Configuring Poe Negotiation With Link Layer Discovery Protocol (Lldp) - Allied Telesis TQ6000 GEN2 Series Management Software User Manual

Configuring PoE Negotiation with Link Layer Discovery Protocol
(LLDP)
This feature is applicable when the access point is powered by Power over
Ethernet (PoE) and the LAN1 port is connected to a network device that
supports LLDP Media Endpoint Devices (LLDP-MED).
LLDP and LLDP-MED allow Ethernet network devices to receive and/or
transmit device-related information from/to directly connected devices on
the network that are also using the protocols, and to store the information
that is learned about other devices. The shared data allows network
devices to discover other devices directly connected to them as well as
advertise parts of their Layer 2 configuration to each other.
LLDP is a "one" hop" protocol; LLDP information can only be sent to and
received by devices that are directly connected to each other, or
connected via a hub or repeater. Devices that are directly connected to
each other are called neighbors. Advertised information is not forwarded
on to other devices on the network because LLDP is a on-way protocol.
That is, the information transmitted in LLDP advertisements flows in one
direction only, from one device to its neighbors.
LLDP transmits information in packets called LLDP Data Units
(LLDPDUs). An LLDPDU consists of a set of Type-Length-Value elements
(TLV), each containing a particular type of information about the device or
port transmitting it.
The Extended Power Management TLV in LLDP-MED is for powered
devices like the access point. They use it to send their power requirements
to their PoE sources, which in turn, store the information or use it to adjust
the power supplied to the access point.
Here are guidelines for PoE negotiation with LLDP:
The access point must be powered with PoE.

The LAN1 port must be connected to an LLDP-Med device.

The LLDP-MED device must be configured for the Extended Power

Management TLV.
This feature is optional. The access point can be powered by PoE

without enabling this feature.
To enable or disable the Reset button, perform the following procedure:
1. Select Settings > System from the main menu.
2. Select LLDP from the sub-menu. Refer to Figure 19 on page 66.
Chapter 3: System Settings
65