Internet Assigned Numbers Authority Open Shortest Path First (OSPF) Parameters Created 2015-11-03 Last Updated 2024-04-17 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below • OSPF Router Information (RI) TLVs • OSPF Router Informational Capability Bits • OSPF Router Functional Capability Bits • OSPF Tunnel Parameter Sub-TLVs • OSPF Flex-Algorithm Prefix Metric Bits • OSPF Flexible Algorithm Definition TLV Sub-TLVs • OSPF Dynamic Flooding LSA TLVs • OSPF Link Attributes Sub-TLV Bit Values OSPF Router Information (RI) TLVs Reference [RFC7770] Available Formats [IMG] CSV Range Registration Procedures Note 1-32767 IETF Review 32768-32777 Experimentation IANA does not assign 32778-65535 Reserved IANA does not assign Value TLV Name Reference 0 Reserved [RFC7770] 1 Router Informational Capabilities [RFC7770] 2 Router Functional Capabilities [RFC7770] 3 TE-MESH-GROUP TLV (IPv4) [RFC4972] 4 TE-MESH-GROUP TLV (IPv6) [RFC4972] 5 TE Node Capability Descriptor [RFC5073] 6 PCED [RFC5088] 7 OSPF Dynamic Hostname [RFC5642] 8 SR-Algorithm TLV [RFC8665] 9 SID/Label Range TLV [RFC8665] 10 Node Admin Tag TLV [RFC7777] 11 S-BFD Discriminator [RFC7884] 12 Node MSD [RFC8476] 13 Tunnel Encapsulations [RFC9013] 14 SR Local Block TLV [RFC8665] 15 SRMS Preference TLV [RFC8665] 16 Flexible Algorithm Definition (FAD) TLV [RFC9350, Section 5.2] 17 OSPF Area Leader [RFC-ietf-lsr-dynamic-flooding-18] 18 OSPF Dynamic Flooding [RFC-ietf-lsr-dynamic-flooding-18] 19 Unassigned 20 SRv6 Capabilities [RFC9513, Section 2] 21 IP Algorithm [RFC9502, Section 5.2] 22-32767 Unassigned 32768-32777 Experimentation [RFC7770] 32778-65535 Reserved [RFC7770] OSPF Router Informational Capability Bits Registration Procedure(s) IETF Review Reference [RFC7770] Available Formats [IMG] CSV Bit Number Capability Name Reference 0 OSPF graceful restart capable [RFC3623] 1 OSPF graceful restart helper [RFC3623] 2 OSPF Stub Router support [RFC3137] 3 OSPF Traffic Engineering support [RFC3630] 4 OSPF point-to-point over LAN [RFC5309] 5 OSPF Experimental TE [RFC4973] 6 Two-Part Metric support [RFC8042] 7 OSPF Host Router [RFC8770] 8-31 Unassigned OSPF Router Functional Capability Bits Registration Procedure(s) IETF Review Reference [RFC7770] Available Formats [IMG] CSV Bit Number Capability Name Reference 0-31 Unassigned OSPF Tunnel Parameter Sub-TLVs Reference [RFC9013] Available Formats [IMG] CSV Range Registration Procedures 1-34999 Standards Action 35000-65499 First Come First Served Value TLV Name Reference 0 Reserved [RFC9013] 1 Encapsulation [RFC9013][draft-ietf-idr-tunnel-encaps] 2 Protocol Type [RFC9013][draft-ietf-idr-tunnel-encaps] 3 Tunnel Egress Endpoint [RFC9013][RFC Errata 6576] 4 Color [RFC9013] 5 Load-Balancing Block [RFC9013][RFC5640] 6 DS Field [RFC9013][draft-ietf-idr-tunnel-encaps] 7 UDP Destination Port [RFC9013][draft-ietf-idr-tunnel-encaps] 8-65499 Unassigned 65500-65534 Experimental [RFC9013] 65535 Reserved [RFC9013] OSPF Flex-Algorithm Prefix Metric Bits Registration Procedure(s) IETF Review Reference [RFC9350] Available Formats [IMG] CSV Bit Number Description Reference 0 E bit - External Type [RFC9350, Section 9] 1-7 Unassigned OSPF Flexible Algorithm Definition TLV Sub-TLVs Registration Procedure(s) IETF Review or IESG Approval Reference [RFC9350] Available Formats [IMG] CSV Bit Number Description Reference 0 Reserved [RFC9350] 1 Flexible Algorithm Exclude Admin Group [RFC9350, Section 7.1] 2 Flexible Algorithm Include-Any Admin Group [RFC9350, Section 7.2] 3 Flexible Algorithm Include-All Admin Group [RFC9350, Section 7.3] 4 Flexible Algorithm Definition Flags [RFC9350, Section 7.4] 5 Flexible Algorithm Exclude SRLG [RFC9350, Section 7.5] 6 OSPF Exclude Minimum Bandwidth (TEMPORARY - registered 2023-02-16, [draft-ietf-lsr-flex-algo-bw-con-07, Section 3.2.1] extension registered 2023-12-21, expires 2025-02-16) 7 OSPF Exclude Maximum Delay (TEMPORARY - registered 2023-02-16, [draft-ietf-lsr-flex-algo-bw-con-07, Section 3.2.2] extension registered 2023-12-21, expires 2025-02-16) 8 OSPF Reference Bandwidth (TEMPORARY - registered 2023-02-16, extension [draft-ietf-lsr-flex-algo-bw-con-07, Section 4.1.4.1] registered 2023-12-21, expires 2025-02-16) 9 OSPF Threshold Metric (TEMPORARY - registered 2023-02-16, extension [draft-ietf-lsr-flex-algo-bw-con-07, Section 4.1.4.2] registered 2023-12-21, expires 2025-02-16) 10 Flexible Algorithm Exclude Reverse Admin Group (TEMPORARY - registered [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 7] 2023-12-21, expires 2024-12-21) 11 Flexible Algorithm Include-Any Reverse Admin Group (TEMPORARY - [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 8] registered 2023-12-21, expires 2024-12-21) 12 Flexible Algorithm Include-All Reverse Admin Group (TEMPORARY - [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 9] registered 2023-12-21, expires 2024-12-21) 13-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC9350] 33024-65535 Reserved [RFC9350] OSPF Dynamic Flooding LSA TLVs Registration Procedure(s) IETF Review or IESG Approval Reference [RFC-ietf-lsr-dynamic-flooding-18] Available Formats [IMG] CSV Type Description Reference 0 Reserved [RFC-ietf-lsr-dynamic-flooding-18] 1 OSPF Area Router IDs [RFC-ietf-lsr-dynamic-flooding-18] 2 OSPF Flooding Path [RFC-ietf-lsr-dynamic-flooding-18] 3-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC-ietf-lsr-dynamic-flooding-18] 33024-65535 Reserved [RFC-ietf-lsr-dynamic-flooding-18] OSPF Link Attributes Sub-TLV Bit Values Registration Procedure(s) IETF Review or IESG Approval Reference [RFC-ietf-lsr-dynamic-flooding-18] Note The "L2BM" column indicates applicability to the L2 Bundle Member Attributes sub-TLV. The options for the "L2BM" column are: Y - This bit MAY appear in the L2 Bundle Member Attributes sub-TLV. N - This bit MUST NOT appear in the L2 Bundle Member Attributes sub-TLV. Available Formats [IMG] CSV Bit Number Description L2 Bundle Member Attributes (L2BM) Reference 0 Local Edge Enabled for Flooding(LEEF) N [RFC-ietf-lsr-dynamic-flooding-18] Licensing Terms