Open Shortest Path First (OSPF) Parameters

Created

  • 2015-11-03

Last Updated

  • 2026-09-23

Available Formats

OSPF Router Information (RI) TLVs

Reference

  • RFC 7770: Extensions to OSPF for Advertising Optional Router Capabilities

Available Formats

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 RFC 7770
1 Router Informational Capabilities RFC 7770
2 Router Functional Capabilities RFC 7770
3 TE-MESH-GROUP TLV (IPv4) RFC 4972
4 TE-MESH-GROUP TLV (IPv6) RFC 4972
5 TE Node Capability Descriptor RFC 5073
6 PCED RFC 5088
7 OSPF Dynamic Hostname RFC 5642
8 SR-Algorithm TLV RFC 8665
9 SID/Label Range TLV RFC 8665
10 Node Admin Tag TLV RFC 7777
11 S-BFD Discriminator RFC 7884
12 Node MSD RFC 8476
13 Tunnel Encapsulations RFC 9013
14 SR Local Block TLV RFC 8665
15 SRMS Preference TLV RFC 8665
16 Flexible Algorithm Definition (FAD) TLV RFC 9350, Section 5.2
17 OSPF Area Leader RFC 9667
18 OSPF Dynamic Flooding RFC 9667
19 Unassigned
20 SRv6 Capabilities RFC 9513, Section 2
21 IP Algorithm RFC 9502, Section 5.2
22-32767 Unassigned
32768-32777 Experimentation RFC 7770
32778-65535 Reserved RFC 7770

OSPF Router Informational Capability Bits

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 7770: Extensions to OSPF for Advertising Optional Router Capabilities

Available Formats

Bit Number Capability Name Reference
0 OSPF graceful restart capable RFC 3623
1 OSPF graceful restart helper RFC 3623
2 OSPF Stub Router support RFC 3137
3 OSPF Traffic Engineering support RFC 3630
4 OSPF point-to-point over LAN RFC 5309
5 OSPF Experimental TE RFC 4973
6 Two-Part Metric support RFC 8042
7 OSPF Host Router RFC 8770
8-31 Unassigned

OSPF Router Functional Capability Bits

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 7770: Extensions to OSPF for Advertising Optional Router Capabilities

Note

When this registry is modified, the YANG module iana-ospf-functional-cap-bits must be updated as defined in RFC 10041.

Available Formats

Bit Number Capability Name Reference
0 Unreachable Link RFC 10041
1-31 Unassigned

OSPF Tunnel Parameter Sub-TLVs

Reference

  • RFC 9013: OSPF Advertisement of Tunnel Encapsulations

Available Formats

Range Registration Procedures
1-34999 Standards Action
35000-65499 First Come First Served
Value TLV Name Reference
0 Reserved RFC 9013
1 Encapsulation RFC 9013; RFC 9012
2 Protocol Type RFC 9013; RFC 9012
3 Tunnel Egress Endpoint RFC 9013; RFC Errata 6576
4 Color RFC 9013
5 Load-Balancing Block RFC 9013; RFC 5640
6 DS Field RFC 9013; RFC 9012
7 UDP Destination Port RFC 9013; RFC 9012
8-65499 Unassigned
65500-65534 Experimental RFC 9013
65535 Reserved RFC 9013

OSPF Flex-Algorithm Prefix Metric Bits

Registration Procedure(s)

  • IETF Review

Reference

Available Formats

Bit Number Description Reference
0 E bit - External Type RFC 9350, Section 9
1-7 Unassigned

OSPF Flexible Algorithm Definition TLV Sub-TLVs

Registration Procedure(s)

  • IETF Review or IESG Approval

Reference

Available Formats

Type Description Reference
0 Reserved RFC 9350
1 Flexible Algorithm Exclude Admin Group RFC 9350, Section 7.1
2 Flexible Algorithm Include-Any Admin Group RFC 9350, Section 7.2
3 Flexible Algorithm Include-All Admin Group RFC 9350, Section 7.3
4 Flexible Algorithm Definition Flags RFC 9350, Section 7.4
5 Flexible Algorithm Exclude SRLG RFC 9350, Section 7.5
6 OSPF Exclude Minimum Bandwidth RFC 9843, Section 3.2.1
7 OSPF Exclude Maximum Delay RFC 9843, Section 3.2.2
8 OSPF Reference Bandwidth RFC 9843, Section 4.1.4.1
9 OSPF Bandwidth Threshold RFC 9843, Section 4.1.4.2
10 Flexible Algorithm Exclude Reverse Admin Group RFC 9917, Section 8
11 Flexible Algorithm Include-Any Reverse Admin Group RFC 9917, Section 9
12 Flexible Algorithm Include-All Reverse Admin Group RFC 9917, Section 10
13-32767 Unassigned
32768-33023 Reserved for Experimental Use RFC 9350
33024-65535 Reserved RFC 9350

OSPF Dynamic Flooding LSA TLVs

Registration Procedure(s)

  • IETF Review or IESG Approval

Reference

  • RFC 9667: Dynamic Flooding on Dense Graphs

Available Formats

Type Description Reference
0 Reserved RFC 9667
1 OSPF Area Router IDs RFC 9667
2 OSPF Flooding Path RFC 9667
3-32767 Unassigned
32768-33023 Reserved for Experimental Use RFC 9667
33024-65535 Reserved RFC 9667