2015-11-03 2026-03-25 1-32767 IETF Review 32768-32777 Experimentation IANA does not assign 32778-65535 Reserved IANA does not assign 0 Reserved 1 Router Informational Capabilities 2 Router Functional Capabilities 3 TE-MESH-GROUP TLV (IPv4) 4 TE-MESH-GROUP TLV (IPv6) 5 TE Node Capability Descriptor 6 PCED 7 OSPF Dynamic Hostname 8 SR-Algorithm TLV 9 SID/Label Range TLV 10 Node Admin Tag TLV 11 S-BFD Discriminator 12 Node MSD 13 Tunnel Encapsulations 14 SR Local Block TLV 15 SRMS Preference TLV 16 Flexible Algorithm Definition (FAD) TLV RFC9350, Section 5.2 17 OSPF Area Leader 18 OSPF Dynamic Flooding 19 Unassigned 20 SRv6 Capabilities RFC9513, Section 2 21 IP Algorithm RFC9502, Section 5.2 22-32767 Unassigned 32768-32777 Experimentation 32778-65535 Reserved IETF Review 0 OSPF graceful restart capable 1 OSPF graceful restart helper 2 OSPF Stub Router support 3 OSPF Traffic Engineering support 4 OSPF point-to-point over LAN 5 OSPF Experimental TE 6 Two-Part Metric support 7 OSPF Host Router 8-31 Unassigned IETF Review When this registry is modified, the YANG module iana-ospf-functional-cap-bits must be updated as defined in . 0 Unreachable Link 1-31 Unassigned 1-34999 Standards Action 35000-65499 First Come First Served 0 Reserved 1 Encapsulation 2 Protocol Type 3 Tunnel Egress Endpoint 4 Color 5 Load-Balancing Block 6 DS Field 7 UDP Destination Port 8-65499 Unassigned 65500-65534 Experimental 65535 Reserved IETF Review 0 E bit - External Type RFC9350, Section 9 1-7 Unassigned IETF Review or IESG Approval 0 Reserved 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 RFC9843, Section 3.2.1 7 OSPF Exclude Maximum Delay RFC9843, Section 3.2.2 8 OSPF Reference Bandwidth RFC9843, Section 4.1.4.1 9 OSPF Bandwidth Threshold RFC9843, Section 4.1.4.2 10 Flexible Algorithm Exclude Reverse Admin Group RFC9917, Section 8 11 Flexible Algorithm Include-Any Reverse Admin Group RFC9917, Section 9 12 Flexible Algorithm Include-All Reverse Admin Group RFC9917, Section 10 13-32767 Unassigned 32768-33023 Reserved for Experimental Use 33024-65535 Reserved IETF Review or IESG Approval 0 Reserved 1 OSPF Area Router IDs 2 OSPF Flooding Path 3-32767 Unassigned 32768-33023 Reserved for Experimental Use 33024-65535 Reserved IETF Review or IESG Approval 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. 0 Local Edge Enabled for Flooding (LEEF) N