Type,TLV Name,Reference,Sub-TLV Registry
0,Reserved,[RFC9041],
1,Target FEC Stack,[RFC8029],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-1-16-21]
2,Downstream Mapping (DEPRECATED),[RFC8029],No Sub-TLVs
3,Pad,[RFC8029],No Sub-TLVs
4,LSR Capability,[RFC8611],No Sub-TLVs
5,Vendor Enterprise Number,[RFC8029],No Sub-TLVs
6,Detailed Interface and Label Stack,[RFC8611],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-6]
7,Interface and Label Stack,[RFC8029],No Sub-TLVs
8,Unassigned,,
9,Errored TLVs,[RFC8029],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-9]
10,Reply TOS Byte,[RFC8029],No Sub-TLVs
11,P2MP Responder Identifier,[RFC6425],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-11]
12,Echo Jitter,[RFC6425],No Sub-TLVs
13,Source ID,[RFC6426],No Sub-TLVs
14,Destination ID,[RFC6426],No Sub-TLVs
15,BFD Discriminator,[RFC5884],No Sub-TLVs
16,Reverse-path Target FEC Stack,[RFC6426],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-1-16-21]
17-19,Unassigned,,
20,Downstream Detailed Mapping,[RFC8029],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-20]
21,Reply Path,[RFC7110],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-1-16-21]
22,Reply TC,[RFC7110],No Sub-TLVs
23,Proxy Echo Parameters,[RFC7555],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-23]
24,Reply-to Address,[RFC7555],No Sub-TLVs
25,Upstream Neighbor Address,[RFC7555],No Sub-TLVs
26,Downstream Neighbor Address,[RFC7555],No Sub-TLVs
27,MPLS OAM Functions,[RFC7759],[https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-27]
28,EGRESS TLV (DEPRECATED),[RFC9655],No Sub-TLVs
29-16383,Unassigned,,
16384,BFD Reverse Path,[RFC9612],"Only non-multicast sub-TLVs (already defined or to be defined in the future) in the ""Sub-TLVs for TLV Types 1, 16, and 21"" registry at [https://www.iana.org/assignments/mpls-lsp-ping-parameters/mpls-lsp-ping-parameters.xml#sub-tlv-1-16-21]
      are permitted to be used in this field. Other sub-TLVs MUST NOT be used."
16385-31739,Unassigned,,
31740-31743,Reserved for Experimental Use,[RFC9041],"Not to be assigned. This range is for TLVs that require an error message if not recognized. [RFC9041, Section 3.1]"
31744-32767,Unassigned,,
32768,Relay Node Address Stack TLV,[RFC7743],No Sub-TLVs
32769,Time To Live,[RFC7394],No Sub-TLVs
32770,Reply Mode Order TLV,[RFC7737],No Sub-TLVs
32771,Egress TLV,[RFC9655],No Sub-TLVs
32772-64507,Unassigned,,
64508-64511,Reserved for Experimental Use,[RFC9041],Not to be assigned. This range is for TLVs that can be silently dropped if not recognized.
64512-65535,Unassigned,,