1-4
Type
Description
Remarks
Port ID
ID of the sending port.
If 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
MED TLVs are included, the port ID TLV carries the port
name.
Time To Live
Life of the transmitted information on the receiving device.
End of LLDPDU
Marks the end of the TLV sequence in the LLDPDU.
Port Description
Port description of the sending port.
System Name
Assigned name of the sending device.
System Description
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
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.
Optional
2) IEEE 802.1 organizationally specific TLVs
Table 1-4
IEEE 802.1 organizationally specific TLVs
Type
Description
Port VLAN ID
PVID of the sending port
Port And Protocol VLAN ID
Port and protocol VLAN IDs
VLAN Name
A specific VLAN name on the port
Protocol Identity
Protocols supported on the port
Currently, Switches 4500G support receiving but not sending protocol identity TLVs.
3) IEEE 802.3 organizationally specific TLVs
Table 1-5
IEEE 802.3 organizationally specific TLVs
Type
Description
MAC/PHY Configuration/Status
Contains the rate and duplex capabilities of the sending port,
support for auto negotiation, enabling status of auto
negotiation, and the current rate and duplex mode.
Power Via MDI
Contains Power supply capability of the port.
Link Aggregation
Indicates the support of the port for link aggregation, the
aggregation capability of the port, and the aggregation status
(that is, whether the link is in an aggregation).
