1、American National StandardDeveloped byfor Information Technology Fibre Channel Framing and Signaling-2Amendment 1 (FC-FS-2/AM1)ANSI INCITS 424-2007/AM1-2007ANSIINCITS424-2007/AM1-2007ANSIINCITS 424-2007/AM1-2007(Supplement toANSI INCITS 424-2007)American National Standardfor Information Technology F
2、ibre Channel Framing and Signaling-2Amendment 1 (FC-FS-2/AM1)SecretariatInformation Technology Industry CouncilApproved August 9, 2007 American National Standards Institute, Inc.AbstractThis amendment to standard ANSI INCITS 424-2007 (Fibre Channel - Framing and Signaling - 2)describes the increment
3、al framing and signaling requirements for scrambling frames on Fibre Channellinks. This amendment is relevant to implementations of Fibre Channel links for which the Fibre Channel- Physical Interfaces - 4 (FC-PI-4) standard recommends or requires Frame Scrambling. It augments butdoes not replace exi
4、sting Fibre Channel standards.Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Revie
5、w, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resoluti
6、on.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American N
7、ational Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards I
8、nstitute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that
9、 action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Inst
10、itute, Inc.25 West 43rd Street, New York, NY 10036Copyright 2007 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW, W
11、ashington, DC 20005. Printed in the United States of AmericaCAUTION: The developers of this standard have requested that holders of patents that may berequired for the implementation of the standard disclose such patents to the publisher. However,neither the developers nor the publisher have underta
12、ken a patent search in order to identifywhich, if any, patents may apply to this standard. As of the date of publication of this standardand following calls for the identification of patents that may be required for the implementation ofthe standard, no such claims have been made. No further patent
13、search is conducted by the de-veloper or publisher in respect to any standard it processes. No representation is made or impliedthat licenses are not required to avoid infringement in the use of this standard.iContentsPageForeword ii1 Scope 12 References 12.1 Qualification and availability of refere
14、nces 12.2 Approved references . 22.3 References under development 23 Definitions, abbreviations, conventions and keywords . 33. Definitions . 33.2 Editorial conventions . 43.3 Abbreviations, acronyms, and symbols 53.3.1 Acronyms and other abbreviations . 53.4 Keywords 54 Frame Scrambling . 7Tables1
15、Comparison of ISO and American numbering conventions 4A.1 Scrambled Frame Example 18FiguresA.1 Serial Implementation of a Scrambler 8A.2 Serial Implementation of a Descrambler 8A.3 Parallel Implementation of a Scrambler . 9A.4 Parallel Implementation of a Descrambler . 10Annexes A Frame Scrambling .
16、 8A.1 Serial Frame Scrambling and Descrambling Implementations . 8A.2 Parallel Frame Scrambling and Descrambling Implementations 9A.3 Scrambler and Descrambler Implementations in C 13A.4 Scrambler and Descrambler Implementation with XORs 17A.5 Scrambled Data Example . 18B Incorporating this amendmen
17、t into FC-FS-2 . 19iiForeword (This foreword is not part of American National Standard ANSI INCITS424-2007/AM1-2007.)The INCITS Fibre Channel (T11) Technical Committee, a member body of AccreditedStandards Committee INCITS, developed this amendment during 2006. Thestandards approval process started
18、in 2006. This document includes two annexesthat are informative, and are not considered part of the standard.Requests for interpretation, suggestions for improvement or addenda, or defectreports are welcome. They should be sent to the InterNational Committee for Infor-mation Technology (INCITS), 125
19、0 Eye Street, NW, Suite 200, Washington, DC20005.Users of this standard are encouraged to determine if there are standards in devel-opment or new versions of this standard that may extend or clarify technical infor-mation contained in this standard.This standard was processed and approved for submit
20、tal to ANSI by INCITS.Committee approval of the standard does not necessarily imply that all committeemembers voted for its approval. At the time it approved this standard, INCITS hadthe following members:Karen Higginbottom, ChairJennifer Garner, SecretaryOrganization Represented Name of Representat
21、iveAIM Global Dan MullenCharles Biss (Alt.)Apple Computer, Inc. David MichaelElectronic Industries Alliance Edward Mikoski, Jr.David Thompson (Alt.)EMC Corporation Gary RobinsonFarance, Inc Frank FaranceTimothy Schoechle (Alt.)GS1 US Frank SharkeyJames Chronowski (Alt.)Mary Wilson (Alt.)Hewlett-Pack
