Configuration through LLDP
Link Layer Discovery Protocol (LLDP) is an open standards, layer 2 protocol that IP phones use to
advertise their identity and capabilities and to receive administration from Ethernet switches. LAN
equipment can use LLDP to manage power and administer VLANs, DSCP, and 802.1p priority
fields.
The transmission and reception of LLDP is specified in IEEE 802.1AB-2005. The Avaya J100
Series IP Phones 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.
The Avaya J100 Series IP Phones 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 does not begin until an LLDP frame is received. The first LLDP frame is transmitted within
2 seconds after the first LLDP frame is received. After transmission begins, an LLDPDU is
transmitted every 30 seconds. A delay of up to 30 seconds in phone initialization might occur if the
file server address is delivered by LLDP and not by DHCP.
These phones do not transmit 802.1AB multicast LLDP packets from an Ethernet line interface to
the secondary line interface and vice versa.
By using LLDP, you can configure the following:
• Call server IP address
• File server
• PHY2VLAN
• L2QVLAN and L2Q
• DSCP
• 802.1p priority
LLDPDU transmitted by the phones
Category
TLV Name (Type)
TLV Info String (Value)
Basic Mandatory
Chassis ID
IPADD of phone, IANA Address Family Numbers enumeration
value for IPv4, or subtype 5:Network address.
Basic Mandatory
Port ID
MAC address of the device.
Basic Mandatory
Time-To-Live
120 seconds.
Basic Optional
System Name
The Host Name sent to the DHCP server in DHCP option 12.
Table continues…
Servers, VLAN, and IP configuration
April 2020
Installing and Administering Avaya J100 series IP Phones in an Open SIP
environment
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