Cisco Systems 3750E Configuring LLDP and LLDP-MED

28-1

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02

Configuring LLDP and LLDP-MED

This chapter describes how to configure the Link Layer Discovery Protocol ( LLDP) and LLDP Media

Endpoint Discovery (LLDP-MED) on the Catalyst 3750-E or 3560-E switc h. Unless otherwise noted,

the term switch refers to a Catalyst 3750-E or 3560-E standalone switch and to a Catalyst 3750-E switch

stack.

Note For complete syntax and usage information for the commands used in this chapter, see the command

reference for this release and the “System Management Commands” section in the Cisco IOS

Configuration Fundamentals Command Reference, Release 12.2.

This chapter consists of these sections:

•Understanding LLDP and LLDP-MED, page 28-1

•Configuring LLDP and LLDP-MED, page 28-3

•Monitoring and Maintaining LLDP and LLDP-MED, page 28-7

This section contains this conceptual information:

•Understanding LLDP, page 28-1

•Understanding LLDP-MED, page 28-2

The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the dat a link

layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches). CDP allows

network management applications to automatically discover and lear n about other Cisco devices

connected to the network.

To support non-Cisco devices and to allow for interoperability between other devices, the switch

supports the IEEE 802.1AB Link Layer Discovery Protocol (LLDP). LLDP is a neighbor discovery

protocol that is used for network devices to advertise information about themselves to other devices on

the network. This protocol runs over the data-link layer, which allows two systems running different

network layer protocols to learn about each other.