.. _lldp: #### LLDP #### :abbr:`LLDP (Link Layer Discovery Protocol)` is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet. The protocol is formally referred to by the IEEE as Station and Media Access Control Connectivity Discovery specified in IEEE 802.1AB and IEEE 802.3-2012 section 6 clause 79. LLDP performs functions similar to several proprietary protocols, such as :abbr:`CDP (Cisco Discovery Protocol)`, :abbr:`FDP (Foundry Discovery Protocol)`, :abbr:`NDP (Nortel Discovery Protocol)` and :abbr:`LLTD (Link Layer Topology Discovery)`. Information gathered with LLDP is stored in the device as a :abbr:`MIB (Management Information Database)` and can be queried with :abbr:`SNMP (Simple Network Management Protocol)` as specified in :rfc:`2922`. The topology of an LLDP-enabled network can be discovered by crawling the hosts and querying this database. Information that may be retrieved include: * System Name and Description * Port name and description * VLAN name * IP management address * System capabilities (switching, routing, etc.) * MAC/PHY information * MDI power * Link aggregation Configuration ============= .. cfgcmd:: set service lldp Enable LLDP service .. cfgcmd:: set service lldp management-address <address> Define IPv4/IPv6 management address transmitted via LLDP. Multiple addresses can be defined. Only addresses connected to the system will be transmitted. .. cfgcmd:: set service lldp interface <interface> Enable transmission of LLDP information on given `<interface>`. You can also say ``all`` here so LLDP is turned on on every interface. .. cfgcmd:: set service lldp interface <interface> disable Disable transmit of LLDP frames on given `<interface>`. Useful to exclude certain interfaces from LLDP when ``all`` have been enabled. .. cfgcmd:: set service lldp snmp enable Enable SNMP queries of the LLDP database .. cfgcmd:: set service lldp legacy-protocols <cdp|edp|fdp|sonmp> Enable given legacy protocol on this LLDP instance. Legacy protocols include: * ``cdp`` - Listen for CDP for Cisco routers/switches * ``edp`` - Listen for EDP for Extreme routers/switches * ``fdp`` - Listen for FDP for Foundry routers/switches * ``sonmp`` - Listen for SONMP for Nortel routers/switches Operation ========= .. opcmd:: show lldp neighbors Displays information about all neighbors discovered via LLDP. .. code-block:: none vyos@vyos:~$ show lldp neighbors Capability Codes: R - Router, B - Bridge, W - Wlan r - Repeater, S - Station D - Docsis, T - Telephone, O - Other Device ID Local Proto Cap Platform Port ID --------- ----- ----- --- -------- ------- BR2.vyos.net eth0 LLDP R VyOS 1.2.4 eth1 BR3.vyos.net eth0 LLDP RB VyOS 1.2.4 eth2 SW1.vyos.net eth0 LLDP B Cisco IOS Software GigabitEthernet0/6 .. opcmd:: show lldp neighbors detail Get detailed information about LLDP neighbors. .. code-block:: none vyos@vyos:~$ show lldp neighbors detail ------------------------------------------------------------------------------- LLDP neighbors: ------------------------------------------------------------------------------- Interface: eth0, via: LLDP, RID: 28, Time: 0 day, 00:24:33 Chassis: ChassisID: mac 00:53:00:01:02:c9 SysName: BR2.vyos.net SysDescr: VyOS 1.3-rolling-201912230217 MgmtIP: 192.0.2.1 MgmtIP: 2001:db8::ffff Capability: Bridge, on Capability: Router, on Capability: Wlan, off Capability: Station, off Port: PortID: mac 00:53:00:01:02:c9 PortDescr: eth0 TTL: 120 PMD autoneg: supported: no, enabled: no MAU oper type: 10GigBaseCX4 - X copper over 8 pair 100-Ohm balanced cable VLAN: 201 eth0.201 VLAN: 205 eth0.205 LLDP-MED: Device Type: Network Connectivity Device Capability: Capabilities, yes Capability: Policy, yes Capability: Location, yes Capability: MDI/PSE, yes Capability: MDI/PD, yes Capability: Inventory, yes Inventory: Hardware Revision: None Software Revision: 4.19.89-amd64-vyos Firmware Revision: 6.00 Serial Number: VMware-42 1d 83 b9 fe c1 bd b2-7 Manufacturer: VMware, Inc. Model: VMware Virtual Platform Asset ID: No Asset Tag ------------------------------------------------------------------------------- .. opcmd:: show lldp neighbors interface <interface> Show LLDP neighbors connected via interface `<interface>`. .. opcmd:: show log lldp Used for troubleshooting.