Neighbor Discovery Overview
13-4 Configuring Neighbor Discovery
There are two primary LLDP-MED device types (as shown in Figure 13-2 on page 13-5):
• Network connectivity devices, which are LAN access devices such as LAN switch/routers,
bridges, repeaters, wireless access points, or any device that supports the IEEE 802.1AB and
MED extensions defined by the standard and can relay IEEE 802 frames via any method.
• Endpoint devices, which have three defined sub-types or classes:
– LLDP-MED Generic Endpoint (Class I) — All endpoint products that, while requiring the
base LLDP discovery services defined in the standard, do not support IP media or act as
an end-user communication device, such as IP communications controllers, other
communication-related servers, or any device requiring basic services. Discovery services
defined in this class include LAN configuration, device location, network policy, power
management, and inventory management.
– LLDP-MED Media Endpoint (Class II) — All endpoint products that have IP media
capabilities but that may not be associated with a particular end user, such as voice/media
gateways, conference bridges, and media servers. Capabilities include all of the
capabilities defined for Generic Endpoint (Class I) and are extended to include aspects
related to media streaming. Discovery services defined in this class include media type
specific network layer policy discovery.
– LLDP-MED Communication Endpoint (Class III) — All endpoint products that act as an
endpoint user communication device supporting IP media. Capabilities include all of the
capabilities defined for the Generic Endpoint (Class I) and Media Endpoint (Class II)
devices and are extended to include aspects related to end user devices, such as IP
phones, PC-based soft phones, and other communication devices that directly support the
end user.
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