Link Layer Description Protocol
Link Layer Description Protocol (LLDP) is supported in FortiOS 5.2. LLDP allows a device to advertise its existence and capabilities to other devices.
The primary use for LLDP is to improve a FortiGate unit's device detection output when another FortiGate unit is detected. LLDP information is used to populate the device record on the FortiGate unit performing device detection. Any LLDP information transmitted by a peer is ignored unless FortiGate device detection is enabled on an interface. If device detection is enabled, then the subset of LLDP information sent by the peer that is relevant to device detection is shown in the diagnose user device list output.
The transmitted LLDP attributes on a given port are:
• Chassis ID
• Port ID
• TTL
• System Name
• System Description
• System Capabilities
• Aggregation
• Host Name
LLDP transmission is enabled by default on all ports that support a MAC address. It can be disabled globally, or disabled on some interfaces or VDOMs, while being enabled on others.
Syntax
To disable LLDP globally or on a specific VDOM, use the following command:
config system global
set lldp-transmission disable
end
To enable LLDP at the individual interface level, first disable LLDP globally, then use the following command:
config system interface
edit <name>
set lldp-transmission enable
end
end