API Guide

Mandatory TLVs
OS10 supports the three mandatory TLVs. These mandatory TLVs are at the beginning of the LLDPDU in the following order:
● Chassis ID TLV
● Port ID TLV
● Time-to-live TLV
Table 58. Mandatory TLVs
Mandatory TLVs Type Description
Chassis ID 1 Identifies the chassis.
Port ID 2 Identifies a port through which the LAN
device transmits LLDPDUs.
Time-to-live 3 Number of seconds that the received
information in this LLDPDU is valid.
End of LLDPDU 0 Marks the end of an LLDPDU.
Optional TLVs
Optional TLVs include:
● Basic TLVs
● Organizationally specific TLVs
● Custom TLVs
NOTE:
The maximum size of the LLDPDUs supported on the transmission side is 1500 bytes. If the size of the TLVs that
are transmitted exceeds 1500 bytes when adding one optional TLV of a particular type, the complete optional TLVs of that
type are removed and only the optional TLVs that fit the maximum supported size are allowed.
Basic TLVs
Table 59. Basic TLVs
TLV Type Description
Port description 4 User-defined alphanumeric string that
describes the port (port ID or interface
description).
Layer 2 433