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The IP Phones require an IP address from the Voice VLAN block, and this requirement applies to the scenario where there is a computer and an IP phone connected to the same port, at the FortiSwitch. The Data VLAN is configured as the native VLAN and the Voice VLAN is configured as the Allowed VLAN on the switch port.
It is necessary to apply the following setting at the VLAN interface to detect the IP phone and retrieve the IP address from the Voice VLAN.
config switch-controller lldp-profile
edit "Phone"
set med-tlvs inventory-management network-policy location-identification
set auto-isl disable
config med-network-policy
edit "voice"
set status enable
set vlan-intf "VOICE-VLAN"
set assign-vlan enable
set dscp 46
next
edit "voice-signaling"
set status enable
set vlan-intf "VOICE-VLAN"
set assign-vlan enable
next
end
Then, apply this LLDP profile on the FortiSwitch port and the IP phones can get the IP from the Voice VLAN.
It will be necessary to assign this LLDP profile to the port on the switch where the phone will connect. In this example, 'DATA-VLAN' is the native. VLAN and VOICE-VLAN are the IP phones' VLANs. LLDP is enabled. By default, for sending and receiving, make sure to have LLDP enabled on the IP phone.
config switch-controller managed-switch
edit <SWITCH SERIAL NUMBER>
config ports
edit "port#"
set vlan "DATA-VLAN"
set allowed-vlans "VOICE-VLAN"
set lldp-profile "Phone"
set lldp-status tx-rx
next
end
Related document:
Configuration notes.
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