Internet Assigned Numbers Authority

Open Shortest Path First (OSPF) Parameters

Created
2015-11-03
Last Updated
2025-03-03
Available Formats

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Registries Included Below

OSPF Router Information (RI) TLVs

Reference
[RFC7770]
Available Formats

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

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

CSV
Bit Number Capability Name Reference
0-31 Unassigned

OSPF Tunnel Parameter Sub-TLVs

Reference
[RFC9013]
Available Formats

CSV
Range Registration Procedures
1-34999 Standards Action
35000-65499 First Come First Served
Value TLV Name Reference
0 Reserved [RFC9013]
1 Encapsulation [RFC9013][RFC9012]
2 Protocol Type [RFC9013][RFC9012]
3 Tunnel Egress Endpoint [RFC9013][RFC Errata 6576]
4 Color [RFC9013]
5 Load-Balancing Block [RFC9013][RFC5640]
6 DS Field [RFC9013][RFC9012]
7 UDP Destination Port [RFC9013][RFC9012]
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

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

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 [RFC-ietf-lsr-flex-algo-bw-con-22, Section 3.2.1]
7 OSPF Exclude Maximum Delay [RFC-ietf-lsr-flex-algo-bw-con-22, Section 3.2.2]
8 OSPF Reference Bandwidth [RFC-ietf-lsr-flex-algo-bw-con-22, Section 4.1.4.1]
9 OSPF Bandwidth Threshold [RFC-ietf-lsr-flex-algo-bw-con-22, Section 4.1.4.2]
10 Flexible Algorithm Exclude Reverse Admin Group (TEMPORARY - registered 2023-12-21, extension registered 2024-12-02, expires 2025-12-21) [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 7]
11 Flexible Algorithm Include-Any Reverse Admin Group (TEMPORARY - registered 2023-12-21, extension registered 2024-12-02, expires 2025-12-21) [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 8]
12 Flexible Algorithm Include-All Reverse Admin Group (TEMPORARY - registered 2023-12-21, extension registered 2024-12-02, expires 2025-12-21) [draft-ietf-lsr-igp-flex-algo-reverse-affinity-01, Section 9]
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

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

CSV