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CHAPTER
27-1
Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter Software Configuration Guide
OL-12189-01
27
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 switch. Unless otherwise noted, the term switch refers to a
standalone switch and to a 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 Carrier Ethernet s Command Reference at this URL:
http://www.cisco.com/en/US/docs/ios/cether/command/reference/ce_02.html
This chapter consists of these sections:
• Understanding LLDP and LLDP-MED, page 27-1
• Configuring LLDP and LLDP-MED, page 27-3
• Monitoring and Maintaining LLDP and LLDP-MED, page 27-7
Understanding LLDP and LLDP-MED
This section contains this conceptual information:
• Understanding LLDP, page 27-1
• Understanding LLDP-MED, page 27-2
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.