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Status:

PROPOSED STANDARD

Updates:

RFC 4861

Authors:

F. Baker
B. Carpenter

Stream:

IETF

Source:

6man (int)

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DOI:  https://doi.org/10.17487/RFC8028

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Abstract

This document describes expected IPv6 host behavior in a scenariothat has more than one prefix, each allocated by an upstream networkthat is assumed to implement BCP 38 ingress filtering, when the hosthas multiple routers to choose from. It also applies to otherscenarios such as the usage of stateful firewalls that effectivelyact as address-based filters. Host behavior in choosing a first-hoprouter may interact with source address selection in a givenimplementation. However, the selection of the source address for apacket is done before the first-hop router for that packet is chosen.Given that the network or host is, or appears to be, multihomed withmultiple provider-allocated addresses, that the host has elected touse a source address in a given prefix, and that some but not allneighboring routers are advertising that prefix in their RouterAdvertisement Prefix Information Options, this document specifies towhich router a host should present its transmission. It updates RFC4861.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.