Using Conditional Router Advertisements for Enterprise Multihoming
draft-linkova-v6ops-conditional-ras-00

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IPv6 Operations                                               J. Linkova
Internet-Draft                                                    Google
Intended status: Informational                             June 14, 2017
Expires: December 16, 2017

   Using Conditional Router Advertisements for Enterprise Multihoming
                 draft-linkova-v6ops-conditional-ras-00

Abstract

   This document discusses most common scenarios of connecting an
   enterprise network to multiple ISPs using provider aggregatable
   address space (PA).  The problem of enterprise multihoming without
   address translation of any form has not been solved yet as it
   requires both the network to select the correct egress ISP based on
   the packet source address and hosts to select the correct source
   address based on the desired egress ISP for that traffic.
   [I-D.ietf-rtgwg-enterprise-pa-multihoming] proposes a solution to
   this problem by introducing a new routing functionality (Source
   Address Dependent Routing) to solve the uplink selection issue and
   using Router Advertisements to influence the host source address
   selection.  While the above-mentioned document focus is on solving
   the general problem and to cover various complex use cases, this
   document describes how the solution proposed in
   [I-D.ietf-rtgwg-enterprise-pa-multihoming] can be adopted for limited
   number of common use cases.  In particular the focus is on scenarios
   when a enterprise network has two Internet uplinks used either in
   primary/backup mode or simultaniously and hosts in that network might
   not yet properly support multihoming as described in [RFC8028].

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
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   This Internet-Draft will expire on December 16, 2017.

Linkova                 Expires December 16, 2017               [Page 1]
Internet-Draft               Conditional RAs                   June 2017

Copyright Notice

   Copyright (c) 2017 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Common Enterprise Multihoming Scenarios . . . . . . . . . . .   3
     2.1.  Two ISP Uplinks, Primary and Backup . . . . . . . . . . .   3
     2.2.  Two ISP Uplinks, Used for Load Balancing  . . . . . . . .   4
   3.  Conditional Router Advertisements . . . . . . . . . . . . . .   4
     3.1.  Solution Overview . . . . . . . . . . . . . . . . . . . .   4
       3.1.1.  Uplink Selection  . . . . . . . . . . . . . . . . . .   4
       3.1.2.  Source Address Selection and Conditional RAs  . . . .   4
     3.2.  Example Scenarios . . . . . . . . . . . . . . . . . . . .   6
       3.2.1.  Single Router, Primary/Backup Uplinks . . . . . . . .   6
       3.2.2.  Two Routers, Primary/Backup Uplinks . . . . . . . . .   7
       3.2.3.  Single Router, Load Balancing Between Uplinks . . . .   9
       3.2.4.  Two Router, Load Balancing Between Uplinks  . . . . .  10
       3.2.5.  Topologies with Dedicated Border Routers  . . . . . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
     5.1.  Privacy Considerations  . . . . . . . . . . . . . . . . .  11
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  13
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