LLDP (Link Layer Discovery Protocol) is a standardised protocol (IEEE 802.1AB) that network devices use to transmit information about themselves to neighbouring devices. This information can include, for example, the device name, port information, VLAN assignments and other important network parameters. LLDP is useful in many network infrastructures, especially for the administration and troubleshooting of networks. However, there are scenarios in which it makes sense to block LLDP messages and others in which this should not be done. LLDP messages should be blocked if: There are security concerns, the LLDP traffic has a negative impact on the network, unwanted connections are to be avoided or company guidelines require this. LLDP should remain activated if it is used for network management, automatic configuration or in secure, controlled networks.