Network Working Group N. Matsuhira Internet-Draft Neptela Intended status: Informational 6 July 2024 Expires: 7 January 2025 Outer Header Translator - multihoming draft-matsuhira-oht-mh-00 Abstract This document describes how to achieve multihoming using OHT. This document describes both the use of provider addresses and provider independent addresses. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 7 January 2025. Copyright Notice Copyright (c) 2024 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 Matsuhira Expires 7 January 2025 [Page 1] Internet-Draft OHT-MH July 2024 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Network Configuration . . . . . . . . . . . . . . . . . . . . 2 2.1. Multihoming with Provider Based Address . . . . . . . . . 2 2.2. Multihoming with Provider Independent Address . . . . . . 4 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 4. Security Considerations . . . . . . . . . . . . . . . . . . . 5 5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.1. Normative References . . . . . . . . . . . . . . . . . . 5 6.2. Informative References . . . . . . . . . . . . . . . . . 5 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction This document describes how to achieve multihoming using OHT [I-D.matsuhira-oht]. This document describes both the use of provider addresses and provider independent addresses. 2. Network Configuration This section describes multihoming configuration with OHT. 2.1. Multihoming with Provider Based Address Matsuhira Expires 7 January 2025 [Page 2] Internet-Draft OHT-MH July 2024 +--------+ | Server | +--------+ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ / The Internet / ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | +---* +---+ ~~|OHT|~~~ ~~|OHT|~~~ / |P1 | / / |P2 | / / +---+ / / +---+ / / ISP / / ISP / / #1 / / #2 / ~~~~~~~~~~~ ~~~~~~~~~~ | | +-----+ +-----+ | OHT | | OHT | | C1 | | C2 | +--+--+ +--+--+ | | -----+----------------------------------- | PA(#1) +---+--* | HOST | +------* Figure 1 HOST ------------> OHT C1 ------------> OHT P1 -----------> Server +-----------+ +-----------+ +-----------+ | IP | data | | IP | data | | IP | data | +-----------+ +-----------+ +-----------+ src: PA(#1) src: PA(#1) src: PA(#1) dst: Server dst: Server dst: Server Figure 2 Matsuhira Expires 7 January 2025 [Page 3] Internet-Draft OHT-MH July 2024 HOST ------------> OHT C1 -----------> OHT C2 -----------> OHT P2 +-----------+ +----------------+ +----------------+ | IP | data | | IP | IP | data | | IP | IP | data | +-----------+ +----------------+ +----------------+ src: PA(#1) src: C1 src: C2 dst: Server dst: C2 dst: P2 OHT P2 ------------> OHT P1 -------------> Server +---------------+ +-----------+ | IP | IP |data | | IP | data | +---------------+ +-----------+ src: P2 src: PA(#1) dst: P1 dst: Server Figure 3 2.2. Multihoming with Provider Independent Address +--------+ | Server | +--------+ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ / The Internet / ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | +---* +---+ ~~|OHT|~~~ ~~|OHT|~~~ / |P1 | / / |P2 | / / +---+ / / +---+ / / ISP / / ISP / / #1 / / #2 / ~~~~~~~~~~~ ~~~~~~~~~~ | | +-----+ +-----+ | OHT | | OHT | | C1 | | C2 | +--+--+ +--+--+ | | -----+----------------------------------- | PI +---+--* | HOST | +------* Matsuhira Expires 7 January 2025 [Page 4] Internet-Draft OHT-MH July 2024 HOST ------------> OHT C1 ------------> OHT P1 ---------> Server +-----------+ +----------------+ +-----------+ | IP | data | | IP | IP | data | | IP | data | +-----------+ +----------------+ +-----------+ src: PI src: C1 src: PI dst: Server dst: P1 dst: Server Figure 4 3. IANA Considerations This document makes no request of IANA. Note to RFC Editor: this section may be removed on publication as an RFC. 4. Security Considerations IPsec for internal packets works because internal packets are forwarded unchanged. 5. Acknowledgements It may be listed in the future. 6. References 6.1. Normative References [I-D.matsuhira-oht] Matsuhira, N., "Outer Header Translator", Work in Progress, Internet-Draft, draft-matsuhira-oht-01, 25 February 2024, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . 6.2. Informative References Author's Address Naoki Matsuhira Neptela Japan Matsuhira Expires 7 January 2025 [Page 5] Internet-Draft OHT-MH July 2024 Email: matsuhira.ietf@gmail.com Matsuhira Expires 7 January 2025 [Page 6]