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Link Layer Discovery Protocol (LLDP)
Link Layer Discovery Protocol (LLDP) defined by IEEE 802.1AB is a protocol that enables a local area network (LAN)
device to advertise its configuration and receive configuration information from adjacent LLDP-enabled LAN infrastructure
devices.
Topics:
802.1AB (LLDP) Overview
Optional TLVs
Configure LLDP
Enabling LLDP on Management Ports
Advertising TLVs
Storing and Viewing Unrecognized LLDP TLVs
Viewing the LLDP Configuration
Viewing Information Advertised by Adjacent LLDP Agents
Configuring LLDPDU Intervals
Configuring LLDP Notification Interval
Configuring Transmit and Receive Mode
Configuring a Time to Live
Debugging LLDP
Relevant Management Objects
802.1AB (LLDP) Overview
The collected information is stored in a management information base (MIB) on each device, and is accessible via simple
network management protocol (SNMP).
Protocol Data Units
Configuration information is exchanged in the form of Type, Length, Value (TLV) segments.
Type The information included in the TLV.
Length The value, in octets, of the TLV after the Length field.
Value The configuration information that the agent is advertising.
The chassis ID TLV is shown in the following illustration.
Figure 75. Type, Length, Value (TLV) Segment
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