4. IANA 考虑

IANA 在 "Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs) Ping Parameters" 注册表组下的 "Sub-TLVs for TLV Types 1, 16, and 21" 注册表中, 为 SR MPLS P2MP Policy Tree Instance sub-TLV 分配 sub-type 41. 该值来自 Standards Action 范围 0-16383, 并从 "TLVs" 注册表的 Type 1 (Target FEC Stack) 分配.

Sub-Type	Sub-TLV Name
41	SR MPLS P2MP Policy Tree Instance