HP A6600 Configuration Manual page 208

TLVs
TLVs are type, length, and value sequences that carry information elements. The type field identifies the
type of information, the length field measures 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 25 lists the basic management TLV types in use. Some of them must be included in every LLDPDU.
Table 25 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 26 IEEE 802.1 organizationally specific TLVs
Type
Port VLAN ID
Port And Protocol VLAN ID
VLAN Name
Protocol Identity
HP routers only support receiving protocol identity TLVs.
Description
Bridge MAC address of the sending device
ID of the sending port
If the LLDPDU carries LLDP-MED TLVs, 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 the LLDPDU carries no
LLDP-MED TLVs, the port ID TLV carries the port name.
Life of the transmitted information on the receiving device
Marks the end of the TLV sequence in the LLDPDU
Port description of the sending port
Assigned name of the sending device
Description of the sending device
Identifies the primary functions of the sending device and the
enabled primary functions
Management address, and the interface number and OID
associated with the address
Description
Port's VLAN identifier. An LLDPDU carries only one TLV of this type.
Indicates whether the device supports protocol VLANs and, if so, with which
VLAN IDs these protocols are associated. An LLDPDU can carry multiple
different TLVs of this type.
Textual name of any VLAN to which the port belongs. An LLDPDU can carry
multiple different TLVs of this type.
Indicates protocols supported on the port. An LLDPDU can carry multiple
different TLVs of this type.
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Remarks
Mandatory
Optional