Modification to Default Values of SOL_MAX_RT and INF_MAX_RT
draft-ietf-dhc-dhcpv6-solmaxrt-update-04

The information below is for an old version of the document
Document Type Active Internet-Draft (dhc WG)
Last updated 2013-09-13
Replaces draft-droms-dhc-dhcpv6-solmaxrt-update
Stream IETF
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Document shepherd Tomek Mrugalski
Shepherd write-up Show (last changed 2013-07-22)
IESG IESG state Waiting for AD Go-Ahead::AD Followup
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Responsible AD Ted Lemon
Send notices to dhc-chairs@tools.ietf.org, draft-ietf-dhc-dhcpv6-solmaxrt-update@tools.ietf.org
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dhc                                                             R. Droms
Internet-Draft                                             Cisco Systems
Updates: 3315 (if approved)                           September 13, 2013
Intended status: Standards Track
Expires: March 17, 2014

      Modification to Default Values of SOL_MAX_RT and INF_MAX_RT
                draft-ietf-dhc-dhcpv6-solmaxrt-update-04

Abstract

   This document updates RFC 3315 by redefining the default values for
   SOL_MAX_RT and INF_MAX_RT, and defining options through which a
   DHCPv6 server can override the client's default value for SOL_MAX_RT
   and INF_MAX_RT with new values.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 17, 2014.

Copyright Notice

   Copyright (c) 2013 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
   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Updates to SOL_MAX_RT and INF_MAX_RT in RFC 3315  . . . . . .   2
   4.  SOL_MAX_RT option . . . . . . . . . . . . . . . . . . . . . .   3
   5.  INF_MAX_RT option . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Updates for SOL_MAX_RT and INF_MAX_RT options to RFC 3315 . .   5
   7.  DHCPv6 Client Behavior  . . . . . . . . . . . . . . . . . . .   6
   8.  DHCPv6 Server Behavior  . . . . . . . . . . . . . . . . . . .   6
   9.  DHCPv6 Relay Agent Behavior Text  . . . . . . . . . . . . . .   7
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   7
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     13.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     13.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Section 5.5 of the DHCPv6 specification [RFC3315] defines the default
   values of SOL_MAX_RT and INF_MAX_RT to be 120 seconds.  In some
   circumstances, these defaults will lead to an unacceptably high
   volume of aggregated traffic at a DHCPv6 server.

   The change to SOL_MAX_RT is in response to DHCPv6 message rates
   observed at a DHCPv6 server in a deployment in which many DHCPv6
   clients are sending Solicit messages but the DHCPv6 server has been
   configured not to respond to those Solicit messages.  While no
   explicit observations of traffic due to INF_MAX_RT have been
   conducted, this document updates INF_MAX_RT for consistency with
   SOL_MAX_RT.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

3.  Updates to SOL_MAX_RT and INF_MAX_RT in RFC 3315

   This document changes section 5.5 of RFC 3315 [RFC3315] as follows:

   OLD:
      SOL_MAX_RT      120 secs  Max Solicit timeout value

   NEW:

Droms                    Expires March 17, 2014                 [Page 2]
Internet-Draft          DHCPv6 SOL_MAX_RT Option          September 2013
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