Internet-Draft OHT-MH July 2024
Matsuhira Expires 7 January 2025 [Page]
Workgroup:
Network Working Group
Internet-Draft:
draft-matsuhira-oht-mh-00
Published:
Intended Status:
Informational
Expires:
Author:
N. Matsuhira
Neptela

Outer Header Translator - multihoming

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/.

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This Internet-Draft will expire on 7 January 2025.

Table of Contents

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

                         +--------+
                         | 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
  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 |
                             +------*


  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, , <https://datatracker.ietf.org/doc/html/draft-matsuhira-oht-01>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.

6.2. Informative References

Author's Address

Naoki Matsuhira
Neptela
Japan