Configuring Basic LLDP Functions
After devices are configured with LLDP, the NMS can obtain network topology information, and information about the capabilities, management address, device ID, and interface ID of each device.
Usage Scenario
LLDP is used to obtain neighbor information and discover network topology. As shown in Figure 1, if the NMS needs to collect topology information about Device A and Device B, you can enable LLDP for Device A and Device B. Device A and Device B send packets encapsulated with status information to each other, allowing the NMS to obtain the topology information.
- Enabling LLDP
- When LLDP is enabled on a device, the device sends LLDP packets carrying its status information to its LLDP-capable neighbors and obtains their status information by receiving LLDP packets from them.
- (Optional) Configuring an LLDP Management IP Address
- This section describes how to configure an LLDP management IP address, so that an NMS can identify a device based on this management address to detect network topologies.
- (Optional) Configuring Types of TLVs Allowed to Be Advertised by LLDP
- During the process of exchanging Link Layer Discovery Protocol (LLDP) packets between devices, the LLDP data unit (LLDPDU) encapsulated in an LLDP packet carries different type-length-values (TLVs) as needed. A device sends its status information and receives neighbor status information based on these different TLVs.
- (Optional) Optimizing LLDP Performance
- This section describes how to adjust LLDP parameters based on the load of a network to reduce the consumption of system resources and optimize the LLDP performance.
- Verifying the Configuration of Basic LLDP Functions
- After configuring basic LLDP functions, verify the configuration.