Browse Definitions :
Definition

link layer discovery protocol (LLDP)

Contributor(s): Matthew Haughn

The link layer discovery protocol (LLDP) is an open and extendable part of the Internet protocol suite used in IEEE 802 to advertise a device’s identity and abilities, as well as other devices connected within the same network.

LLDP is mainly used in wired Ethernet-connected devices to facilitate management of network resources and simplify networking tasks for administrators in a multi-vendor network. The protocol’s multi-vendor support enables network discovery of devices and management tools like Simple Network Management Protocol (SNMP) in a network made up of devices from different manufacturers. LLDP makes it unnecessary to use a larger number of proprietary protocols to support a multi-vendor network or, on the other hand, limit oneself to the hardware of a single vendor.

On an interval schedule, an LLDP device sends its information in Ethernet frames. A frame starts with the required TLVs of Chassis ID, Port ID, and time-to-live (TTL). The frame contains the device’s destination MAC address as a multicast address that is not forwarded outside a network, assuming 802.1D compliance.

LLDP is also known as Station and Media Access Control Connectivity Discovery, as specified in IEEE 802.1AB. Similar proprietary protocols include Cisco Discovery Protocol (CDP), Extreme Discovery Protocol, Foundry Discovery Protocol (FDP), Microsoft's Link Layer Topology Discovery and Nortel Discovery Protocol (AKA SONMP).

This was last updated in March 2016

Continue Reading About link layer discovery protocol (LLDP)

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • California Consumer Privacy Act (CCPA)

    The California Consumer Privacy Act (CCPA) is legislation in the state of California that supports an individual's right to ...

  • compliance audit

    A compliance audit is a comprehensive review of an organization's adherence to regulatory guidelines.

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

SearchSecurity

  • privilege creep

    Privilege creep is the gradual accumulation of access rights beyond what an individual needs to do his job. In IT, a privilege is...

  • BlueKeep (CVE-2019-0708)

    BlueKeep (CVE-2019-0708) is a vulnerability in the Remote Desktop (RDP) protocol that affects Windows 7, Windows XP, Server 2003 ...

  • endpoint detection and response (EDR)

    Endpoint detection and response (EDR) is a category of tools and technology used for protecting computer hardware devices–called ...

SearchHealthIT

SearchDisasterRecovery

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

  • business continuity software

    Business continuity software is an application or suite designed to make business continuity planning/business continuity ...

SearchStorage

  • Hadoop as a service (HaaS)

    Hadoop as a service (HaaS), also known as Hadoop in the cloud, is a big data analytics framework that stores and analyzes data in...

  • blockchain storage

    Blockchain storage is a way of saving data in a decentralized network which utilizes the unused hard disk space of users across ...

  • disk mirroring (RAID 1)

    RAID 1 is one of the most common RAID levels and the most reliable. Data is written to two places simultaneously, so if one disk ...

Close