Yealink CPE80, Administrator'S Manual

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Configuring Network
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LLDP
LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which allows the
endpoint to receive and/or transmit device-related information from/to directly connected
devices on the network that are also using the protocol, and store the information about other
devices. LLDP transmits information as packets called LLDP Data Units (LLDPDUs). An LLDPDU
consists of a set of Type-Length-Value (TLV) elements, each of which contains a particular type
of information about the device or port transmitting it.
LLDP-MED (Media Endpoint Discovery)
LLDP-MED is published by the Telecommunications Industry Association (TIA). It is an extension
to LLDP that operates between endpoint devices and network connectivity devices. LLDP-MED
provides the following capabilities for the endpoint:

Capabilities Discovery -- allows LLDP-MED endpoint to determine the capabilities that the
connected switch supports and has enabled.

Network Policy -- provides voice VLAN configuration to notify the endpoint which VLAN to
use and QoS-related configuration for voice data. It provides a “plug and play” network
environment.

Power Management -- provides information related to how the endpoint is powered,
power priority, and how much power the endpoint needs.

Inventory Management -- provides a means to effectively manage the endpoint and its
attributes, such as model number, serial number and software revision.
TLVs supported by the endpoint are summarized in the following table:
TLV Type TLV Name Description
Mandatory TLVs
Chassis ID The network address of the endpoint.
Port ID The MAC address of the endpoint.
Time To Live
Seconds until data unit expires.
The default value is 180s.
End of LLDPDU Marks end of LLDPDU.
Optional TLVs
System Name
Name assigned to the endpoint.
The default value is “VC110”.
System Description
Description of the endpoint.
Description includes firmware version of the
endpoint.
System Capabilities
The supported and enabled endpoint
capabilities.
The Telephone capability is supported and