Lldp Configuration; Overview; Background; Basic Concepts - H3C S5120-SI Series Operation Manual

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LLDP Configuration

When configuring LLDP, go to these sections for information you are interested in:

Overview

LLDP Configuration Task List
Performing Basic LLDP Configuration
Configuring CDP Compatibility
Configuring LLDP Trapping
Displaying and Maintaining LLDP
LLDP Configuration Examples
Overview

Background

In a heterogeneous network, it is important that different types of network devices from different vendors
can discover one other and exchange configuration for interoperability and management sake. This
calls for a standard configuration exchange platform.
To address the needs, the IETF drafted the Link Layer Discovery Protocol (LLDP) in IEEE 802.1AB. The
protocol operates on the data link layer to exchange device information between directly connected
devices. With LLDP, a device sends local device information as TLV (type, length, and value) triplets in
LLDPDUs to the directly connected devices, and at the same time, stores the device information
received in LLDPDUs sent from the LLDP neighbors in a standard management information base (MIB).
It allows a network management system to fast detect Layer-2 network topology change and identify
what the change is.
For more information about MIBs, refer to SNMP Configuration in this manual.

Basic Concepts

LLDPDUs
LLDP sends device information in LLDP data units (LLDPDUs). LLDPDUs are encapsulated in Ethernet
II or SNAP frames.
1) LLDPDUs encapsulated in Ethernet II
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