LLDP Configuration

The Link Layer Discovery Protocol (LLDP) is a Layer 2 discovery protocol defined in IEEE 802.1ab. Deploying LLDP improves network management system (NMS) capabilities. LLDP supplies the NMS with detailed information about network topology and changes to topology, and it detects inappropriate configurations existing on the network. The information provided by LLDP helps administrators monitor network status in real time to keep the network secure and stable.

Overview of LLDP: LLDP provides a standard link-layer discovery method to encapsulate information about the capabilities, management address, device ID, and interface ID of a local device into LLDP packets. These packets are sent to neighboring devices that save the information received in a standard Management Information Base (MIB) to help the NMS query and determine the communication status of links.

Configuration Precautions for LLDP

Configuring Basic LLDP Functions: After devices are configured with LLDP, the NMS can obtain network topology information, and information about the capabilities, management address, device ID, and interface ID of each device.

Configuring the LLDP Alarm Function: This section describes how to configure the LLDP alarm function on a network device, so that the device can send alarms to the NMS when information about neighbors changes.

Maintaining LLDP: Maintaining LLDP includes clearing information about LLDP statistics and monitoring LLDP status.

Configuration Examples for LLDP: The configuration examples provide networking requirements, configuration roadmap, data preparation, and configuration procedures