untagged traffic for that port. If the port receives untagged frames, they are assumed to belong to the native VLAN.
Importance of Singular Native VLAN: This is crucial for preventing VLAN hopping attacks and ensures clear and secure VLAN demarcation on each port.
Assign Untagged VLANs Using FortiGate CLI (D):
CLI Configuration: Untagged VLANs, often equivalent to the native VLAN, can be assigned through the FortiGate CLI when managing a FortiSwitch via FortiLink. This allows for central management and configuration of VLANs across connected switches.
Operational Efficiency: Using the CLI ensures that VLAN settings are applied uniformly, reducing the likelihood of misconfigurations that might occur when managing VLANs individually on each switch.
Reference:
For detailed instructions and best practices on VLAN configuration on FortiSwitch, refer to the FortiSwitch administration guide available on: Fortinet Product Documentation