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● 802.1X controlled ports do not allow LLDPDUs until the connected device is authenticated.
CONFIGURATION versus INTERFACE Configurations
All LLDP configuration commands are available in PROTOCOL LLDP mode, which is a sub-mode of the CONFIGURATION mode
and INTERFACE 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 lldp
R1(conf-lldp)#?
advertise Advertise TLVs
disable Disable LLDP protocol globally
end Exit from configuration mode
exit Exit from LLDP configuration mode
hello LLDP hello configuration
mode LLDP mode configuration (default = rx and tx)
multiplier LLDP multiplier configuration
no Negate a command or set its defaults
show Show LLDP configuration
DellEMC(conf-lldp)#exit
DellEMC(conf)#interface tengigabitethernet 1/3/1
DellEMC(conf-if-te-1/3/1)#protocol lldp
DellEMC(conf-if-te-1/3/1-lldp)#?
advertise Advertise TLVs
disable Disable LLDP protocol on this interface
end Exit from configuration mode
exit Exit from LLDP configuration mode
hello LLDP hello configuration
mode LLDP mode configuration (default = rx and tx)
multiplier LLDP multiplier configuration
no Negate a command or set its defaults
show Show LLDP configuration
DellEMC(conf-if-te-1/3/1-lldp)#
Enabling LLDP
LLDP is enabled by default. Enable and disable LLDP globally or per interface. If you enable LLDP globally, all UP interfaces send
periodic LLDPDUs.
To enable LLDP, use the following command.
1. Enter Protocol LLDP mode.
CONFIGURATION or INTERFACE mode
protocol lldp
2. Enable LLDP.
PROTOCOL LLDP mode
no disable
Disabling and Undoing LLDP
To disable or undo LLDP, use the following command.
● Disable LLDP globally or for an interface.
disable
To undo an LLDP configuration, precede the relevant command with the keyword no.
Link Layer Discovery Protocol (LLDP)
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