beautypg.com

Configuring a time to live, Debugging lldp – Dell PowerEdge FX2/FX2s User Manual

Page 223

background image

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

• View a readable version of the TLVs plus a hexadecimal version of the entire LLDPDU.

debug lldp detail

PMUX Mode of the IO Aggregator

223