•Basic management TLVs

•Organizationally (IEEE 802.1 and IEEE 802.3) specific TLVs

•LLDP-MED (media endpoint discovery) TLVs

Basic management TLVs are essential to device management.

Organizationally specific TLVs and LLDP-MED TLVs are used for improved device management. They are defined by standardization or other organizations and are optional to LLDPDUs.

•Basic management TLVs

Table 71 lists the basic management TLV types. Some of them are mandatory for LLDPDUs. Table 71 Basic management TLVs

Type

Description

Remarks

Chassis ID

Specifies the bridge MAC address of the sending device.

 

 

 

 

 

Specifies the ID of the sending port.

 

 

• If the LLDPDU carries LLDP-MED TLVs, the port ID TLV

 

Port ID

carries the MAC address of the sending port or the

 

bridge MAC in case the port does not have a MAC

 

 

Mandatory.

 

address.

 

• Otherwise, the port ID TLV carries the port name.

 

 

 

 

Time to Live

Specifies the life of the transmitted information on the

 

receiving device.

 

 

 

 

 

 

End of LLDPDU

Marks the end of the TLV sequence in the LLDPDU.

 

 

 

 

Port Description

Specifies the port description of the sending port.

 

 

 

 

System Name

Specifies the assigned name of the sending device.

 

 

 

 

System Description

Specifies the description of the sending device.

 

 

 

 

System Capabilities

Identifies the primary functions of the sending device and

 

the enabled primary functions.

Optional.

 

 

Specifies the following elements:

 

 

• The management address used to reach higher level

 

Management Address

entities to assist discovery by network management.

 

•The interface number and OID associated with the address.

•IEEE 802.1 organizationally specific TLVs

Table 72 IEEE 802.1 organizationally specific TLVs

Type

Description

Port VLAN ID

Specifies the port's VLAN identifier (PVID). An LLDPDU carries only

one TLV of this type.

 

 

 

 

Indicates whether the device supports protocol VLANs and, if so,

Port And Protocol VLAN ID

what VLAN IDs these protocols will be associated with. An LLDPDU

 

can carry multiple different TLVs of this type.

 

 

VLAN Name

Specifies the textual name of any VLAN to which the port belongs.

An LLDPDU can carry multiple different TLVs of this type.

 

 

 

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