---
title: Features
---

`lldpd` supports **several discovery protocols** and is smart enough
to select the right protocol on each interface:

 - LLDP, of course
 - CDP (Cisco)
 - EDP (Extreme)
 - SONMP (Nortel)
 - FDP (Foundry)

It is able to advertise the following TLV:

 - System name and description
 - Port name and description
 - VLAN ID and names
 - IPv4/IPv6 management address
 - MAC/PHY information
 - MDI power (802.3af and 802.3at)
 - Link aggregation
 - Network policies (LLDP-MED)
 - Location (LLDP-MED)
 - Inventory (LLDP-MED)

`lldpd` supports many OS:

 - GNU/Linux
 - FreeBSD
 - NetBSD
 - OpenBSD
 - macOS
 - Solaris

Moreover, it can handle correctly VLAN, link aggregates and bridges on
all those platforms, except on Solaris.

Discovered neighbors can be queried through a convenient **command
line** interface:

    ::console
    # show neighbors detail
    -------------------------------------------------------------------------------
    Interface:    eth0, via: LLDP, RID: 1, Time: 0 day, 00:00:10
      Chassis:     
        ChassisID:    mac 00:18:f3:03:4e:06
        SysName:      dev-01.example.com
        SysDescr:     Debian GNU/Linux 7.0 (wheezy) Linux 3.7-trunk-amd64 #1 SMP Debian 3.7.1-1~experimental.1 x86_64
        MgmtIP:       192.168.20.127
        Capability:   Bridge, on
        Capability:   Router, on
        Capability:   Wlan, off
      Port:        
        PortID:       mac ea:b8:ab:aa:8c:da
        PortDescr:    eth1
        PMD autoneg:  supported: no, enabled: no
          MAU oper type: 10GigBaseR - R PCS/PMA, unknown PMD.
      LLDP-MED:    
        Device Type:  Media Endpoint (Class II)
        Capability:   Capabilities
        Capability:   Policy
        Capability:   Location
        Capability:   MDI/PSE
        Capability:   MDI/PD
        Capability:   Inventory
        Inventory:   
          Hardware Revision: System Version
          Software Revision: 3.7-trunk-amd64
          Firmware Revision: 2104   
          Serial Number: System Serial Number
          Manufacturer: System manufacturer
          Model:        System Product Name
          Asset ID:     Asset-1234567890
    -------------------------------------------------------------------------------

They can also be queried through SNMP with the built-in SNMP
subagent. Or through a Unix socket with the provided library.

*[LLDP]: Link Layer Discovery Protocol
*[CDP]: Cisco Discovery Protocol
*[EDP]: Extreme Discovery Protocol
*[FDP]: Foundry Discovery Protocol
*[SONMP]: SynOptics Network Management Protocol
*[MED]: Media Endpoint Discovery

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