HP 5120 EI Series User Manual

189
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
• 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.
1. Basic management TLVs
Table 23 list
s the basic management TLV types. Some of them are mandatory to LLDPDUs, that is,
must be included in every LLDPDU.
Table 23 Basic management TLVs
T
yp
e Descri
p
tion Remarks
Chassis ID Specifies the bridge MAC address of the sending device
Mandatory
Port ID
Specifies the ID of the sending port
If the LLDPDU carries LLDP-MED TLVs, the port ID TLV carries the
MAC address of the sending port. If the LLDPDU carries no
LLDP-MED TLVs, 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
Optional
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
Management Address
Specifies the management address, and the interface number and
object identifier (OID) associated with the address
2. IEEE 802.1 organizationally specific TLVs
Table 24 IEEE 802.1 organizationally specific TLVs
T
yp
e Descri
p
tion
Port VLAN ID
Specifies the port’s VLAN identifier (PVID). An LLDPDU carries only one TLV of
this type.
Port And Protocol VLAN ID
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.
VLAN Name
Specifies the textual name of any VLAN to which the port belongs. An LLDPDU
can carry multiple different TLVs of this type.

HP 5120 EI Series Specifications

General

Brand	HP
Model	5120 EI Series
Category	Switch
Language	English