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RFC 8028
Title: First-Hop Router Selection by Hosts
in a Multi-Prefix Network
Author: F. Baker, B. Carpenter
Status: Standards Track
Stream: IETF
Date: November 2016
Mailbox: fredbaker.ietf@gmail.com,
brian.e.carpenter@gmail.com
Pages: 13
Characters: 30987
Updates: RFC 4861
I-D Tag: draft-ietf-6man-multi-homed-host-10.txt
URL: https://www.rfc-editor.org/info/rfc8028
DOI: 10.17487/RFC8028
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
4861.
This document is a product of the IPv6 Maintenance Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
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