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Link Layer Discovery Protocol (LLDP)

Release 2.6+ 4600 Series IP Telephones support IEEE 802.1AB. Link Layer Discovery Protocol (LLDP) is an open standards layer 2 protocol IP telephones 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 4600 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).

A 4600 Series IP Telephone initiates LLDP after receiving an LLDPDU message from an appropriate system. Once initiated, the telephones send an LLDPDU every 30 seconds with the following contents:

Table 8:  LLDPDU Transmitted by the 4600 Series IP Telephones  
Category
TLV Name (Type)
TLV Info String (Value)
Basic Mandatory
Chassis ID
IPv4 IP Address of telephone.
Basic Mandatory
Port ID
MAC address of the telephone.
Basic Mandatory
Time-To-Live
120 seconds.
Basic Optional
System Name
The Host Name sent to the DHCP server in DHCP option 12.
Basic Optional
System Capabilities
Bit 2 (Bridge) will be set in the System Capabilities if the telephone has an internal Ethernet switch. If Bit 2 is set in Enabled Capabilities then the secondary port is enabled.
Bit 5 (Telephone) will be set in the System Capabilities. If Bit 5 is set in the Enabled Capabilities than the telephone is registered.
Basic Optional
Management Address
Mgmt IPv4 IP Address of telephone.

Interface number subtype = 3 (system port). Interface number = 1.

OID = SNMP MIB-II sysObjectID of the telephone.
IEEE 802.3 Organization Specific
MAC / PHY Configuration / Status
Reports autonegotiation status and speed of the uplink port on the telephone.
TIA LLDP MED
LLDP-MED Capabilities
Media Endpoint Discovery - Class III - IP Telephone.
TIA LLDP MED
Network Policy
Tagging Yes/No, VLAN ID for voice, L2 Priority, DSCP Value.
TIA LLDP MED
Inventory – Hardware Revision
MODEL - Full Model Name.
TIA LLDP MED
Inventory – Firmware Revision
BOOTNAME.
TIA LLDP MED
Inventory – Software Revision
APPNAME.
TIA LLDP MED
Inventory – Serial Number
Telephone serial number.
TIA LLDP MED
Inventory – Manufacturer Name
Avaya.
TIA LLDP MED
Inventory – Model Name
MODEL4 - 4 character name.
Avaya Proprietary
PoE Conservation Level Support
Provides Power Conservation abilities/settings, Typical and Maximum Power values.

OUI = 00-40-0D (hex), Subtype = 1.
Avaya Proprietary
Call Server IP Address
Call Server IP Address.

Subtype = 3.
Avaya Proprietary
IP Phone Addresses
Phone IP Address, Phone Address Mask, Gateway IP Address.

Subtype = 4.
Avaya Proprietary
CNA Server IP Address
CNA Server IP Address = in-use value from CNASRVR.

Subtype = 5.
Avaya Proprietary
File Server
File Server IP Address.

Subtype = 6.
Avaya Proprietary
802.1Q Framing
802.1Q Framing = 1 if tagging or 2 if not.

Subtype = 7.
Basic Mandatory
End-of-LLDPDU
Not applicable.

On receipt of a LLDPDU message the Avaya IP Telephones will act on these Type-Length-Value (TLV) elements.

Table 9:  Impact of TLVs on System Parameter Values 
System Parameter Name
TLV
Name

Impact
PHY2VLAN
IEEE 802.1 Port VLAN ID
System value changed to the Port VLAN identifier in the TLV.
L2QVLAN and L2Q
IEEE 802.1 VLAN Name
The system value is changed to the TLV VLAN Identifier. L2Q will be set to 1 (ON).

VLAN Name TLV is only effective if:
  • The telephone is not statically programmed.
  • The telephone is not registered with the Call Server.
  • Name begins with VOICE (case does not matter).
  • The VLAN is not zero.
If VLAN Name causes the telephone to change VLAN and the telephone already has an IP Address, the telephone will release the IP Address and send out a new DHCPDISCOVER on the new VLAN ID.
MCIPADD
Proprietary Call Server TLV
MCIPADD will be set to this value if it has not already been set.
TLSSRVR, HTTPSRVR and TFTPSRVR
Proprietary File Server TLV
TLSSRVR, HTTPSRVR and TFTPSRVR will be set to this value if none of them have already been set.
L2Q
Proprietary 802.1Q Framing
The default L2Q is set to the value of this TLV. No change is made to the current L2 tagging, but the new default value is used on the next reboot.

Proprietary - PoE Conservation TLV
This proprietary TLV can initiate a power conservation mode. The telephones that support this will turn on/off the telephone backlight and the backlight of an attached EU24BL Button Module in response to this TLV.

These telephones:


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