TLV Type Information
TLV that LLDP can encapsulate includes the basic TLV, organization-defined TLV and MED (Media Endpoint Discovery) TLV. Basic TLV is a group of TLV regarded as the basis of the network device management. Organization defined TLV and MED TLV is the TLV defined by the standard organization and other institutions, used to strengthen the management for the network devices. We can configure whether to release in LLDPDU according to the actual demand.
Basic TLV
In basic TLV, there are several types of TLV, which are mandatory for realizing the LLDP function, that is, should release in LLDPDU, as shown in the following table.
Table 7-1 Description of the basic TLV
|
TLV Type
|
Description
|
Whether to release
|
|
End of LLDPDU TLV
|
Indicate LLDPDU end
|
Yes
|
|
Chassis ID TLV
|
The MAC address of the sending device
|
Yes
|
|
Port ID TLV
|
Used to identify the port of the LLDPDU sending end; when the device does not send MED TLV, the content is the port name; when selecting to send MED TLV, the content is the MAC address of the port.
|
Yes
|
|
Time To Live TLV
|
The live time of the local device information on the neighbor device
|
Yes
|
|
Port Description TLV
|
The description character string
|
No
|
|
System Name TLV
|
The device name
|
No
|
|
System Description TLV
|
The system description
|
No
|
|
System Capabilities TLV
|
The main functions of the system and which functions can be enabled
|
No
|
|
Management Address TLV
|
Management address, and the corresponding interface number and OID (Object Identifier). The management address can be manually configured IP address; if not configured, select the master IP address of the management port of the device; if the management port is not configured, select the master IP address that the interface permits to pass VLAN; if any VLAN is not configured with the master IP address, the management address is empty. By default, send the TLV.
|
Yes
|
Organization-defined TLV
The organization-defined TLV includes the 802.1 organization-defined TLV and 802.3 organization-defined TLV, as shown in the following table.
Table 7-2 The description of 802.1 organization-defined TLV
|
TLV Type
|
Description
|
Whether to release
|
|
Port VLAN ID TLV
|
Port VLAN ID
|
No
|
|
Port And Protocol VLAN ID TLV
|
The protocol VLAN ID of the port
|
No
|
|
VLAN Name TLV
|
The port VLAN name
|
No
|
|
Protocol Identity TLV
|
The protocol type supported by the port. The local device does not support sending Protocol Identity TLV, but can receive the type of TLV.
|
No
|
Table 7-3 The description of the 802.3 organization-defined TLV
|
TLV Type
|
Description
|
Whether to release
|
|
MAC/PHY Configuration/Status TLV
|
The rate and duplex status of the port, whether to support the auto negotiation of the port rate, whether to enable the auto negotiation function, and the current rate and duplex status
|
No
|
|
Power Via MDI TLV
|
The power supply capability of the port
|
No
|
|
Link Aggregation TLV
|
Whether the port supports the link aggregation and whether to enable the link aggregation
|
No
|
|
Maximum Frame Size TLV
|
The supported maximum frame length, using the configured MTU of the port (Max Transmission Unit)
|
No
|
MED TLV
The MED TLV information is as shown in the following table.
Table 7-4 The description of MED TLV
|
TLV Type
|
Description
|
Whether to release
|
|
LLDP-MED Capabilities
|
The MED device type of the device and the LLDP
|
No
|
|
TLV
|
MED TLV type that can be encapsulated in LLDPDU
|
|
|
Network Policy TLV
|
The port VLAN ID, supported application (such as voice and video), application priority and used policy information
|
No
|
|
Extended Power-via-MDI TLV
|
The power supply capability of the device
|
No
|
|
Hardware Revision TLV
|
The hardware version of the device
|
No
|
|
Firmware Revision TLV
|
The firmware version of the device
|
No
|
|
Software Revision TLV
|
The software version of the device
|
No
|
|
Serial Number TLV
|
The serial number of the device
|
No
|
|
Manufacturer Name TLV
|
The manufacturer of the device
|
No
|
|
Model Name TLV
|
The module name of the device
|
No
|
|
Asset ID TLV
|
The asset ID of the device for directory management and asset tracking
|
No
|
|
Location Identification TLV
|
The location ID information of the connected device, used by the other devices in the application based on the location
|
No
|
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