Administering Telephone Options
120 Deskphone SIP 9608, 9611G, 9621G, 9641G Administrator Guide Release 6.0.1
The transmission and reception of LLDP is specified in IEEE 802.1AB-2005. The 9600 Series
IP Telephones 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).
9600 Series IP Telephones running SIP Release 2.0 and later 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.
Note:
Note:
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.
A 9600 Series IP Telephone initiates LLDP after receiving an LLDPDU message from an
appropriate system. Once initiated, the deskphones send an LLDPDU every 30 seconds with
the contents described in LLDPDU transmitted by SIP Deskphones
.
LLDPDU transmitted by SIP Deskphones
Category TLV Name (Type) TLV Info String (Value)
Basic Mandatory Chassis ID IPADD of deskphone, IANA Address Family
Numbers enumeration value for IPv4, or
subtype 5:Network address.
Basic Mandatory Port ID MAC address of the deskphone.
Basic Mandatory Time-To-Live 120 seconds.
Basic Optional System Name The Host Name sent to the DHCP server in
DHCP option 12.
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