H3C Technologies H3C S5120 Series Switches - Manual (Page 129)

1-5
LLDP-MED TLVs
LLDP-MED TLVs provide multiple advanced applications for voice over IP (VoIP), such as basic
configuration, network policy configuration, and address and directory management. LLDP-MED TLVs
provide a cost-effective and easy-to-use solution for deploying voice devices in Ethernet. LLDP-MED
TLVs are shown in Table 1-6 :
Table 1-6 LLDP-MED TLVs
Type Description
LLDP-MED Capabilities
Allows a network device to advertise the LLDP-MED TLVs it
supports
Network Policy
Allows a network device or terminal device to advertise VLAN
ID of the specific port, VLAN type, and the Layer 2 and Layer 3
priorities for specific applications
Extended Power-via-MDI
Allows a network device or terminal device to advertise power
supply capability. This TLV is an extension of the Power Via
MDI TLV.
Hardware Revision Allows a terminal device to advertise its hardware version
Firmware Revision Allows a terminal device to advertise its firmware version
Software Revision Allows a terminal device to advertise its software version
Serial Number Allows a terminal device to advertise its serial number
Manufacturer Name Allows a terminal device to advertise its vendor name
Model Name Allows a terminal device to advertise its model name
Asset ID
Allows a terminal device to advertise its asset ID. The typical
case is that the user specifies the asset ID for the endpoint to
facilitate directory management and asset tracking.
Location Identification
Allows a network device to advertise the appropriate location
identifier information for a terminal device to use in the context
of location-based applications
Management address
The management address of a device is used by the network management system to identify and
manage the device for topology maintenance and network management. The management address is
encapsulated in the management address TLV.
How LLDP Works
Operating Modes of LLDP
LLDP can operate in one of the following modes:
z TxRx mode. A port in this mode sends and receives LLDPDUs.
z Tx mode. A port in this mode only sends LLDPDUs.
z Rx mode. A port in this mode only receives LLDPDUs.
z Disable mode. A port in this mode does not send or receive LLDPDUs.
When the LLDP operating mode of a port changes, its LLDP protocol state machine re-initializes. To
prevent LLDP from being initialized too frequently during times of frequent operating mode change, you