Russian Dolls Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering
RFC 4127
| Document | Type | RFC - Experimental (June 2005; No errata) | |
|---|---|---|---|
| Author | François Le Faucheur | ||
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4127 (Experimental) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Bert Wijnen | ||
| Send notices to | (None) | ||
Network Working Group F. Le Faucheur, Ed.
Request for Comments: 4127 Cisco Systems, Inc.
Category: Experimental June 2005
Russian Dolls Bandwidth Constraints Model for
Diffserv-aware MPLS Traffic Engineering
Status of This Memo
This memo defines an Experimental Protocol for the Internet
community. It does not specify an Internet standard of any kind.
Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2005).
Abstract
This document provides specifications for one Bandwidth Constraints
Model for Diffserv-aware MPLS Traffic Engineering, which is referred
to as the Russian Dolls Model.
Table of Contents
1. Introduction ....................................................2
1.1. Specification of Requirements ..............................2
2. Contributing Authors ............................................3
3. Definitions .....................................................4
4. Russian Dolls Model Definition ..................................5
5. Example Formulas for Computing "Unreserved TE-Class [i]" with
Russian Dolls Model .............................................7
6. Receiving Both Maximum Reservable Bandwidth and Bandwidth
Constraints sub-TLVs ............................................8
7. Security Considerations .........................................8
8. IANA Considerations .............................................8
9. Acknowledgements ................................................9
Appendix A: Addressing [DSTE-REQ] Scenarios .......................10
Normative References ..............................................11
Informative References ............................................12
Le Faucheur Experimental [Page 1]
RFC 4127 Russian Dolls Model for DS-TE June 2005
1. Introduction
[DSTE-REQ] presents the Service Providers requirements for support of
Diffserv-aware MPLS Traffic Engineering (DS-TE). This includes the
fundamental requirement to be able to enforce different Bandwidth
Constraints for different classes of traffic.
[DSTE-REQ] also defines the concept of Bandwidth Constraints Model
for DS-TE and states that "The DS-TE technical solution MUST specify
at least one Bandwidth Constraints Model and MAY specify multiple
Bandwidth Constraints Models".
This document provides a detailed description of one particular
Bandwidth Constraints Model for DS-TE which is introduced in
[DSTE-REQ] and called the Russian Dolls Model (RDM).
[DSTE-PROTO] specifies the Interior Gateway Protocol (IGP) and RSVP-
TE signaling extensions for support of DS-TE. These extensions
support RDM.
1.1. Specification of Requirements
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 [RFC2119].
Le Faucheur Experimental [Page 2]
RFC 4127 Russian Dolls Model for DS-TE June 2005
2. Contributing Authors
This document was the collective work of several authors. The text
and content were contributed by the editor and the co-authors listed
below. (The contact information for the editor appears in the
Editor's Address section.)
Jim Boyle Kireeti Kompella
Protocol Driven Networks, Inc. Juniper Networks, Inc.
1381 Kildaire Farm Road #288 1194 N. Mathilda Ave.
Cary, NC 27511, USA Sunnyvale, CA 94099
Phone: (919) 852-5160 EMail: kireeti@juniper.net
EMail: jboyle@pdnets.com
William Townsend Thomas D. Nadeau
Tenor Networks Cisco Systems, Inc.
100 Nagog Park 250 Apollo Drive
Acton, MA 01720 Chelmsford, MA 01824
Phone: +1-978-264-4900 Phone: +1-978-244-3051
EMail: btownsend@tenornetworks.com EMail: tnadeau@cisco.com
Darek Skalecki
Nortel Networks
3500 Carling Ave,
Nepean K2H 8E9
Phone: +1-613-765-2252
EMail: dareks@nortelnetworks.com
Le Faucheur Experimental [Page 3]
RFC 4127 Russian Dolls Model for DS-TE June 2005
3. Definitions
For readability a number of definitions from [DSTE-REQ] are repeated
here:
Class-Type (CT): the set of Traffic Trunks crossing a link that is
governed by a specific set of bandwidth constraints.
CT is used for the purposes of link bandwidth
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