HP 1910 User Manual page 245

TLVs
TLVs are type, length, and value sequences that carry information elements, where the type field identifies
the type of information, the length field indicates the length of the information field in octets, and the
value field contains the information itself.
LLDPDU TLVs fall into the following categories: basic management TLVs, organizationally (IEEE 802.1
and IEEE 802.3) specific TLVs, and LLDP-MED (media endpoint discovery) TLVs. Basic management TLVs
are essential to device management. Organizationally specific TLVs and LLDP-MED TLVs are used for
enhanced device management; they are defined by standardization or other organizations and are
optional to LLDPDUs.
Basic management TLVs
1.
Table 73
LLDPDU.
Table 73 Basic LLDP TLVs
Type
Chassis ID
Port ID
Time to Live
End of LLDPDU
Port Description
System Name
System Description
System Capabilities
Management Address
IEEE 802.1 organizationally specific TLVs
2.
Table 74 IEEE 802.1 organizationally specific TLVs
Type
Port VLAN ID
Port And Protocol VLAN ID
lists the basic management TLV types in use. Some of them must be included in every
Description
Specifies the bridge MAC address of the sending device.
Specifies the ID of the sending port.
If LLDP-MED TLVs are included in the LLDPDU, the port ID TLV
carries the MAC address of the sending port or the bridge
MAC in case the port does not have a MAC address. If no
LLDP-MED TLVs are included, the port ID TLV carries the port
name.
Specifies the life of the transmitted information on the
receiving device.
Marks the end of the TLV sequence in the LLDPDU.
Specifies the port description of the sending port.
Specifies the assigned name of the sending device.
Specifies the description of the sending device.
Identifies the primary functions of the sending device and the
primary functions that have been enabled.
Specifies the management address used to reach higher level
entities to assist discovery by network management, and the
interface number and OID (object identifier) associated with
the address.
Description
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,
what VLAN IDs these protocols will be associated with. An
LLDPDU can carry multiple different TLVs of this type.
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Remarks
Mandatory
Optional