1-5The Power Stateful Control TLV is defined in IEEE P802.3at D1.0. The later versions no longer supportthis TLV. H3C devices send this type of TLVs only after receiving them.LLDP-MED TLVsLLDP-MED TLVs provide multiple advanced applications for voice over IP (VoIP), such as basicconfiguration, network policy configuration, and address and directory management. LLDP-MED TLVssatisfy the voice device vendors’ requirements for cost effectiveness, ease of deployment, and ease ofmanagement. In addition, LLDP-MED TLVs make deploying voice devices in Ethernet easier.LLDP-MED TLVs are shown in Table 1-6:Table 1-6 LLDP-MED TLVsType DescriptionLLDP-MED Capabilities Allows a MED endpoint to advertise the supported LLDP-MEDTLVs and its device type.Network PolicyAllows a network device or MED endpoint to advertise LAN typeand VLAN ID of the specific port, and the Layer 2 and Layer 3priorities for a specific set of applications.Extended Power-via-MDI Allows a network device or MED endpoint to advertisepower-related information (according to IEEE 802.3AF).Hardware Revision Allows a MED endpoint device to advertise its hardware version.Firmware Revision Allows a MED endpoint to advertise its firmware version.Software Revision Allows a MED endpoint to advertise its software version.Serial Number Allows an LLDP-MED endpoint device to advertise its serialnumber.Manufacturer Name Allows a MED endpoint to advertise its vendor name.Model Name Allows a MED endpoint to advertise its model name.Asset IDAllows a MED endpoint to advertise its asset ID. The typical caseis that the user specifies the asset ID for the endpoint to facilitatedirectory management and asset tracking.Location IdentificationAllows a network device to advertise the appropriate locationidentifier information for an endpoint to use in the context oflocation-based applications.Management addressThe management address of a device is used by the network management system to identify andmanage the device for topology maintenance and network management. The management address isencapsulated in the management address TLV.Operating Modes of LLDPLLDP can operate in one of the following modes:
