We have a Fortinet FortiWifi 30e connected to BT fibre. There is a single software switch including all 4 ports. There is a DHCP server and scope (192.168.5.x) running on the internal interface.
I have defined VLAN_10, set the VLAN ID as 10 and created a second DHCP server and scope (192.168.10.x).
There is a single cable running from port 1 on the Fortinet to a ubiquiti 16 port POE switch. 5 yealink T46s phones are directly connected to the Ubiquiti switch and 5 laptops connected via the second port on the back of each phone. All devices get IP addresses from the internal range i.e. 5.x
When I set the VLAN tag on a laptop to 10 it will get an IP address from the 2nd scope i.e. 10.x as expected.
BT provided the phones and will not allow us access to the configuration so I can set the VLAN tag on the phones to 10. They have suggested that we enable LLDP-MED for VLAN_10 and this will force the phones to pickup an address from the 2nd scope.
Any suggestions as to how this is done? (preferably in noob speak)