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1、ANSI INCITS 342-2001 (formerly ANSI NCITS 342-2001) for Information Technology Fibre Channel Backbone (FC-BB) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo rep
2、roduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking permitted without lic
3、ense from IHS -,-,- ANSI NCITS 342-2001 American National Standard for Information Technology Fibre Channel Backbone (FC-BB) Secretariat Information Technology Industry Council Approved November 30, 2001 American National Standards Institute, Inc. Abstract This standard defines the functions and map
4、pings necessary to bridge or tunnel between physically sep- arate instances of the same network definition. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo repro
5、duction or networking permitted without license from IHS -,-,- Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgement
6、 of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concer
7、ted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures n
8、ot conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standar
9、d in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of
10、 the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American Na
11、tional Standard Published by American National Standards Institute, Inc. 25 West 43rd Street, New York, NY 10036 Copyright 2001 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherw
12、ise, without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America CAUTION: The developers of this standard have requested that holders of patents that may be required for the implementation of the standard disclose such patents to the pub
13、lisher. However, neither the developers nor the publisher have undertaken a patent search in order to identify which, if any, patents may apply to this standard. As of the date of publication of this standard and following calls for the identification of patents that may be required for the implemen
14、tation of the standard, no such claims have been made. No further patent search is conducted by the de- veloper or publisher in respect to any standard it processes. No representation is made or implied that licenses are not required to avoid infringement in the use of this standard. Copyright Ameri
15、can National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Forewordv 1Architecture and Scope 1 1.1Organ
16、ization. 2 2Normative References. 3 2.1Approved references 3 2.2References under development. 3 2.3Other references 3 3Definitions and conventions. 4 3.1Common Definitions. 4 3.2ATM Definitions 5 3.3SONET Definitions. 6 3.4Editorial conventions 8 3.4.1Binary notation. 8 3.4.2Hexadecimal notation 8 3
17、.5Abbreviations, acronyms, and symbols . 8 3.5.1List of Commonly used Acronyms and abbreviations 8 4FC-BBW Structure and Concepts 11 4.1FC-BBW Models 11 4.2Inter-AR FC-BBW Reference Model 11 4.3Intra-AR FC-BBW Reference Model 12 4.4FC-BBW Service Requirements 13 4.5FC-BBW Initialization. 14 4.6FC-BB
18、W Protocol and Messages 14 5FC-BBW_ATM Structure and Concepts 15 5.1FC-BBW_ATM Reference Models and Overview 15 5.2FC-BBW_ATM Functional Model. 16 5.2.1Fibre Channel Network Interface. 16 5.2.2ATM Network Interface 16 5.2.3Mapping. 16 5.2.4Encapsulation using AAL5. 17 5.2.5FC-BBW_ATM Routing 17 5.2.
19、6Call Handling 17 5.2.7Frame Handling . 18 5.2.8Simple Flow Control (SFC) 18 5.2.9SR Flow Control and Error Recovery. 18 5.2.10R_RDY Flow Control 18 6FC-BBW Messages and Formats 20 6.1Common BBW_Header Formats. 20 6.2SFC Message Formats 21 6.3SR Message Formats 22 6.3.1SR_Header Format 22 6.3.2Funct
20、ions of the Poll/Final bit. 25 6.3.3Disconnect (SR_DISC) command . 27 6.3.4Unnumbered Acknowledgement (SR_UA) response. 28 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58
21、:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Page 6.3.5Message reject (SR_FRMR) response 28 6.3.6Exception condition reporting and recovery. 29 7The SR Protocol Procedures. 32 7.1SR Protocol Overview 32 7.2Description of the SR procedure 33 7.2.1SR mode of operati
