LLDP reception

Natively, device detection can scan LLDP as a source for device identification. However, the FortiGate does not read or store the full information. Enabling LLDP reception allows the FortiGate to receive and store LLDP messages, learn about active neighbors, and makes the LLDP information available via the CLI, REST API, and SNMP.

You will need to enable device-identification at the interface level, and then lldp-reception can be enabled on three levels: globally, per VDOM, or per interface.

To configure device identification on an interface:

config system interface
    edit <port>
        set device-identification enable
    next
end

To configure LLDP reception globally:

config system global
    set lldp-reception enable
end

To configure LLDP reception per VDOM:

config system setting
    set lldp-reception enable
end

To configure LLDP reception per interface:

config system interface
    edit <port>
        set lldp-reception enable
    next
end

To view the LLDP information in the GUI:

1. Go to User & Device > Device Inventory to view the information.

To view the received LLDP information in the CLI:

# diagnose user device list
    hosts
      vd root/0 44:0a:a0:0a:0a:0a gen 3 req S/2
        created 10290s gen 1 seen 0s port3 gen 1
        ip 172.22.22.22 src lldp
        type 20 'Other Network Device' src lldp id 155 gen 2
        os 'Artist EOS ' version '4.20.4' src lldp id 155
        host 'artist' src lldp

To view additional information about LLDP neighbors and ports:

# diagnose lldprx neighbor {summary | details | clear}

# diagnose lldprx port {details | summary | neighbor | filter}

# diagnose lldprx port neighbor {summary | details}

Note that the port index in the output corresponds to the port index from the following command:

# diagnose netlink interface list port2 port3 | grep index
      if=port2 family=00 type=1 index=4 mtu=1500 link=0 master=0
      if=port3 family=00 type=1 index=5 mtu=1500 link=0 master=0

To view the received LLDP information in the REST API:

{
  "http_method":"GET",
  "results":[
    {
      "mac":"90:9c:9c:c9:c9:90",
      "chassis_id":"90:9C:9C:C9:C9:90",
      "port":19,
      "port_id":"port12",
      "port_desc":"port12",
      "system_name":"S124DN3W00000000",
      "system_desc":"FortiSwitch-124D v3.6.6,build0416,180515 (GA)",
      "ttl":120,
      "addresses":[
        {
          "type":"ipv4",
          "address":"192.168.1.99"
        }
      ]
    }
  ],
  "vdom":"root",
  "path":"network",
  "name":"lldp",
  "action":"neighbors",
  "status":"success",
  "serial":"FG201E4Q00000000",
  "version":"v6.2.0",
  "build":866
}

{
  "http_method":"GET",
  "results":[
    {
      "name":"port1",
      "rx":320,
      "neighbors":1
    }
  ],
  "vdom":"root",
  "path":"network",
  "name":"lldp",
  "action":"ports",
  "mkey":"port1",
  "status":"success",
  "serial":"FG201E4Q00000000",
  "version":"v6.2.0",
  "build":866
}