Configuring Switching Information 407Configuring Link Layer Discovery Protocol (LLDP) for MediaEndpoint DevicesThe IEEE 802.1AB standard, which describes the Link Layer Discovery Protocol (LLDP), formalizes thediscovery and capability retrieval of elements in a data network in a LAN/MAN environment. Theinformation exchanged is stored in MIBs, and the information is accessible by a network managementsystem (NMS) like SNMP. This framework is extensible and allows advanced utilization is areas like VoIPnetworks.The Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-MED) provides an extension tothe LLDP standard for network configuration and policy, device location, Power over Ethernetmanagement, and inventory management.LLDP-MED uses LLDP's organizationally-specific TLV extensions and defines new TLVs that make iteasier for a VoIP deployment in a wired or wireless LAN/MAN environment. It also makes mandatory afew optional TLVs from LLDP and recommends not transmitting some TLVs.Since LLDP-MED uses the framework of LLDP, it is bound by the same requirements of the originalspecification. The frame format, restrictions and implications are all preserved.The TLVs only communicate information; these TLVs do not automatically translate into configuration.An external application may query the MED MIB and take management actions in configuringfunctionality.The LLDP-MED menu page contains links to the following features:• LLDP Configuration• LLDP-MED Interface Configuration• LLDP-MED Local Device Information• LLDP-MED Remote Device InformationLLDP-MED Global ConfigurationUse the LLDP-MED Global Configuration page to change or view the LLDP-MED parameters thataffect the entire system.Table 7-52. LLDP Connections CommandsCLI Command Descriptionshow lldp interface Displays the current LLDP interface state.show lldp local-device Displays the LLDP local datashow lldp remote-device Displays the LLDP remote dataclear lldp remote data Deletes all data from the remote data table.
