HP Compaq Presario,Presario 1910, User Manual

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LLDPDU TLVs include 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.
1. Basic management TLVs
Table 72 lists the basic management TLV types in use. Some of them must be included in every
LLDPDU.
Table 72 Basic LLDP TLVs
Type Description Remarks
Chassis ID Specifies the bridge MAC address of the sending device.
Mandatory
Port ID
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.
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 primary functions that have been enabled.
Management Address
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.
2. IEEE 802.1 organizationally specific TLVs
Table 73 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.
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.
Protocol Identity
Indicates protocols supported on the port. An LLDPDU can
carry multiple different TLVs of this type.
DCBX Data center bridging exchange protocol.