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142 lines
4.9 KiB
ReStructuredText
142 lines
4.9 KiB
ReStructuredText
.. _lldp:
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####
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LLDP
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####
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:abbr:`LLDP (Link Layer Discovery Protocol)` is a vendor-neutral link layer
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protocol in the Internet Protocol Suite used by network devices for advertising
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their identity, capabilities, and neighbors on an IEEE 802 local area network,
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principally wired Ethernet. The protocol is formally referred to by the IEEE
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as Station and Media Access Control Connectivity Discovery specified in IEEE
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802.1AB and IEEE 802.3-2012 section 6 clause 79.
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LLDP performs functions similar to several proprietary protocols, such as
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:abbr:`CDP (Cisco Discovery Protocol)`, :abbr:`FDP (Foundry Discovery Protocol)`,
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:abbr:`NDP (Nortel Discovery Protocol)` and :abbr:`LLTD (Link Layer Topology
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Discovery)`.
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Information gathered with LLDP is stored in the device as a :abbr:`MIB
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(Management Information Database)` and can be queried with :abbr:`SNMP (Simple
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Network Management Protocol)` as specified in :rfc:`2922`. The topology of an
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LLDP-enabled network can be discovered by crawling the hosts and querying this
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database. Information that may be retrieved include:
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* System Name and Description
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* Port name and description
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* VLAN name
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* IP management address
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* System capabilities (switching, routing, etc.)
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* MAC/PHY information
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* MDI power
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* Link aggregation
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Configuration
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=============
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.. cfgcmd:: set service lldp
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Enable LLDP service
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.. cfgcmd:: set service lldp management-address <address>
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Define IPv4 management address transmitted via LLDP.
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.. cfgcmd:: set service lldp interface <interface>
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Enable transmission of LLDP information on given `<interface>`. You can also
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say ``all`` here so LLDP is turned on on every interface.
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.. cfgcmd:: set service lldp interface <interface> disable
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Disable transmit of LLDP frames on given `<interface>`. Useful to exclude
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certain interfaces from LLDP when ``all`` have been enabled.
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.. cfgcmd:: set service lldp snmp enable
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Enable SNMP queries of the LLDP database
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.. cfgcmd:: set service lldp legacy-protocols <cdp|edp|fdp|sonmp>
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Enable given legacy protocol on this LLDP instance. Legacy protocols include:
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* ``cdp`` - Listen for CDP for Cisco routers/switches
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* ``edp`` - Listen for EDP for Extreme routers/switches
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* ``fdp`` - Listen for FDP for Foundry routers/switches
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* ``sonmp`` - Listen for SONMP for Nortel routers/switches
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Operation
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=========
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.. opcmd:: show lldp neighbors
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Displays information about all neighbors discovered via LLDP.
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.. code-block:: none
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vyos@vyos:~# show lldp neighbors
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Capability Codes: R - Router, B - Bridge, W - Wlan r - Repeater, S - Station
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D - Docsis, T - Telephone, O - Other
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Device ID Local Proto Cap Platform Port ID
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--------- ----- ----- --- -------- -------
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Switch0815 eth0 LLDP B Cisco IOS Software, Gi0/4
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.. opcmd:: show lldp neighbors detail
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Get detailed information about LLDP neighbors.
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.. code-block:: none
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vyos@vyos:~# show lldp neighbors detail
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-------------------------------------------------------------------------------
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LLDP neighbors:
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-------------------------------------------------------------------------------
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Interface: eth0, via: LLDP, RID: 1, Time: 12 days, xxxx:xxxx:40
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Chassis:
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ChassisID: mac 00:50:40:20:03:00
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SysName: Switch0815
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SysDescr: Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE11, RELEASE SOFTWARE (fc3)
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Technical Support: http://www.cisco.com/techsupport
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Copyright (c) 1986-2017 by Cisco Systems, Inc.
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Compiled Sat 19-Aug-17 09:34 by prod_rel_team
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MgmtIP: 192.0.2.201
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Capability: Bridge, on
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Port:
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PortID: ifname Gi0/4
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PortDescr: GigabitEthernet0/4
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TTL: 120
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PMD autoneg: supported: yes, enabled: yes
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Adv: 10Base-T, HD: yes, FD: yes
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Adv: 100Base-TX, HD: yes, FD: yes
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Adv: 1000Base-T, HD: no, FD: yes
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MAU oper type: 1000BaseTFD - Four-pair Category 5 UTP, full duplex mode
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VLAN: 1, pvid: yes
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LLDP-MED:
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Device Type: Network Connectivity Device
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Capability: Capabilities, yes
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Capability: Policy, yes
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Capability: Location, yes
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Capability: Inventory, yes
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LLDP-MED Network Policy for: Voice, Defined: no
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Priority: Best effort
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PCP: 0
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DSCP Value: 0
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LLDP-MED Network Policy for: Voice Signaling, Defined: no
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Priority: Best effort
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PCP: 0
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DSCP Value: 0
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Inventory:
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Hardware Revision: WS-C2960G-8TC-L (PowerPC405):C0
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Software Revision: 15.0(2)SE11
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Manufacturer: Cisco Systems, Inc.
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Model: WS-C2960G-8TC-L
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.. opcmd:: show lldp neighbors interface <interface>
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Show LLDP neighbors connected via interface `<interface>`.
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.. opcmd:: show log lldp
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Used for troubleshooting.
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