Matrix SPARSH VP710, User Manual

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Matrix SPARSH VP710 User Guide 561
Linker Layer Discovery Protocol (LLDP)
LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which allows IP phone 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.
When LLDP feature is enabled, the IP phone advertise its own information periodically to the directly connected
LLDP-enabled switch.The IP phone may also receive LLDP packets from the connected switch. When the
application type is “voice”, the IP phone decides whether to update the VLAN configurations obtained from the
LLDP packets or not. If the VLAN configurations on the IP phone is different from the ones sent by the switch, the
IP phone performs an update and reboot. This allows the IP phone to plug into any switch, obtain their VLAN IDs,
and then start communication with the call control.
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 the IP phone to determine the capabilities that the connected switch
supports and has enabled.
• Network Policy -- provides voice VLAN configuration to notify the IP phone 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 IP phone are powered, power priority, and
how much power IP phone need.
• Inventory Management -- provides a means to effectively manage the IP phone 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 TLV Name Description
Mandatory TLVs
Chassis ID The network address of the IP phone.
Port ID The MAC address of the IP phone.
Time To Live Seconds until data unit expires.
End of LLDPDU Marks end of LLDPDU.