Internet Assigned Numbers Authority Open Shortest Path First v3 (OSPFv3) Parameters Created 2007-04-25 Last Updated 2024-04-17 Note Please also see: [https://www.iana.org/assignments/ospf-dd-packet-flags] [https://www.iana.org/assignments/ospf-lls-tlvs] [https://www.iana.org/assignments/ospf-traffic-eng-tlvs] Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below • OSPFv3 Options (24 bits) • OSPFv3 LSA Function Codes • OSPFv3 Prefix Options (8 bits) • OSPFv3 Router LSA Link Types • OSPFv3 Router Properties Registry • LD Options • OSPFv3 Instance ID Address Family Values • OSPFv3 Autoconfiguration (AC) LSA TLVs • OSPFv3 Extended-LSA TLVs • OSPFv3 Extended-LSA Sub-TLVs • OSPFv3 SRv6 Capabilities TLV Flags • OSPFv3 SRv6 End SID Sub-TLV Flags • OSPFv3 SRv6 Adjacency SID Sub-TLV Flags • OSPFv3 SRv6 Locator LSA TLVs • OSPFv3 SRv6 Locator LSA Sub-TLVs OSPFv3 Options (24 bits) Registration Procedure(s) Standards Action Reference [RFC4940] Available Formats [IMG] CSV Value Description Reference 0x000001 V6-bit [RFC5340] 0x000002 E-bit [RFC2328] 0x000004 Deprecated [RFC5340] 0x000008 N-bit [RFC3101] 0x000010 R-Bit [RFC5340] 0x000020 DC-bit [RFC1793] 0x000040 Reserved for OSPFv2 migrated options [RFC5340] 0x000080 Reserved for OSPFv2 migrated options [RFC5340] 0x000100 AF-bit [RFC5838] 0x000200 L-bit [RFC5613] 0x000400 AT-bit [RFC7166] OSPFv3 LSA Function Codes Reference [RFC7770] Available Formats [IMG] CSV Range Registration Procedures Note 0-255 IETF Review 256-8175 Reserved IANA does not assign 8176-8183 Experimentation IANA does not assign 8184-8190 Vendor Private Use IANA does not assign 8191 Reserved IANA does not assign Value LSA Function Code Name Reference 0 Reserved [RFC7770] 1 Router-LSA [RFC5340] 2 Network-LSA [RFC5340] 3 Inter-Area-Prefix-LSA [RFC5340] 4 Inter-Area-Router-LSA [RFC5340] 5 AS-External-LSA [RFC5340] 6 Deprecated [RFC5340] 7 NSSA-LSA [RFC5340] 8 Link-LSA [RFC5340] 9 Intra-Area-Prefix-LSA [RFC5340] 10 Intra-Area-TE-LSA [RFC5329] 11 GRACE-LSA [RFC5187] 12 OSPFv3 Router Information (RI) LSA [RFC7770] 13 Inter-AS-TE-v3 LSA [RFC5392] 14 OSPFv3 L1VPN LSA [RFC5523] 15 OSPFv3 Autoconfiguration (AC) LSA [RFC7503] 16 OSPFv3 Dynamic Flooding LSA [RFC-ietf-lsr-dynamic-flooding-18] 17-32 Unassigned 33 E-Router-LSA [RFC8362] 34 E-Network-LSA [RFC8362] 35 E-Inter-Area-Prefix-LSA [RFC8362] 36 E-Inter-Area-Router-LSA [RFC8362] 37 E-AS-External-LSA [RFC8362] 38 Unused (Not to be allocated) [RFC8362] 39 E-Type-7-LSA [RFC8362] 40 E-Link-LSA [RFC8362] 41 E-Intra-Area-Prefix-LSA [RFC8362] 42 SRv6 Locator LSA [RFC9513, Section 7] 43-255 Unassigned 256-8175 Reserved [RFC7770] 8176-8183 Experimentation [RFC7770] 8184-8190 Vendor Private Use [RFC7770] 8191 Reserved [RFC7770] OSPFv3 Prefix Options (8 bits) Registration Procedure(s) Standards Action Reference [RFC4940] Available Formats [IMG] CSV Value Description Reference 0x01 NU-bit [RFC5340] 0x02 LA-bit [RFC5340] 0x04 Deprecated [RFC5340] 0x08 P-bit [RFC5340] 0x10 DN-bit [RFC5340] 0x20 N-bit [RFC8362] 0x40 E-Flag (ELC Flag) [RFC9089] 0x80 AC-bit [RFC9513, Section 6] OSPFv3 Router LSA Link Types Reference [RFC4940] Available Formats [IMG] CSV Range Registration Procedures 0-127 Standards Action 128-255 Reserved Value Description Reference 0 Reserved [RFC4940] 1 Point-to-Point connection to another router [RFC5340] 2 Transit Network [RFC5340] 3 Reserved [RFC5340] 4 Virtual Link [RFC5340] 5-127 Unassigned 128-255 Reserved OSPFv3 Router Properties Registry Registration Procedure(s) Standards Action Reference [RFC5340] Available Formats [IMG] CSV Value Description Reference 0x01 B-bit [RFC5340] 0x02 E-bit [RFC5340] 0x04 V-bit [RFC5340] 0x08 Deprecated [RFC5340] 0x10 Nt-bit [RFC5340] LD Options Registration Procedure(s) IETF Review Reference [RFC5820] Available Formats [IMG] CSV Value Description Reference 0x01 U-bit [RFC5820] OSPFv3 Instance ID Address Family Values Registration Procedure(s) Standards Action Reference [RFC5838][RFC6969] Note These values for instance ID are applicable when [RFC5838] is used to support multiple address families. The instance ID field may be used for applications other than the support of multiple address families. Available Formats [IMG] CSV Value Description Reference 0 Base IPv6 Unicast AF [RFC5838] 1-31 Base IPv6 Unicast AF dependent on local policy [RFC5838] 32 Base IPv6 Multicast [RFC5838] 33-63 IPv6 Multicast AFs dependent on local policy [RFC5838] 64 Base IPv4 Unicast AF [RFC5838] 65-95 IPv4 Unicast AFs dependent on local policy [RFC5838] 96 Base IPv4 Multicast [RFC5838] 97-127 IPv4 Multicast AFs dependent on local policy [RFC5838] 128-191 Unassigned 192-255 Reserved for Private Use [RFC6969] OSPFv3 Autoconfiguration (AC) LSA TLVs Registration Procedure(s) IETF Review or IESG Approval Reference [RFC7503] Available Formats [IMG] CSV Value Description Reference 0 Reserved [RFC7503] 1 Router-Hardware-Fingerprint TLV [RFC7503] 2-65534 Unassigned 65535 Autoconfiguration-Experiment-TLV [RFC7503] OSPFv3 Extended-LSA TLVs Reference [RFC8362] Available Formats [IMG] CSV Range Registration Procedures 9-32767 IETF Review or IESG Approval 33024-45055 First Come First Served Value Description Reference 0 Reserved [RFC8362] 1 Router-Link TLV [RFC8362] 2 Attached-Routers TLV [RFC8362] 3 Inter-Area-Prefix TLV [RFC8362] 4 Inter-Area-Router TLV [RFC8362] 5 External-Prefix TLV [RFC8362] 6 Intra-Area-Prefix TLV [RFC8362] 7 IPv6 Link-Local Address TLV [RFC8362] 8 IPv4 Link-Local Address TLV [RFC8362] 9 OSPFv3 Extended Prefix Range TLV [RFC8666] 10-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC8362] 33024-45055 Unassigned 45056-65535 Reserved [RFC8362] OSPFv3 Extended-LSA Sub-TLVs Reference [RFC8362][RFC9356] Note The "L2BM" column indicates applicability to the L2 Bundle Attributes Member sub-TLV. The options for the "L2BM" column are: Y - This sub-TLV MAY appear in the L2 Bundle Member Attributes sub-TLV. N - This sub-TLV MUST NOT appear in the L2 Bundle Member Attributes sub-TLV. X - This is not a sub-TLV of the Router-Link TLV; it MUST NOT appear in the L2 Bundle Member Attributes sub-TLV. Note Allocations made in this registry for sub-TLVs that are associated with OSPFv3 Extended TLVs related to prefix advertisements MUST be evaluated for their applicability as OSPFv3 SRv6 Locator sub-TLVs, which are required to be allocated in the "OSPFv3 SRv6 Locator LSA Sub-TLVs" registry at [IANA registry ospfv3-parameters]. Available Formats [IMG] CSV Range Registration Procedures 4-32767 IETF Review or IESG Approval 33024-45055 First Come First Served Value Description L2BM Reference 0 Reserved [RFC8362] 1 IPv6-Forwarding-Address sub-TLV X [RFC8362] 2 IPv4-Forwarding-Address sub-TLV X [RFC8362] 3 Route-Tag sub-TLV X [RFC8362] 4 Prefix SID sub-TLV X [RFC8666] 5 Adj-SID sub-TLV Y [RFC8666] 6 LAN Adj-SID sub-TLV Y [RFC8666] 7 SID/Label sub-TLV N [RFC8666] 8 Graceful-Link-Shutdown sub-TLV N [RFC8379] 9 OSPFv3 Link MSD N [RFC8476] 10 OSPFv3 Link Attributes Bits Y [RFC-ietf-lsr-dynamic-flooding-18] 11 Application-Specific Link Attributes Y [RFC9492] 12 Shared Risk Link Group Y [RFC9492] 13 Unidirectional