22、on 33 7.2.2SR procedure for addressing. 33 7.2.3SR procedure for the use of the P/F bit . 33 7.2.4SR procedure for data link set-up and disconnection 33 7.2.5Procedures for information transfer using multi-selective reject 36 7.2.6SR conditions for data link resetting or data link re-initialization
23、(data link set-up) 41 7.2.7SR procedure for data link resetting 42 7.2.8List of SR system parameters 43 8Mapping and Message Encapsulation using AAL5 . 45 9FC-BBW_ATM Service Considerations. 48 9.1Latency Delay and Timeout Value Considerations 48 9.2Bandwidth Sharing and Allocation. 48 9.3Quality of
24、 Service (QoS) 48 9.4Delivery Order 49 9.5Loss and Flow Control. 50 10FC-BBW_SONET Structure and Concepts . 51 10.1FC-BBW_SONET Reference Models and Overview. 51 10.2FC-BBW_SONET Functional Model 52 10.2.1Fibre Channel Network Interface. 52 10.2.2SONET Network Interface . 52 10.2.3Mapping. 53 10.2.4
25、Encapsulation using HDLC-like framing 53 10.2.5FC-BBW_SONET Routing. 54 10.2.6Call Handling . 54 10.2.7Frame Handling . 54 10.2.8Simple Flow Control (SFC) 54 10.2.9SR Flow Control and Error Recovery 54 10.2.10R_RDY Flow Control . 55 11Message Encapsulation using HDLC-like Framing . 56 11.1Mapping HD
26、LC Frames to SONET/SDH. 61 12FC-BBW_SONET Service Considerations 63 12.1Latency Delay and Timeout Value. 63 12.2Delivery Order 63 12.3Loss and Flow Control. 63 Tables 1Guide to FC-BB Specification. 2 2LLC/SNAP Header . 20 3LLC/SNAP PID. 20 Copyright American National Standards Institute Provided by
27、IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Page 4BBW_Header21 5Flow Control Protocol Type Encodings.21 6BBW Message Structure 21 7BBW Message Pa
28、yload Structure with SFC.21 8SR_BBW Message Structure .22 9SR_Header Format.22 10SS bits encoding.23 11MMMMM bit encoding 23 12SR_BBW Messages .23 13SR_I Message Format26 14SR_SREJ Payload Format .27 15SR_FRMR Payload Format28 16Mapping of FC-BBW Messages to AAL5 CPCS.45 17ATM VBR-NRT Service Specif
29、ication.49 18SONET/SDH Data Rates52 19Mapping of BBW Messages to HDLC Format 56 Figures 1FC-BBW_ATM Reference Model1 2FC-BBW_SONET Reference Model.1 3The Current Inter-AR FC-BBW Reference Model.11 4Protocol Levels involved in moving frames end-to-end across ARs.12 5The Current Intra-AR FC-BBW Refere
30、nce Model.12 6Protocol Levels involved in moving frames end-to-end inside an AR.13 7FC-BBW_ATM Reference Model15 8FC-BBW_ATM Functional Block Diagram19 9SR Flow Control Protocol Between two FC-BBWs.32 10AAL5 Mapping of a BBW Message using SFC.46 11AAL5 Mapping of a BBW Message using SR.47 12Recommen
31、ded ATM Bandwidth Allocation for multiple VCs48 13FC-BBW_SONET Reference Model.51 14FC-BBW_SONET Functional Block Diagram .55 15HDLC Frame Format 57 16Encapsulation of BBW Message into HDLC Frame using SFC59 17Encapsulation of BBW Message into HDLC Frame using SR60 18SONET SPE HDLC Mapping Example.6
32、1 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Page 19Path Signal label: C2 62 20BBW_SO
33、NET Protocol Stack. 62 Annexes AEncoded SOF and EOF Ordered Sets. 64 BATM Traffic Management. 67 CATM Signaling 75 DSR Protocol Parameter Guidelines. 78 ESR Protocol State Diagram 79 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/111111
34、1001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- v Foreword (This foreword is not part of ANSI NCITS 342-2001.) This Fibre Channel Backbone standard (FC-BB) defines the functions and mappings necessary to bridge
35、 (tunnel) between physically separate instances of the same net- work definition. This standard was developed by Task Group T11.3 of the National Committee for In- formation Technology Standards (NCITS) during 1996. The standards approval pro- cess started in 1997. This standard contains five annexe
