Administrator Guide

Link Layer Discovery Protocol (LLDP)

Link layer discovery protocol (LLDP) advertises connectivity and management from the local station to the

adjacent stations on an IEEE 802 LAN.

LLDP facilitates multi-vendor interoperability by using standard management tools to discover and make

available a physical topology for network management. The Dell Networking operating software

implementation of LLDP is based on IEEE standard 801.1ab.

The starting point for using LLDP is invoking LLDP with the protocol lldp command in either

CONFIGURATION or INTERFACE mode.

The information LLDP distributes is stored by its recipients in a standard management information base (MIB).

You can access the information by a network management system through a management protocol such as

simple network management protocol (SNMP).

An Aggregator auto-configures to support the link layer discovery protocol (LLDP) for the auto-discovery of

network devices. You can use CLI commands to display acquired LLDP information, clear LLDP counters, and

debug LACP operation.

Supported Modes

Standalone, PMUX, VLT, Stacking

Topics:

• Protocol Data Units

• Configure LLDP

• CONFIGURATION versus INTERFACE Configurations

• Enabling LLDP

• Advertising TLVs

• Optional TLVs

• LLDP Operation

• Viewing the LLDP Configuration

• Viewing Information Advertised by Adjacent LLDP Agents

• Configuring LLDPDU Intervals

• Configuring a Time to Live

• Clearing LLDP Counters

• Debugging LLDP

• Relevant Management Objects

Link Layer Discovery Protocol (LLDP) 549