Link Delay Y [RFC9492] 14 Min/Max Unidirectional Link Delay Y [RFC9492] 15 Unidirectional Delay Variation Y [RFC9492] 16 Unidirectional Link Loss Y [RFC9492] 17 Unidirectional Residual Bandwidth Y [RFC9492] 18 Unidirectional Available Bandwidth Y [RFC9492] 19 Unidirectional Utilized Bandwidth Y [RFC9492] 20 Administrative Group Y [RFC9492] 21 Extended Administrative Group Y [RFC9492] 22 TE Metric Y [RFC9492] 23 Maximum link bandwidth Y [RFC9492] 24 Local Interface IPv6 Address N [RFC9492] 25 Remote Interface IPv6 Address N [RFC9492] 26 Flexible Algorithm Prefix Metric (FAPM) X [RFC9350, Section 9] 27 Prefix Source OSPF Router-ID X [RFC9084] 28 Prefix Source Router Address X [RFC9084] 29 L2 Bundle Member Attributes N [RFC9356] 30 SRv6 SID Structure Y [RFC9513, Section 10] 31 SRv6 End.X SID Y [RFC9513, Section 9.1] 32 SRv6 LAN End.X SID Y [RFC9513, Section 9.2] 33 OSPF Flexible Algorithm ASBR Metric X [RFC9350, Section 10.2] 34 Generic Metric (TEMPORARY - registered 2023-02-16, extension registered N [draft-ietf-lsr-flex-algo-bw-con-07, Section 2.2] 2023-12-21, expires 2025-02-16) 35 OSPFv3 IP Algorithm Prefix Reachability X [RFC9502, Section 6.4] 36 OSPFv3 IP Flexible Algorithm ASBR Metric X [RFC9502, Section 6.5] 37 OSPFv3 Prefix Attribute Flags (TEMPORARY - registered 2024-04-05, expires X [draft-ietf-lsr-ospf-prefix-extended-flags-02] 2025-04-05) 38-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC8362] 33024-45055 Unassigned 45056-65535 Reserved [RFC8362] OSPFv3 SRv6 Capabilities TLV Flags Registration Procedure(s) Standards Action Reference [RFC9513] Available Formats [IMG] CSV Bit Description Reference 0 Unassigned 1 O-flag [RFC9513, Section 2] 2-15 Unassigned OSPFv3 SRv6 End SID Sub-TLV Flags Registration Procedure(s) Standards Action Reference [RFC9513] Available Formats [IMG] CSV Bit Description Reference 0-7 Unassigned OSPFv3 SRv6 Adjacency SID Sub-TLV Flags Registration Procedure(s) Standards Action Reference [RFC9513] Available Formats [IMG] CSV Bit Description Reference 0 B-flag [RFC9513, Sections 9.1 and 9.2] 1 S-flag [RFC9513, Sections 9.1 and 9.2] 2 P-flag [RFC9513, Sections 9.1 and 9.2] 3-7 Unassigned OSPFv3 SRv6 Locator LSA TLVs Reference [RFC9513] Available Formats [IMG] CSV Range Registration Procedures 0-32767 IETF Review or IESG Approval 33024-45055 First Come First Served Value Description Reference 0 Reserved [RFC9513] 1 SRv6 Locator [RFC9513, Section 7.1] 2-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC9513] 33024-45055 Unassigned 45056-65535 Reserved [RFC9513] OSPFv3 SRv6 Locator LSA Sub-TLVs Reference [RFC9513] Note Allocations made in this registry for sub-TLVs that are associated with OSPFv3 SRv6 Locator TLVs MUST be evaluated for their applicability as OSPFv3 Extended-LSA sub-TLVs, which are required to be allocated in the “OSPFv3 Extended-LSA Sub-TLVs" registry at [IANA registry ospfv3-parameters]. Available Formats [IMG] CSV Range Registration Procedures 0-32767 IETF Review or IESG Approval 33024-45055 First Come First Served Value Description Reference 0 Reserved [RFC9513] 1 SRv6 End SID [RFC9513, Section 8] 2 IPv6-Forwarding-Address [RFC8362][RFC9513, Section 7.2] 3 Route-Tag [RFC8362][RFC9513, Section 7.2] 4 Prefix Source OSPF Router-ID [RFC9084][RFC9513, Section 7.2] 5 Prefix Source Router Address [RFC9084][RFC9513, Section 7.2] 6-9 Unassigned 10 SRv6 SID Structure [RFC9513, Section 10] 11-32767 Unassigned 32768-33023 Reserved for Experimental Use [RFC9513] 33024-45055 Unassigned 45056-65535 Reserved [RFC9513] Licensing Terms