A Lower Effort Per-Hop Behavior (LE PHB)
draft-ietf-tsvwg-le-phb-06
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2018-12-21
(latest revision 2018-10-11)
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draft-bless-tsvwg-le-phb
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Proposed Standard
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David Black
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AD Evaluation::Revised I-D Needed
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Spencer Dawkins
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Internet Engineering Task Force R. Bless
Internet-Draft Karlsruhe Institute of Technology (KIT)
Obsoletes: 3662 (if approved) October 11, 2018
Updates: 4594,8325 (if approved)
Intended status: Standards Track
Expires: April 14, 2019
A Lower Effort Per-Hop Behavior (LE PHB)
draft-ietf-tsvwg-le-phb-06
Abstract
This document specifies properties and characteristics of a Lower
Effort (LE) per-hop behavior (PHB). The primary objective of this LE
PHB is to protect best-effort (BE) traffic (packets forwarded with
the default PHB) from LE traffic in congestion situations, i.e., when
resources become scarce, best-effort traffic has precedence over LE
traffic and may preempt it. Alternatively, packets forwarded by the
LE PHB can be associated with a scavenger service class, i.e., they
scavenge otherwise unused resources only. There are numerous uses
for this PHB, e.g., for background traffic of low precedence, such as
bulk data transfers with low priority in time, non time-critical
backups, larger software updates, web search engines while gathering
information from web servers and so on. This document recommends a
standard DSCP value for the LE PHB. This specification obsoletes RFC
3662 and updates the DSCP recommended in RFC 4594 and RFC 8325 to use
the DSCP assigned in this specification.
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
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 April 14, 2019.
Bless Expires April 14, 2019 [Page 1]
Internet-Draft Lower Effort PHB October 2018
Copyright Notice
Copyright (c) 2018 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
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This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
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Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Applicability . . . . . . . . . . . . . . . . . . . . . . . . 3
4. PHB Description . . . . . . . . . . . . . . . . . . . . . . . 5
5. Traffic Conditioning Actions . . . . . . . . . . . . . . . . 6
6. Recommended DS Codepoint . . . . . . . . . . . . . . . . . . 6
7. Deployment Considerations . . . . . . . . . . . . . . . . . . 7
8. Remarking to other DSCPs/PHBs . . . . . . . . . . . . . . . . 8
9. Multicast Considerations . . . . . . . . . . . . . . . . . . 9
10. The Update to RFC 4594 . . . . . . . . . . . . . . . . . . . 10
11. The Update to RFC 8325 . . . . . . . . . . . . . . . . . . . 11
12. The Update to draft-ietf-tsvwg-rtcweb-qos . . . . . . . . . . 12
13. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
14. Security Considerations . . . . . . . . . . . . . . . . . . . 14
15. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
15.1. Normative References . . . . . . . . . . . . . . . . . . 14
15.2. Informative References . . . . . . . . . . . . . . . . . 14
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