Modification to Default Values of SOL_MAX_RT and INF_MAX_RT
RFC 7083
| Document | Type |
RFC - Proposed Standard
(November 2013; No errata)
Obsoleted by RFC 8415
Updates RFC 3315
|
|
|---|---|---|---|
| Author | Ralph Droms | ||
| Last updated | 2015-10-14 | ||
| Replaces | draft-droms-dhc-dhcpv6-solmaxrt-update | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Tomek Mrugalski | ||
| Shepherd write-up | Show (last changed 2013-07-22) | ||
| IESG | IESG state | RFC 7083 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Ted Lemon | ||
| Send notices to | (None) | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) R. Droms
Request for Comments: 7083 Cisco Systems
Updates: 3315 November 2013
Category: Standards Track
ISSN: 2070-1721
Modification to Default Values of SOL_MAX_RT and INF_MAX_RT
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 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 5741.
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/rfc7083.
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
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.
Droms Standards Track [Page 1]
RFC 7083 DHCPv6 SOL_MAX_RT Option November 2013
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 . . 4
7. DHCPv6 Client Behavior . . . . . . . . . . . . . . . . . . . 5
8. DHCPv6 Server Behavior . . . . . . . . . . . . . . . . . . . 6
9. DHCPv6 Relay Agent Behavior . . . . . . . . . . . . . . . . . 6
10. Security Considerations . . . . . . . . . . . . . . . . . . . 6
11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 7
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
13. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
13.1. Normative References . . . . . . . . . . . . . . . . . . 7
13.2. Informative References . . . . . . . . . . . . . . . . . 7
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 on 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 as follows:
OLD:
SOL_MAX_RT 120 secs Max Solicit timeout value
NEW:
SOL_MAX_RT 3600 secs Max Solicit timeout value
Droms Standards Track [Page 2]
RFC 7083 DHCPv6 SOL_MAX_RT Option November 2013
OLD:
INF_MAX_RT 120 secs Max Information-request timeout value
NEW:
INF_MAX_RT 3600 secs Max Information-request timeout value
With this change, a DHCPv6 client that does not receive a
satisfactory response will send Solicit or Information-request
messages with the same initial frequency and exponential backoff as
specified in Sections 17.1.2 and 18.1.5 of RFC 3315. However, the
long-term behavior of these DHCPv6 clients will be to send a Solicit
or Information-request message every 3600 seconds rather than every
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