This document updates some OSPF terminology to be in line with inclusive language used in the industry. The IETF has designated "Guidance for NIST Staff on Using Inclusive Language in Documentary Standards" by the US National Institute of Standards and Technology (NIST) for its inclusive language guidelines. It is intended that all future OSPF documents use this revised terminology even when they reference the RFCs updated by this document. This document updates RFCs 2328, 4222, 4811, 5243, 5340, 5614, and 5838.

This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc9454.

Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.

This document updates some OSPF terminology to be in line with inclusive language used in the industry. The IETF has designated "Guidance for NIST Staff on Using Inclusive Language in Documentary Standards" by the US National Institute of Standards and Technology (NIST) [NISTIR8366] for its inclusive language guidelines. It is intended that all future OSPF documents use this revised terminology even when they reference the RFCs updated by this document. This document updates [RFC 2328], [RFC 4222], [RFC 4811], [RFC 5243], [RFC 5340], [RFC 5614], and [RFC 5838].

The base OSPFv2 specification "OSPF Version 2" [RFC 2328] defines the synchronization of databases as two routers forming a "master/slave" relationship. All instances of these terms are replaced by "Leader/Follower", respectively. In the Database Description packet, the "master (MS) bit" is renamed the "Leader (L) bit". The operation of OSPFv2 is not modified. The Leader/Follower terminology and Leader (L) bit definition changes impact the following sections: "The Synchronization of Databases" (Section 7.2), "The Neighbor Data Structure" (Section 10), "Neighbor states" (Section 10.1), "Events causing neighbor state changes" (Section 10.2), "The Neighbor state machine" (Section 10.3), "Receiving Database Description Packets" (Section 10.6), "Sending Database Description Packets" (Section 10.8), "An Example" (Section 10.10), and "The Database Description packet" (Appendix A.3.3).

"Prioritized Treatment of Specific OSPF Version 2 Packets and Congestion Avoidance" [RFC 4222] is a Best Current Practice (BCP) document. In Appendix C, Item (2), there is an example OSFPv2 packet sequence that refers to the "slave" in a database exchange; this reference is renamed to "Follower".

"OSPF Out-of-Band Link State Database (LSDB) Resynchronization" [RFC 4811] is an Informational document. Section 2.4 includes a Database Description packet (Figure 2) and a description of the attendant encoding changes for Out-of-Band Resynchronization. In the figure and the description, all instances of "MS" (when referring to the Database Description packet bit) are renamed to "L". There is also a reference to "Master" in this section that is renamed to "Leader".

"OSPF Database Exchange Summary List Optimization" [RFC 5243] is an Informational document. The Introduction (Section 1) references "Master or Slave"; this is replaced by "Leader or Follower". Section 3 includes an example of the optimized database exchange. In this example, all instances of "Master" and "Slave" are renamed to "Leader" and "Follower", respectively.

The base OSPFv3 specification "OSPF for IPv6" [RFC 5340] defines the Database Description process between two routers as one being "designated to be the master and the other is the slave". All instances of these terms are replaced by "Leader/Follower", respectively. In the Database Description packet, the "Master/Slave (MS) bit" is renamed the "Leader (L) bit". The operation of OSPFv3 is not modified. The Leader/Follower terminology and Leader (L) bit definition changes impact "The Database Description Packet" (Appendix A.3.3).

"Mobile Ad Hoc Network (MANET) Extension of OSPF Using Connected Dominating Set (CDS) Flooding" [RFC 5614] is an Experimental document. "Changes to the Neighbor State Machine" (Section 7.1) contains modifications to the neighbor state machine that were updated from [RFC 2328]. In the neighbor state machine modifications, all instances of "Master" and "Slave" are renamed to "Leader" and "Follower", respectively. Additionally, all instances of "MS" (when referring to the Database Description packet bit) are renamed to "L". And in "Receiving Database Description Packets" (Section 7.5), "master or slave" is replaced by "Leader or Follower" in the parenthetical.

"Support of Address Families in OSPFv3" [RFC 5838] is a Standards Track document. "Database Description Maximum Transmission Unit (MTU) Specification for Non-IPv6 AFs" (Section 2.7) contains a Database Description packet change figure that includes the MS bit. In this figure, the "MS" field is renamed the "L" field. Additionally, in the first paragraph of "Changes to the Hello Packet Processing" (Section 2.4), the text is updated to remove the non-inclusive terms pertaining to unreachability handling as follows:

---

---

In the "Database Description (DD) Packet Flags" registry, IANA has updated the description for value 0x01 to "Leader (L-bit)" and has added this document as a reference, as shown below.

Value:

0x01

Description:

Leader (L-bit)

Reference:

[RFC 2328] [RFC9454]

This document updates the terminology used in OSPF RFCs without any modification to the specifications of the protocol. As such, the security characteristics of OSPF do not change.

[RFC2328]

J. Moy, "OSPF Version 2", STD 54, RFC 2328, DOI 10.17487/RFC2328, April 1998,
<https://www.rfc-editor.org/info/rfc2328>.

[RFC4222]

G. Choudhury, "Prioritized Treatment of Specific OSPF Version 2 Packets and Congestion Avoidance", BCP 112, RFC 4222, DOI 10.17487/RFC4222, October 2005,
<https://www.rfc-editor.org/info/rfc4222>.

[RFC4811]

L. Nguyen, A. Roy, and A. Zinin, "OSPF Out-of-Band Link State Database (LSDB) Resynchronization", RFC 4811, DOI 10.17487/RFC4811, March 2007,
<https://www.rfc-editor.org/info/rfc4811>.

[RFC5243]

R. Ogier, "OSPF Database Exchange Summary List Optimization", RFC 5243, DOI 10.17487/RFC5243, May 2008,
<https://www.rfc-editor.org/info/rfc5243>.

[RFC5340]

R. Coltun, D. Ferguson, J. Moy, and A. Lindem, "OSPF for IPv6", RFC 5340, DOI 10.17487/RFC5340, July 2008,
<https://www.rfc-editor.org/info/rfc5340>.

[RFC5614]

R. Ogier, and P. Spagnolo, "Mobile Ad Hoc Network (MANET) Extension of OSPF Using Connected Dominating Set (CDS) Flooding", RFC 5614, DOI 10.17487/RFC5614, August 2009,
<https://www.rfc-editor.org/info/rfc5614>.

[RFC5838]

A. Lindem, S. Mirtorabi, A. Roy, M. Barnes, and R. Aggarwal, "Support of Address Families in OSPFv3", RFC 5838, DOI 10.17487/RFC5838, April 2010,
<https://www.rfc-editor.org/info/rfc5838>.

[NISTIR8366]

National Institute of Standards and Technology (NIST), "Guidance for NIST Staff on Using Inclusive Language in Documentary Standards", NIST Interagency/Internal Report (NISTIR) 8366, April 2021,
<https://doi.org/10.6028/NIST.IR.8366>.

Thanks to Dhruv Dhody, Adrian Farrel, Erik Kline, and Barry Leiba for their reviews and comments.

Mike Fox

Acee Lindem

Alvaro Retana