Chapter 6: Configuration through LLDP
LLDP overview
Link Layer Discovery Protocol (LLDP) is an open standards layer 2 protocol that IP deskphones use
to advertise their identity and capabilities and to receive administration from an LLDP server. LAN
equipment can use LLDP to manage power, administer VLANs, and provide some administration.
The transmission and reception of LLDP is specified in IEEE 802.1AB-2005. The 9600 Series IP
Deskphones use Type-Length-Value (TLV) elements specified in IEEE 802.1AB-2005, TIA TR-41
Committee - Media Endpoint Discovery (LLDP-MED, ANSI/TIA-1057), and Proprietary elements.
LLDP Data Units (LLDPDUs) are sent to the LLDP Multicast MAC address (01:80:c2:00:00:0e).
The 9600 Series IP Deskphones running SIP software support IEEE 802.1AB if the value of the
configuration parameter LLDP_ENABLED is "1" (On) or "2" (Auto). If the value of LLDP_ENABLED
is "0" (off), the transmission and reception of Link Layer Discovery Protocol (LLDP) is not supported.
When the value of LLDP_ENABLED is "2", the transmission of LLDP frames will not begin until or
unless an LLDP frame is received, and the first LLDP frame will be transmitted within 2 seconds
after the first LLDP frame is received. Once transmission begins, an LLDPDU will be transmitted
every 30 seconds. There could be a delay of up to 30 seconds in deskphone initialization if the file
server address is delivered by LLDP and not by DHCP.
These deskphones:
• Do not support LLDP on the secondary Ethernet interface.
• Will not forward frames received with the 802.1AB LLDP group multicast address as the
destination MAC address between the Ethernet line interface and the secondary Ethernet
interface.
The 9600 Series IP Deskphones initiates LLDP after receiving an LLDPDU message from an
appropriate system. Once initiated, the devices send an LLDPDU every 30 seconds with the
contents described in LLDPDU transmitted by the SIP devices.
August 2015 Administering Avaya 9601/9608/9611G/9621G/9641G/9641GS IP Deskphones SIP 67
Comments on this document? infodev@avaya.com
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