Lldp - Yealink SIP-T2XP Administrator's Manual

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LLDP

LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which
allows IP phones to receive and/or transmit device-related information to directly
connected devices on the network that are also using the protocol, and store the
information that is learned 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
the 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 specifically provides support for voice over IP (VoIP) applications
and provides the following capabilities:
Capabilities Discovery -- allows IP phones to determine the capabilities that the

connected switch supports and has enabled.
Network Policy -- provides voice VLAN configuration to notify IP phones 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 IP phones are

powered, power priority, and how much power IP phones need.
Inventory Management -- provides a means to effectively manage IP phones and

their attributes such as model number, serial number and software revision.
TLVs supported by IP phones are summarized in the following table:
TLV Type
Mandatory TLVs
Features
Web User Interface
TLV Name
Chassis ID
Port ID
Time To Live
End of LLDPDU
Configuring Advanced
Configure the transport type on
the IP phone.
Navigate to:
http://<phoneIPAddress>/servl
et?p=account-register&q=load
&acc=0
Description
The network address of the IP phone.
The MAC address of the IP phone.
Seconds until data unit expires.
The default value is 60s.
Marks end of LLDPDU.
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