• Bit 13—10BASE-T half duplex mode
• Bit 14—10BASE-T full duplex mode
• Bit 11—100BASE-TX half duplex mode
• Bit 10—100BASE-TX full duplex mode
• Bit 15—Unknown
Bit 10, 11, 13 and 14 should be set.
The value for 2 octets operational MAU type should be set to reflect the real operational MAU type:
• 16—100BASE-TX full duplex
• 15—100BASE-TX half duplex
• 11—10BASE-T full duplex
• 10—10BASE-T half duplex
For example, usually, the phone is set to 100BASE-TX full duplex. The value 16 should then be set. The TLV
is optional for a wired network and not applicable for a wireless network. The phone sends out this TLV only
when in wired mode. When the phone is not set for autonegotiation but specific speed/duplexity, for the
outgoing LLDPDU TLV, bit 1 for the octet value autonegotiation support/status should be clear (0) to indicate
that autonegotiation is disabled. The 2 octets PMD autonegotiation advertised capability field should be set
to 0x8000 to indicate unknown.
LLDP-MED Capabilities TLV
For the outgoing LLDPDU, the TLV should have the device type 3 (End Point Class III) with the following
bits set for 2-octet Capability field:
CapabilityBit Position
LLDP-MED Capabilities0
Network Policy1
Extended Power via MDI-PD4
Inventory5
For the incoming TLV, if the LLDP-MED TLV is not present, the LLDPDU is discarded. The LLDP-MED
Capabilities TLV is mandatory and only one is allowed for the outgoing and incoming LLDPDUs. Any other
LLDP-MED TLVs will be ignored if they present before the LLDP-MED Capabilities TLV.
Network Policy TLV
In the TLV for the outgoing LLDPDU, before the VLAN or DSCP is determined, the Unknown Policy Flag
(U) is set to 1. If the VLAN setting or DSCP is known, the value is set to 0. When the policy is unknown, all
other values are set to 0. Before the VLAN is determined or used, the Tagged Flag (T) is set to 0. If the tagged
VLAN (VLAN ID > 1) is used for the phone, the Tagged Flag (T) is set to 1. Reserved (X) is always set to
0. If the VLAN is used, the corresponding VLAN ID and L2 Priority will be set accordingly. VLAN ID valid
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
62
Phone Installation
LLDP-MED Capabilities TLV
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