Internet Engineering Task Force (IETF) W. Wang
Request for Comments: 6956 Zhejiang Gongshang University
Category: Standards Track E. Haleplidis
ISSN: 2070-1721 University of Patras
K. Ogawa
NTT Corporation
C. Li
Hangzhou DPtech
J. Halpern
Ericsson
June 2013
Forwarding and Control Element Separation (ForCES)
Logical Function Block (LFB) Library
Abstract
This document defines basic classes of Logical Function Blocks (LFBs)
used in Forwarding and Control Element Separation (ForCES). The
basic LFB classes are defined according to the ForCES Forwarding
Element (FE) model and ForCES protocol specifications; they are
scoped to meet requirements of typical router functions and are
considered the basic LFB library for ForCES. The library includes
the descriptions of the LFBs and the XML definitions.
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/rfc6956.
Wang, et al. Standards Track [Page 1]RFC 6956 ForCES LFB Library June 2013Copyright Notice
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Table of Contents
1. Introduction ....................................................3
2. Terminology and Conventions .....................................4
2.1. Requirements Language ......................................4
2.2. Definitions ................................................4
3. Overview ........................................................6
3.1. Scope of the Library .......................................6
3.2. Overview of LFB Classes in the Library .....................8
3.2.1. LFB Design Choices ..................................8
3.2.2. LFB Class Groupings .................................9
3.2.3. Sample LFB Class Application .......................10
3.3. Document Structure ........................................11
4. Base Types .....................................................11
4.1. Data Types ................................................13
4.1.1. Atomic .............................................13
4.1.2. Compound Struct ....................................13
4.1.3. Compound Array .....................................14
4.2. Frame Types ...............................................14
4.3. Metadata Types ............................................15
4.4. XML for Base Type Library .................................16
5. LFB Class Descriptions .........................................41
5.1. Ethernet-Processing LFBs ..................................42
5.1.1. EtherPHYCop ........................................42
5.1.2. EtherMACIn .........................................44
5.1.3. EtherClassifier ....................................46
5.1.4. EtherEncap .........................................48
5.1.5. EtherMACOut ........................................50
5.2. IP Packet Validation LFBs .................................52
5.2.1. IPv4Validator ......................................52
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