Configuring a Time to Live
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
Example of the multiplier Command to Configure Time to Live
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
Link Layer Discovery Protocol (LLDP) 549