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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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Configuring a Time to Live<br />

The in<strong>for</strong>mation received from a neighbor expires after a specific amount of time (measured in seconds)<br />

called a Time to Live (TTL). The TTL is <strong>the</strong> product of <strong>the</strong> LLDPDU transmit interval (hello) and an<br />

integer called a multiplier. The default multiplier is 4, which results in a default TTL of 120 seconds.<br />

Adjust <strong>the</strong> TTL value—at CONFIGURATION level or INTERFACE level—using <strong>the</strong> command<br />

multiplier. Return to <strong>the</strong> default multiplier value using <strong>the</strong> command no multiplier (Figure 199).<br />

Figure 199 Configuring LLDPDU Time to Live<br />

R1(conf-lldp)#show config<br />

!<br />

protocol lldp<br />

advertise dot1-tlv port-protocol-vlan-id port-vlan-id<br />

advertise dot3-tlv max-frame-size<br />

advertise management-tlv system-capabilities system-description<br />

no disable<br />

R1(conf-lldp)#multiplier ?<br />

Multiplier (default=4)<br />

R1(conf-lldp)#multiplier 5<br />

R1(conf-lldp)#show config<br />

!<br />

protocol lldp<br />

advertise dot1-tlv port-protocol-vlan-id port-vlan-id<br />

advertise dot3-tlv max-frame-size<br />

advertise management-tlv system-capabilities system-description<br />

multiplier 5<br />

no disable<br />

R1(conf-lldp)#no multiplier<br />

R1(conf-lldp)#show config<br />

!<br />

protocol lldp<br />

advertise dot1-tlv port-protocol-vlan-id port-vlan-id<br />

advertise dot3-tlv max-frame-size<br />

advertise management-tlv system-capabilities system-description<br />

no disable<br />

R1(conf-lldp)#<br />

Debugging LLDP<br />

The command debug lldp enables you to view <strong>the</strong> TLVs that your system is sending and receiving.<br />

• Use <strong>the</strong> debug lldp brief command to view a readable version of <strong>the</strong> TLVs.<br />

• Use <strong>the</strong> debug lldp detail command to view a readable version of <strong>the</strong> TLVs plus a hexadecimal<br />

version of <strong>the</strong> entire LLDPDU.<br />

298 Link Layer Discovery Protocol

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