Administrator Guide

protocol lldp
advertise dot1-tlv port-protocol-vlan-id port-vlan-id
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
no disable
R1(conf-lldp)#
Configuring the Time to Live Value
The information received from a neighbor expires after a specific amount of time (measured in seconds) called a time to live (TTL).
The TTL is the product of the LLDPDU transmit interval (hello) and an integer called a multiplier. The default multiplier is 4, which results in
a default TTL of 120 seconds.
• Adjust the TTL value.
CONFIGURATION mode or INTERFACE mode.
multiplier
• Return to the default multiplier value.
CONFIGURATION mode or INTERFACE mode.
no multiplier
R1(conf-lldp)#show config
!
protocol lldp
advertise dot1-tlv port-protocol-vlan-id port-vlan-id
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
no disable
R1(conf-lldp)#multiplier ?
<2-10> Multiplier (default=4)
R1(conf-lldp)#multiplier 5
R1(conf-lldp)#show config
!
protocol lldp
advertise dot1-tlv port-protocol-vlan-id port-vlan-id
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
multiplier 5
no disable
R1(conf-lldp)#no multiplier
R1(conf-lldp)#show config
!
protocol lldp
advertise dot1-tlv port-protocol-vlan-id port-vlan-id
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
no disable
R1(conf-lldp)#
Debugging LLDP
You can view the TLVs that your system is sending and receiving.
To view the TLVs, use the following commands.
• View a readable version of the TLVs.
debug lldp brief
• View a readable version of the TLVs plus a hexadecimal version of the entire LLDPDU, including unrecognized TLVs.
debug lldp detail
To stop viewing the LLDP TLVs sent and received by the system, use the no debug lldp command.
Link Layer Discovery Protocol (LLDP)
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