Forwarding and Control Element Separation (ForCES) Logical Function Block (LFB) Library
RFC 6956

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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 2013

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.

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
           5.2.2. IPv6Validator ......................................54

Wang, et al.                 Standards Track                    [Page 2]