36、s. Annex A is normative and is considered part of the text. Annexes B through E are informative and are not considered part of the text. Requests for interpretation, suggestions for improvement or addenda, or defect re- ports are welcome. They should be sent to the NCITS Secretariat, Information Tec
37、h- nology Industry Council, 1250 Eye Street, NW, Suite 200, Washington, DC 20005. This standard was processed and approved for submittal to ANSI by NCITS. Com- mittee approval of this standard does not necessarily imply that all committee mem- bers voted for its approval. At the time it approved thi
38、s standard, NCITS had the following members: Karen Higginbottom, Chair Russ Richards, Vice-Chair Jim Ryland, Secretary Organization Represented Name of Representative Apple Computer, Inc.David Michael Wanda Cox (Alt.) Bull HN Information Systems, Inc.Randall Kilmartin Hewlett-Packard Company.Karen H
39、igginbottom Scott Jameson (Alt.) Steve Mills (Alt.) Hitachi.John Neumann Harukazu Miyamoto (Alt.) IBM Corporation .Ronald F.Silletti Chuck Adams (Alt.) Institute for Certification of Computer Professionals.Kenneth M.Zemrowski Thomas Kurihara (Alt.) Interdigital.Clyde Camp Lucent Technologies, IncHer
40、bert Bertine Tom Rutt (Alt.) Microsoft Corporation .Mike Ksar Joseph Zajaczkowski (Alt.) National Institute of Standards User-Network Interface (UNI) Layer 3 Specification for Basic Call/Connection Control. 19 ITU-T Q.2971 (1995), Broadband Integrated Services Digital Network (B-ISDN) Digital Sub- s
41、criber Signaling System No. 2 (DSS2); User-Network Interface (UNI) Layer 3 Specification for Point-to-Multipoint Call/Connection Control. 20 ITU-T Recommendation G.708, Network Node Interface for the Synchronous Digital Hierarchy, 1993. 21 ITU-T Recommendation G.709, Synchronous Multiplexing Structu
42、re, 1993. 22 IETF RFC 1619, PPP over SONET/SDH, May 1994. 23 IETF RFC 1662, PPP in HDLC-like Framing, July 1994. 3Definitions and conventions 3.1Common Definitions 3.1.1Autonomous Region (AR): FC-SW-2 defines Autonomous Regions (ARs) as regions that consist of a network of FC Switches that all use a
43、 common method for Domain ID assignment and all use a common Path Selection protocol. The AR boundary is administratively defined, with each AR encompassing one or more Fibre Channel Address Domains. 3.1.2B_Port: A Bridge port on a device that implements FC-BBW and connects to a Switch 3.1.3BSW: Def
44、ined in FC-SW-2 and used as a generic term for a backbone Switch 3.1.4E_Port: As defined in FC-SW-2, a Fabric expansion port which attaches to another E_Port to create an Inter-Switch Link. 3.1.5Fabric Initialization: A process for configuring and building a Fabric, as defined in FC-SW-2. 3.1.6FC-BB
45、W_ATM: An ATM WAN interface specification that interfaces with Fibre Channel Switches on one side and ATM on the other. 3.1.7FC-BBW_SONET/SDH: A SONET/SDH WAN interface specification that interfaces with Fibre Channel Switches on one side and SONET/SDH on the other. 3.1.8N_Port: As defined in FC-PH
46、(see reference 4). In this standard, an N_Port is always assumed to refer to a direct Fabric-attached port, and does not include NL_Ports. 3.1.9NL_Port: A link to one N_Port and 0 or 1 FL_Port. 3.1.10Simple Flow Control (SFC): A mechanism wherein 2 bytes in the PAUSE field in the BBW_ Header carries
47、 a non-zero value indicating the number of 512-bit time units to pause transmission. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:58:44 MDTNo reproduction or networking p
48、ermitted without license from IHS -,-,- ANSI NCITS 342-2001 5 3.1.11SR Flow Control: Selective Retransmission sliding window Flow Control Protocol applied between two BBW_ATM devices used for both flow control and error recovery. 3.1.12WAN Interface: An interface which connects to a Wide Area Network; specifically, a port which connects to ATM or SONET/SDH. 3.2ATM Definitions 3.2.1AAL: ATM Adaptation Layer. A collection of standardized protocols that adapt user traffic to 48-octet payloads th