LLDP Compatibility• Spanning tree and force10 ring protocol “blocked” ports allow LLDPDUs.• 802.1X controlled ports do not allow LLDPDUs until the connected device is authenticated.CONFIGURATION versus INTERFACE ConfigurationsAll LLDP configuration commands are available in PROTOCOL LLDP mode, which is a sub-mode of the CONFIGURATION mode andINTERFACE mode.• Configurations made at the CONFIGURATION level are global; that is, they affect all interfaces on the system.• Configurations made at the INTERFACE level affect only the specific interface; they override CONFIGURATION level configurations.Example of the protocol lldp Command (CONFIGURATION Level)R1(conf)#protocol lldpR1(conf-lldp)#?advertise Advertise TLVsdisable Disable LLDP protocol globallyend Exit from configuration modeexit Exit from LLDP configuration modehello LLDP hello configurationmode LLDP mode configuration (default = rx and tx)multiplier LLDP multiplier configurationno Negate a command or set its defaultsshow Show LLDP configurationDell(conf-lldp)#exitDell(conf)#interface tengigabitethernet 1/3Dell(conf-if-te-1/3)#protocol lldpDell(conf-if-te-1/3-lldp)#?advertise Advertise TLVsdisable Disable LLDP protocol on this interfaceend Exit from configuration modeexit Exit from LLDP configuration modehello LLDP hello configurationmode LLDP mode configuration (default = rx and tx)multiplier LLDP multiplier configurationno Negate a command or set its defaultsshow Show LLDP configurationDell(conf-if-te-1/3-lldp)#Enabling LLDPLLDP is enabled by default. Enable and disable LLDP globally or per interface. If you enable LLDP globally, all UP interfaces send periodicLLDPDUs.To enable LLDP, use the following command.1 Enter Protocol LLDP mode.CONFIGURATION or INTERFACE modeprotocol lldp2 Enable LLDP.PROTOCOL LLDP modeno disable540 Link Layer Discovery Protocol (LLDP)
