Edit the default LLDP phone profile on FortiVoice
Since some FortiFone models have LLDP disabled by default, make sure that LLDP is enabled so that the FortiFone can auto-discover the voice VLAN configuration.
Note that a new phone profile may be created instead of editing a default profile, however you must remember to apply the new profile across the whole deployment. Editing a pre-existing profile is strongly recommended.
- On FortiVoice, go to Phone System > Profile > Phone and select a default profile specific to your FortiFone model.
- Under VLAN, set Option to LLDP. Then select OK.