Users Guide

There are ve types of TLVs (as shown in the below table). All types are mandatory in the construction of an LLDPDU except
Optional TLVs. You can congure the inclusion of individual Optional TLVs.
Table 12. Type, Length, Value (TLV) Types
Type TLV Description
0
End of LLDPDU Marks the end of an LLDPDU.
1
Chassis ID The Chassis ID TLV is a mandatory TLV that identies the chassis containing the
IEEE 802 LAN station associated with the transmitting LLDP agent.
2
Port ID The Port ID TLV is a mandatory TLV that identies the port component of the
MSAP identier associated with the transmitting LLDP agent.
3
Time to Live The Time To Live TLV indicates the number of seconds that the recipient LLDP
agent considers the information associated with this MSAP identier to be valid.
—
Optional Includes sub-types of TLVs that advertise specic conguration information. These
sub-types are Management TLVs, IEEE 802.1, IEEE 802.3, and TIA-1057
Organizationally Specic TLVs.
Figure 21. LLDPDU Frame
Congure LLDP
Conguring LLDP is a two-step process.
1. Enable LLDP globally.
2. Advertise TLVs out of an interface.
Related Conguration Tasks
• Viewing the LLDP Conguration
• Viewing Information Advertised by Adjacent LLDP Agents
• Conguring LLDPDU Intervals
• Conguring a Time to Live
• Debugging LLDP
Important Points to Remember
• LLDP is enabled by default.
• Dell Networking systems support up to eight neighbors per interface.
• Dell Networking systems support a maximum of 8000 total neighbors per system. If the number of interfaces multiplied by eight
exceeds the maximum, the system does not congure more than 8000.
• INTERFACE level congurations override all CONFIGURATION level congurations.
• LLDP is not hitless.
Link Layer Discovery Protocol (LLDP)
141