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LLDP-MED Network Connectivity Devices, as defined in TIA-1057, provide access to the
IEEE 802 based LAN infrastructure for LLDP-MED Endpoint Devices. An LLDP-MED
Network Connectivity Device is a LAN access device based on any of the following
technologies:
1. LAN Switch/Router
2. IEEE 802.1 Bridge
3. IEEE 802.3 Repeater (included for historical reasons)
4. IEEE 802.11 Wireless Access Point
5. Any device that supports the IEEE 802.1AB and MED extensions defined by TIA-1057
and can relay IEEE 802 frames via any method.
LLDP-MED Endpoint Device Definition :
LLDP-MED Endpoint Devices, as defined in TIA-1057, are located at the IEEE 802 LAN
network edge, and participate in IP communication service using the LLDP-MED
framework.
Within the LLDP-MED Endpoint Device category, the LLDP-MED scheme is broken into
further Endpoint Device Classes, as defined in the following.
Each LLDP-MED Endpoint Device Class builds upon the capabilities defined for the
previous Endpoint Device Class. For example, any LLDP-MED Endpoint Device claiming
compliance as a Media Endpoint (Class II) will also support all aspects of TIA-1057
applicable to Generic Endpoints (Class I), and any LLDP-MED Endpoint Device claiming
compliance as a Communication Device (Class III) will also support all aspects of TIA-1057
applicable to both Media Endpoints (Class II) and Generic Endpoints (Class I).
LLDP-MED Generic Endpoint (Class I) :
The LLDP-MED Generic Endpoint (Class I) definition is applicable to all endpoint products
that require the base LLDP discovery services defined in TIA-1057, however, it does not
support IP media or act as an end-user communication appliance. Such devices may
include (but are not limited to) IP Communication Controllers, other communication related
servers, or any device requiring basic services as defined in TIA-1057.
Discovery services defined in this class include LAN configuration, device location, network
policy, power management, and inventory management.
LLDP-MED Media Endpoint (Class II) :
The LLDP-MED Media Endpoint (Class II) definition is applicable to all endpoint products
that have IP media capabilities, however, may or may not be associated with a particular
end user. Capabilities include all of the capabilities defined for the previous Generic
Endpoint Class (Class I), and are extended to include aspects related to media streaming.
Example product categories expected to adhere to this class include (but are not limited to)
Voice / Media Gateways, Conference Bridges, Media Servers, and similar devices.
Discovery services defined in this class include media-type-specific network layer policy
discovery.
LLDP-MED Communication Endpoint (Class III) :
The LLDP-MED Communication Endpoint (Class III) definition is applicable to all endpoint
products that act as end user communication appliances supporting IP media. Capabilities
include all of the capabilities defined for the previous Generic Endpoint (Class I) and Media
Endpoint (Class II) classes, and are extended to include aspects related to end user
devices. Example product categories expected to adhere to this class include (but are not
limited to) end user communication appliances, such as IP Phones, PC-based softphones,
or other communication appliances that directly support the end user.
Discovery services defined in this class include provision of location identifier (including
ECS / E911 information), embedded L2 switch support, and inventory management.
LLDP-MED Capabilities :
LLDP-MED Capabilities describes the neighbor unit's LLDP-MED capabilities. The possible
capabilities are:
1. LLDP-MED capabilities