Host Multihoming with the Host Identity Protocol (RFC8047)
Original Publication Date: 2017-Feb-01
Included in the Prior Art Database: 2017-Feb-15
Internet Society Requests For Comment (RFCs)
T. Henderson: AUTHOR [+3]
The multihoming scenarios can be explained in contrast to the non-multihoming case described in the base protocol specification [RFC7401]. We review the pertinent details here. In the base specification, when used with the ESP transport format, the HIP base exchange will set up a single SA in each direction. The IP addresses associated with the SAs are the same as those used to convey the HIP packets. For data traffic, a security policy database (SPD) and security association database (SAD) will likely exist, following the IPsec architecture. One distinction between HIP and IPsec, however, is that the host IDs, and not the IP addresses, are conceptually used as selectors in the SPD. In the outbound direction, as a result of SPD processing, when an outbound SA is selected, the correct IP destination address for the peer must also be assigned. Therefore, outbound SAs are conceptually associated with the peer IP address that must be used as the destination IP address below the HIP layer. In the inbound direction, the IP addresses may be used as selectors in the SAD to look up the SA, but they are not strictly required; the ESP SPI may be used alone. To summarize, in the non-multihoming case, there is only one source IP address, one destination IP address, one inbound SA, and one outbound SA.
Internet Engineering Task Force (IETF) T. Henderson, Ed. Request for Comments: 8047 University of Washington Category: Standards Track C. Vogt ISSN: 2070-1721 Independent J. Arkko Ericsson February 2017
Host Multihoming with the Host Identity Protocol
This document defines host multihoming extensions to the Host Identity Protocol (HIP), by leveraging protocol components defined for host mobility.
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 http://www.rfc-editor.org/info/rfc8047.
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Henderson, et al. Standards Track [Page 1]
RFC 8047 HIP Multihoming February 2017
Table of Contents
1. Introduction and Scope . . . . . . . . . . . . . . . . . . . 3
2. Terminology and Conventions . . . . . . . . . . . . . . . . . 4
3. Protocol Model . . . . . . . . . . . . . . . . . . . . . . . 4
4. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 4
4.1. Background . . . . . . . . . ....