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First-Hop Router Selection by Hosts in a Multi-Prefix Network (RFC8028) Disclosure Number: IPCOM000248433D
Original Publication Date: 2016-Nov-01
Included in the Prior Art Database: 2016-Nov-29
Document File: 26 page(s) / 31K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

F. Baker: AUTHOR [+1]


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Internet Engineering Task Force (IETF)                          F. Baker Request for Comments: 8028 Updates: 4861                                               B. Carpenter Category: Standards Track                              Univ. of Auckland ISSN: 2070-1721                                            November 2016

      First-Hop Router Selection by Hosts in a Multi-Prefix Network


   This document describes expected IPv6 host behavior in a scenario

   that has more than one prefix, each allocated by an upstream network

   that is assumed to implement BCP 38 ingress filtering, when the host

   has multiple routers to choose from.  It also applies to other

   scenarios such as the usage of stateful firewalls that effectively

   act as address-based filters.  Host behavior in choosing a first-hop

   router may interact with source address selection in a given

   implementation.  However, the selection of the source address for a

   packet is done before the first-hop router for that packet is chosen.

   Given that the network or host is, or appears to be, multihomed with

   multiple provider-allocated addresses, that the host has elected to

   use a source address in a given prefix, and that some but not all

   neighboring routers are advertising that prefix in their Router

   Advertisement Prefix Information Options, this document specifies to

   which router a host should present its transmission.  It updates RFC


Status of This Memo

   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

 Baker & Carpenter            Standards Track                    [Page 1]
 RFC 8028       Router Selection in a Multi-Prefix Network  November 2016

 Copyright Notice

   Copyright (c) 2016 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    ( 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 Simplified...