Displaying the LLDP information about the neighboring devices in the form of a list is added in
V05.02.00P19 on the 3Com Switch 4500G. For details, please refer to the keyword list in the command
display lldp neighbor-information.
When configuring LLDP, go to these sections for information you are interested in:
LLDP Configuration Task List
Performing Basic LLDP Configuration
Configuring CDP Compatibility
Configuring LLDP Trapping
Displaying and Maintaining LLDP
LLDP Configuration Examples
In a heterogeneous network, it is important that different types of network devices from different vendors
can discover one other and exchange configuration for interoperability and management sake. This
calls for a standard configuration exchange platform.
To address the needs, the IETF drafted the Link Layer Discovery Protocol (LLDP) in IEEE 802.1AB. The
protocol operates on the data link layer to exchange device information between directly connected
devices. With LLDP, a device sends local device information (including its major functions,
management IP address, device ID, and port ID) as TLV (type, length, and value) triplets in LLDPDUs to
the directly connected devices, and at the same time, stores the device information received in
LLDPDUs sent from the LLDP neighbors in a standard management information base (MIB). It allows a
network management system to fast detect Layer-2 network topology change and identify what the
For more information about MIBs, refer to SNMP Configuration in the System Volume.