Forwarding and Control Element Separation (ForCES) Forwarding Element Model
RFC 5812
| Document | Type |
RFC - Proposed Standard
(March 2010; Errata)
Updated by RFC 7408
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-anderson-forces-model | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5812 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ross Callon | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) J. Halpern
Request for Comments: 5812 Self
Category: Standards Track J. Hadi Salim
ISSN: 2070-1721 Znyx Networks
March 2010
Forwarding and Control Element Separation (ForCES)
Forwarding Element Model
Abstract
This document defines the forwarding element (FE) model used in the
Forwarding and Control Element Separation (ForCES) protocol. The
model represents the capabilities, state, and configuration of
forwarding elements within the context of the ForCES protocol, so
that control elements (CEs) can control the FEs accordingly. More
specifically, the model describes the logical functions that are
present in an FE, what capabilities these functions support, and how
these functions are or can be interconnected. This FE model is
intended to satisfy the model requirements specified in RFC 3654.
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/rfc5812.
Halpern & Hadi Salim Standards Track [Page 1]
RFC 5812 ForCES FE Model March 2010
Copyright Notice
Copyright (c) 2010 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.
Halpern & Hadi Salim Standards Track [Page 2]
RFC 5812 ForCES FE Model March 2010
Table of Contents
1. Introduction ....................................................5
1.1. Requirements on the FE Model ...............................5
1.2. The FE Model in Relation to FE Implementations .............6
1.3. The FE Model in Relation to the ForCES Protocol ............6
1.4. Modeling Language for the FE Model .........................7
1.5. Document Structure .........................................8
2. Definitions .....................................................8
3. ForCES Model Concepts ..........................................10
3.1. ForCES Capability Model and State Model ...................12
3.1.1. FE Capability Model and State Model ................12
3.1.2. Relating LFB and FE Capability and State Model .....14
3.2. Logical Functional Block (LFB) Modeling ...................14
3.2.1. LFB Outputs ........................................18
3.2.2. LFB Inputs .........................................21
3.2.3. Packet Type ........................................24
3.2.4. Metadata ...........................................24
3.2.5. LFB Events .........................................27
3.2.6. Component Properties ...............................28
3.2.7. LFB Versioning .....................................29
3.2.8. LFB Inheritance ....................................29
3.3. ForCES Model Addressing ...................................30
3.3.1. Addressing LFB Components: Paths and Keys ..........32
3.4. FE Data Path Modeling .....................................32
3.4.1. Alternative Approaches for Modeling FE Data Paths ..33
3.4.2. Configuring the LFB Topology .......................37
4. Model and Schema for LFB Classes ...............................41
4.1. Namespace .................................................42
4.2. <LFBLibrary> Element ......................................42
4.3. <load> Element ............................................44
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