Licensing Requirements and Limitations for LLDP

Other network elements are not required.

LLDP is a basic feature of a switch and is not under License control.

All models of S2720, S5700, and S6700 series switches support LLDP.

For details about software mappings, visit Hardware Query Tool and search for the desired product model.

By default, the device limits the rate of LLDP packets sent to the CPU. If the rate of LLDP packets received from a neighbor within a short period exceeds the default CIR value, the device discards the excess LLDP packets. As a result, the LLDP neighbor relationship cannot be set up. The number of LLDP packets processed by the device per second is (CIR for LLDP packets/Length of each LLDP packet). The LLDP packet length varies according to the type of device sending the LLDP packets. You can modify the CIR for LLDP packets according to the number of neighbors and rate of LLDP packets sent by the neighbors.
If the CPCAR values are adjusted improperly, network services are affected. To adjust the CPCAR values of LLDP packets, contact technical support personnel.