RFC 8029 change changed the registration procedures for TLV and sub-TLV
   registries for LSP Ping.

   IANA has created a new "Sub-TLVs for TLV Type 6" subregistry under
   the "TLVs" registry of the "Multiprotocol Label Switching (MPLS)
   Label Switched Paths (LSPs) Ping Parameters" registry
   [IANA-MPLS-LSP-PING].

   This registry conforms with RFC 8029.

   The registration procedures for this sub-TLV registry are. are:

   Range        Registration Procedure   Note
   -----        ----------------------   -----
   0-16383      Standards Action         This range is for mandatory
                                         TLVs or for optional TLVs that
                                         require an error message if
                                         not recognized.
   16384-31743  RFC Required             This range is for mandatory
                                         TLVs or for optional TLVs that
                                         require an error message if
                                         not recognized.
   31744-32767  Private Use              Not to be allocated assigned
   32768-49161  Standards Action         This range is for optional TLVs
                                         that can be silently dropped if
                                         not recognized.
   49162-64511  RFC Required             This range is for optional TLVs
                                         that can be silently dropped if
                                         not recognized.
   64512-65535  Private Use              Not to be allocated assigned

   The in intial initial allocations for this registry is: are:

 Sub-Type     Sub-TLV Name             Reference Comment
 --------     ------------             --------- -------
 0            Reserved                 RFC 8611
 1            Incoming Label Stack     RFC 8611
 2            Incoming Interface Index RFC 8611
 3-31743      Unassigned
 31744-32767                           RFC 8611 Reserved for Private Use
 32768-64511  Unassigned
 64511-65535                           RFC 8611 Reserved for Private Use

   Note: IETF does not prescribed prescribe how the Private USE Use sub-TLVs are handled,
however
   handled; however, if a sub-TLV from the a Private Use ever would be range is received but
   by an LSR that does not recognize it it, an error message MAY be
   returned if it is
form from the range 31744-32767, and it SHOULD be
   silently dropped if it is from the range 64511-65535 64511-65535.