243
Type Description
Network Policy
Allows a network device or terminal device to advertise the VLAN
ID of a port, the VLAN type, and the Layer 2 and Layer 3 priorities
for 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.
NOTE:
•
If the MAC/PHY configuration/status TLV is not advertisable, none of the LLDP-MED TLVs will be
advertised even if they are advertisable.
•
If the LLDP-MED capabilities TLV is not advertisable, the other LLDP-MED TLVs will not be advertised
even if they are advertisable.
Management address
The network management system uses the management address of a device to identify and manage the
device for topology maintenance and network management. The management address is encapsulated
in the management address TLV.
Working mechanism
LLDP operating modes
An LLDP agent can operate in one of the following modes:
•
TxRx mode
—An LLDP agent in this mode can send and receive LLDP frames.
•
Tx mode
—An LLDP agent in this mode can only send LLDP frames.
•
Rx mode
—An LLDP agent in this mode can only receive LLDP frames.
•
Disable mode
—An LLDP agent in this mode cannot send or receive LLDP frames.
Each time the LLDP operating mode of an LLDP agent changes, its LLDP protocol state machine
re-initializes. A configurable re-initialization delay prevents frequent initializations caused by frequent
changes to the operating mode. If you configure the re-initialization delay, an LLDP agent must wait for
the specified interval to initialize LLDP after the LLDP operating mode changes.