2.6.10 LLDP Command
LLDP stands for Link Layer Discovery Protocol and runs over data link layer. It is used for network
devices to send information about themselves to other directly connected devices on the network.
By using LLDP, two devices running different network layer protocols can learn information about
each other. A set of attributes are used to discover neighbor devices. These attributes contains
type, length, and value descriptions and are referred to as TLVs. Details such as port description,
system name, system description, system capabilities, and management address can be sent and
received on this Managed Switch. Use Spacebar to select “ON” if you would like to receive and
send the TLV.
Switch(config)# lldp
hold-time [1-3600]
Specify the amount of time in seconds. A receiving
device will keep the information sent by your
device for a period of time you specify here before
discarding it. The allowable hold-time value is
between 1 and 3600 seconds.
Switch(config)# lldp
interval [1-180]
Specify the time interval for updated LLDP packets
to be sent. The allowable interval value is between
1 and 180 seconds.
Switch(config)# lldp
packets [1-16]
Specify the amount of packets that are sent in
each discovery. The allowable packet value is
between 1 and 16 packets.
Switch(config)# lldp tlv-
select capability
Enable Capability attribute to be sent.
Switch(config)# lldp tlv-
select management-
address
Enable Management Address attribute to be sent.
Switch(config)# lldp tlv-
select port-description
Enable Port Description attribute to be sent.
Switch(config)# lldp tlv-
select system-
description
Enable System Description attribute to be sent.
Switch(config)# lldp tlv-
select system-name
Enable System Name attribute to be sent.
Switch(config)# no lldp hold-time
Reset the hold-time value back to the default. (120
seconds)
Switch(config)# no lldp interval
Reset the time interval value of sending updated
LLDP packets back to the default.(5 seconds)
Switch(config)# no lldp packets
Reset the amount of packets that are sent in each
discover back to the default.(1 packet)
Switch(config)# no lldp tlv-select
capability
Disable Capability attribute to be sent.
Switch(config)# no lldp tlv-select
management-address
Disable Management Address attribute to be sent.
Switch(config)# no lldp tlv-select port-
description
Disable Port Description attribute to be sent.
Switch(config)# no lldp tlv-select
system-description
Disable System Description attribute to be sent.
Switch(config)# no lldp tlv-select
system-name
Disable System Name attribute to be sent.
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