NFS Version 4.0 Trunking Update
RFC 8587

Document Type RFC - Proposed Standard (May 2019; No errata)
Updates RFC 7530
Last updated 2019-05-07
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Spencer Shepler
Shepherd write-up Show (last changed 2018-10-21)
IESG IESG state RFC 8587 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Spencer Dawkins
Send notices to Spencer Shepler <spencer.shepler@gmail.com>
IANA IANA review state Version Changed - Review Needed
IANA action state No IANA Actions
Internet Engineering Task Force (IETF)                     C. Lever, Ed.
Request for Comments: 8587                                        Oracle
Updates: 7530                                                  D. Noveck
Category: Standards Track                                         NetApp
ISSN: 2070-1721                                                 May 2019

                    NFS Version 4.0 Trunking Update

Abstract

   In NFS version 4.0, the fs_locations attribute informs clients about
   alternate locations of file systems.  An NFS version 4.0 client can
   use this information to handle migration and replication of server
   file systems.  This document describes how an NFS version 4.0 client
   can also use this information to discover an NFS version 4.0 server's
   trunking capabilities.  This document updates RFC 7530.

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
   https://www.rfc-editor.org/info/rfc8587.

Copyright Notice

   Copyright (c) 2019 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
   (https://trustee.ietf.org/license-info) 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 BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Lever & Noveck               Standards Track                    [Page 1]
RFC 8587                 NFSv4.0 Trunking Update                May 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Document Organization . . . . . . . . . . . . . . . . . . . .   6
   5.  Changes within Section 8 of RFC 7530  . . . . . . . . . . . .   7
     5.1.  Updated Section "Location Attributes"
           (Currently Section 8.1) . . . . . . . . . . . . . . . . .   8
     5.2.  Updates to "Uses of Location Information"
           (Currently Section 8.4) . . . . . . . . . . . . . . . . .   9
       5.2.1.  Updates to the Introductory Text of the Current
               Section 8.4 . . . . . . . . . . . . . . . . . . . . .   9
       5.2.2.  New Subsection Titled "Trunking Discovery and
               Detection" (Becomes Section 8.4.1)  . . . . . . . . .  11
       5.2.3.  New Subsection Titled "Location Attributes and
               Selection of Connection Type" (Becomes Section 8.4.2)  12
       5.2.4.  Updated Section "File System Replication" (Becomes
               Section 8.4.3 Retitled "File System Replication and
               Trunking" . . . . . . . . . . . . . . . . . . . . . .  12
       5.2.5.  Updated Section "File System Migration" (Becomes
               Section 8.4.4)  . . . . . . . . . . . . . . . . . . .  13
       5.2.6.  New Subsection Titled "Interaction of Trunking,
               Migration, and Replication" (Becomes Section 8.4.5) .  14
     5.3.  Updated Section "Location Entries and Server Identity"
           (Section 8.5) . . . . . . . . . . . . . . . . . . . . . .  16
   6.  Updates to RFC 7530 outside Section 8 . . . . . . . . . . . .  16
   7.  Updates to the Security Considerations Section of RFC 7530  .  16
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
   9.  Updates to the References Section in RFC 7530 . . . . . . . .  19
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  20
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  20
     10.2.  Informative References . . . . . . . . . . . . . . . . .  21
   Appendix A.  Section Classification . . . . . . . . . . . . . . .  22
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

Lever & Noveck               Standards Track                    [Page 2]
RFC 8587                 NFSv4.0 Trunking Update                May 2019

1.  Introduction

   The NFS version 4.0 specification [RFC7530] defines a migration
   feature that enables the transfer of a file system from one server to
   another without disruption of client activity.  There were a number
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