H3C S5500-SI Series, Operation Manual

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management. In addition, LLDP-MED TLVs make deploying voice devices in Ethernet easier.
LLDP-MED TLVs are shown in Table 1-6 :
Table 1-6 LLDP-MED TLVs
Type Description
LLDP-MED Capabilities
Allows a MED endpoint to advertise the supported LLDP-MED
TLVs and its device type.
Network Policy
Allows a network device or MED endpoint to advertise LAN type
and VLAN ID of the specific port, and the Layer 2 and Layer 3
priorities for a specific set of applications.
Extended Power-via-MDI
Allows a network device or MED endpoint to advertise
power-related information (according to IEEE 802.3AF).
Hardware Revision
Allows a MED endpoint device to advertise its hardware
version.
Firmware Revision Allows a MED endpoint to advertise its firmware version.
Software Revision Allows a MED endpoint to advertise its software version.
Serial Number
Allows an LLDP-MED endpoint device to advertise its serial
number.
Manufacturer Name Allows a MED endpoint to advertise its vendor name.
Model Name Allows a MED endpoint to advertise its model name.
Asset ID
Allows a MED endpoint 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.
Location Identification
Allows a network device to advertise the appropriate location
identifier information for an endpoint to use in the context of
location-based applications.
Management address
The management address of a device is used by the network management system to identify and
manage the device for topology maintenance and network management. The management address is
encapsulated in the management address TLV.
Operating Modes of LLDP
LLDP can operate in one of the following modes:
z
TxRx mode. A port in this mode sends and receives LLDP frames.
z
Tx mode. A port in this mode only sends LLDP frames.
z
Rx mode. A port in this mode only receives LLDP frames.
z
Disable mode. A port in this mode does not send or receive LLDP frames.
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 operating mode change, an
initialization delay, which is user configurable, is introduced. With this delay mechanism, a port must
wait for the specified interval before it can initialize LLDP after the LLDP operating mode changes.