How Lldp Works - HP A5120 EI Series Configuration Manual

Table 26 LLDP-MED TLVs
Type
LLDP-MED Capabilities
Network Policy
Extended Power-via-MDI
Hardware Revision
Firmware Revision
Software Revision
Serial Number
Manufacturer Name
Model Name
Asset ID
Location Identification
Management address
The network management system uses the management address of a device to identify and manage the
device for topology maintenance and network management. The management address TLV encapsulates
the management address.

How LLDP works

Operating modes of LLDP
LLDP can operate in one of the following modes:
TxRx mode. A port in this mode sends and receives LLDPDUs.

Tx mode. A port in this mode only sends LLDPDUs.

Rx mode. A port in this mode only receives LLDPDUs.

Disable mode. A port in this mode does not send or receive LLDPDUs.

Each time the LLDP operating mode of a port changes, its LLDP protocol state machine re-initializes. To
prevent LLDP from being initialized too frequently at times of frequent changes to the operating mode, you
can configure a re-initialization delay. With this delay configured, before a port can initialize LLDP, it must
wait for the specified interval after the LLDP operating mode changes.
Transmitting LLDPDUs
An LLDP-enabled port operating in TxRx mode or Tx mode sends LLDPDUs to its directly connected
devices both periodically and when the local configuration changes. To prevent LLDPDUs from
Description
Allows a network device to advertise the LLDP-MED TLVs that it
supports
Allows a network device or terminal device to advertise the VLAN ID
of the specific port, the VLAN type, and the Layer 2 priorities for
specific applications
Allows a network device or terminal device to advertise power
supply capability. This TLV is an extension of the Power Via MDI
TLV.
Allows a terminal device to advertise its hardware version
Allows a terminal device to advertise its firmware version
Allows a terminal device to advertise its software version
Allows a terminal device to advertise its serial number
Allows a terminal device to advertise its vendor name
Allows a terminal device to advertise its model name
Allows a terminal device to advertise its asset ID. The typical case is
that the user specifies the asset ID for the endpoint to facilitate
directory management and asset tracking.
Allows a network device to advertise the appropriate location
identifier information for a terminal device to use in the context of
location-based applications
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