Dell PowerEdge FX2/FX2s - Manual (Page 137)

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Link Layer Discovery Protocol (LLDP)
Link layer discovery protocol (LLDP) advertises connectivity and management from the local station to
the adjacent stations on an IEEE 802 LAN.
LLDP facilitates multi-vendor interoperability by using standard management tools to discover and make
available a physical topology for network management. The Dell Networking operating software
implementation of LLDP is based on IEEE standard 801.1ab.
The starting point for using LLDP is invoking LLDP with the protocol lldp command in either
CONFIGURATION or INTERFACE mode.
The information LLDP distributes is stored by its recipients in a standard management information base
(MIB). You can access the information by a network management system through a management
protocol such as simple network management protocol (SNMP).
An Aggregator auto-configures to support the link layer discovery protocol (LLDP) for the auto-discovery
of network devices. You can use CLI commands to display acquired LLDP information, clear LLDP
counters, and debug LACP operation.
Protocol Data Units
Configuration information is exchanged in the form of type, length, value (TLV) segments. The below
figure shows the chassis ID TLV.
• Type — Indicates the type of field that a part of the message represents.
• Length — Indicates the size of the value field (in byte).
• Value — Indicates the data for this part of the message.
Figure 19. Type, Length, Value (TLV) Segment
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