ANSI-INCITS-372-2003.pdf
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1、American National Standard Developed by ANSI INCITS 372-2003 for Information Technology Fibre Channel Backbone (FC-BB-2) ANSI INCITS 372-2003 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resal
2、e, 04/29/2007 13:07:30 MDTNo reproduction 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 13:07:30 MDTNo reproduction or
3、networking permitted without license from IHS -,-,- ANSI INCITS 372-2003 American National Standard for Information Technology Fibre Channel Backbone (FC-BB-2) Secretariat Information Technology Industry Council Approved July 25, 2003 American National Standards Institute, Inc. Abstract This standar
4、d defines the functions and mappings 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,
5、04/29/2007 13:07:30 MDTNo reproduction 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 est
6、ablished when, in the judgement 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 b
7、e considered, and that a concerted 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 produ
8、cts, processes, or procedures not 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
9、of an American National Standard 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
10、 at any time. The procedures of 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 S
11、tandards Institute. American National Standard Published by American National Standards Institute, Inc. 25 West 43rd Street, New York, NY 10036 Copyright 2003 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electr
12、onic retrieval system or otherwise, 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 d
13、isclose such patents to the publisher. 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 m
14、ay be required for the implementation 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
15、 this standard. 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 13:07:30 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Foreword.ix 1
16、Scope. 1 2Normative References. 3 2.1Overview 3 2.2Approved references . 3 2.3References under development. 3 2.4Other references 3 3Definitions and Conventions 5 3.1Common definitions. 5 3.2FC-BB-2_ATM Definitions . 6 3.3FC-BB-2_SONET Definitions. 8 3.4FCIP and TCP/IP Definitions. 9 3.5Editorial co
17、nventions 10 3.6List of commonly used acronyms and abbreviations. 11 3.6.1General 11 3.6.2FC-BB-2_ATM. 12 3.6.3FC-BB-2_SONET 12 3.6.4FC-BB-2_IP . 12 3.7Symbols. 13 3.8Keywords. 13 4FC-BB-2 Structure and Concepts 15 4.1FC-BB-2 Backbone Mappings. 15 4.2FC-BB-2 Reference Models. 15 4.3FC-BB-2 Specifica
18、tions Overview 16 4.3.1FC-BB-2_ATM. 16 4.3.2FC-BB-2_SONET 17 4.3.3FC-BB-2_IP . 17 4.4FC-BB-2 Requirements . 17 4.4.1Fibre Channel Class support. 17 4.4.2Payload transparency 18 4.4.3Latency delay and timeout value. 18 4.4.4QoS and Bandwidth. 18 4.4.5In-order delivery. 18 4.4.6Flow control . 18 4.5FC
19、-BB-2 Link Service Codes. 19 5FC-BB-2_ATM and FC-BB-2_SONET messages and formats . 20 5.1Applicability 20 5.2Message Formats 20 5.2.1LLC/SNAP Header format . 20 5.2.2BBW_Header format 21 5.2.3BBW message payload format for SFC. 22 5.2.4BBW message payload format for SR. 22 5.2.4.1SR_Header Formats 2
20、2 5.2.4.1.1Field Formats. 22 5.2.4.1.2Information transfer I-format 23 5.2.4.1.3Supervisory S-format. 24 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 13:07:30 MDTNo reproduc
21、tion or networking permitted without license from IHS -,-,- ii Page 5.2.4.1.4Unnumbered U-format. 24 5.2.4.2SR_BBW messages 24 5.2.4.3Format Field Parameters. 25 5.2.4.3.1Modulus of SR. 25 5.2.4.3.2Send state variable V(S) 25 5.2.4.3.3Send Sequence Number N(S). 25 5.2.4.3.4Receive State Variable V(R
22、) 25 5.2.4.3.5Receive Sequence Number N(R) 25 5.2.4.3.6Functions of the Poll/Final Bit (P/F). 25 5.2.4.4SR Commands and Responses 25 5.2.4.4.1Information (SR_I) command 25 5.2.4.4.2Receive Ready (SR_RR) Command and Response. 26 5.2.4.4.3Receive Not Ready (SR_RNR) Command and Response 26 5.2.4.4.4Sel
23、ective Reject (SR_SREJ) Response 26 5.2.4.4.5Set Mode (SR_SM) Command 27 5.2.4.4.6Disconnect (SR_DISC) Command 27 5.2.4.4.7Unnumbered Acknowledgement (SR_UA) Response. 28 5.2.4.4.8Disconnected Mode (SR_DM) Response 28 5.2.4.4.9Message Reject (SR_FRMR) Response. 28 5.2.4.5Exception condition reportin
24、g and recovery 28 5.2.4.5.1Exception Conditions. 28 5.2.4.5.2Busy Condition 29 5.2.4.5.3N(S) Sequence Error Condition. 29 5.2.4.5.3.1SR_SREJ recovery 30 5.2.4.5.3.2Time-out Recovery 30 5.2.4.5.4Invalid message condition . 30 5.2.4.5.5Message rejection condition 30 6The SR and SFC Protocol Procedures
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