Cisco Systems 3750E manual Configuring Lldp and LLDP-MED, Understanding Lldp and LLDP-MED, 28-1

C H A P T E R 28

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 switch. 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

Understanding LLDP and LLDP-MED

This section contains this conceptual information:

•Understanding LLDP, page 28-1

•Understanding LLDP-MED, page 28-2

Understanding LLDP

The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the data link layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches). CDP allows network management applications to automatically discover and learn 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.

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

OL-9775-02 28-1