22、ard Company. Karen HigginbottomSteve Mills (Alt.)Scott Jameson (Alt.)IBM Corporation . Ronald F. SillettiPeter Schirling (Alt.)IEEE . Judith GormanTerry DeCourcelle (Alt.)Bill Ash (Alt.)Jodi Haasz (Alt.)Bob Labelle (Alt.)Intel. Philip WennblomDave Thewlis (Alt.)Jesse Walker (Alt.)Grace Wei (Alt.)Lex
23、mark International . Don WrightDwight Lewis (Alt.)Paul Menard (Alt.)Microsoft Corporation . Jim HughesDon Stanwyck (Alt.)Isabelle Valet-Harper (Alt.)National Institute of Standards b) approved international and regional standards (ISO and IEC); andc) approved foreign standards (including JIS and DIN
24、).AMERICAN NATIONAL STANDARD ANSI INCITS 424-2007/AM1-2007American National Standardfor Information Technology Fibre Channel Framing and Signaling-2Amendment 1 (FC-FS-2/AM1)ANSI INCITS 424-2007/AM1-20072For further information, contact the ANSI Customer Service Department:Phone +1 212-642-4900Fax +1
25、 212-302-1286Web http:/www.ansi.orgE-mail ansionlineansi.orgor the InterNational Committee for Information Technology Standards (INCITS):Phone 202-626-5738Web http:/www.incits.orgE-mail incitsitic.orgCopies of standards in development may be obtained from the developing organization or from Global E
26、ngineeringDocuments:Phone: (800) 854-7179Post: 15 Inverness Way EastEnglewood, CO 80112-57042.2 Approved references10GFC: ISO/IEC 14165-116:2005, Fibre Channel - 10 Gigabit (10GFC) ANSI INCITS 364-2003FC-FS-2: ISO/IEC 14165-252, Fibre Channel - Framing and Signaling (FC-FS-2) ANSI/INCITS 424-20062.3
27、 References under developmentFC-PI-4: ISO/IEC14165-144, Fibre Channel Physical Interfaces 4 (FC-PI-4) T11/1647-DANSI INCITS 424-2007/AM1-200733 Definitions, abbreviations, conventions and keywords3.1 Definitions3.1.1 8B10B: A transformation of bytes into characters and from characters into bytes use
28、d in Fibre Channel todecrease the probability of undetected errors and improve the electrical balance of signals on a link. See FC-FS-2.3.1.2 byte: An eight-bit entity with its least significant bit denoted as bit 0 and most significant bit as bit 7. Themost significant bit is shown on the left side
29、, unless specifically indicated otherwise.3.1.3 character: An 8B10B encoding of a data byte or control value transmitted and interpreted by the FC-1 layerof Fibre Channel. See FC-FS-2.3.1.4 decoding: Validity checking of received Transmission Characters and generation of valid data bytes andspecial
30、codes from those characters. See clause 4 and FC-FS-2.3.1.5 descrambling: Reversal of the mathematical transformation of the bits within data words that is accom-plished by Frame Scrambling (see clause 4).3.1.6 encoding: Generation of Transmission Characters from valid data bytes and special codes.
31、See clause 4and FC-FS-2.3.1.7 FC-0 level: The level in the Fibre Channel architecture and standards set that defines transmission media,transmitters, and receivers and their interfaces. See FC-PI-4.3.1.8 FC-1 level: The level in the Fibre Channel architecture and standards set that defines the trans
32、missionprotocol that includes the serial encoding, decoding, and error control. See FC-FS-2.3.1.9 frame: An indivisible unit of information used by FC-2. See FC-FS-2.3.1.10 frame content: The information contained in a frame between its SOF and EOF delimiters, excluding thedelimiters. See FC-FS-2.3.
33、1.11 Frame Scrambling: Modifying data by XORing each bit with a pattern generated by a linear feedback shiftregister to minimize repetitive character patterns. Clause 4 specifies scrambling requirements applicable to thisdocument.3.1.12 link: Two unidirectional fibres transmitting in opposite direct
34、ions and their associated transmitters andreceivers.3.1.13 Link Control Facility (LCF): A hardware facility that attaches to an end of a link and manages trans-mission and reception of data. It is contained within each FC_Port. See FC-FS-2.3.1.14 Ordered Set: A Transmission Word composed of a specia
35、l character in its first (left-most) position and datacharacters in its remaining positions. See FC-FS-2.3.1.15 receiver: The portion of a LCF dedicated to receiving an encoded bit stream from a fibre, converting this bitstream into Transmission Characters, and decoding these Transmission Characters
36、 using the rules specified bythis standard. See FC-FS-2.3.1.16 scrambling: Mathematical transformation of the bits within data words by application of Frame Scrambling(see clause 4).ANSI INCITS 424-2007/AM1-200743.1.17 special character: Any Transmission Character considered valid by the transmissio
37、n code but notequated to a valid data byte. Special characters are provided by the transmission code for use in denoting specialfunctions. See FC-FS-2.3.1.18 special code: A code that, when encoded using the rules specified by the transmission code, results in aspecial character. Special codes are t
38、ypically associated with control signals related to protocol management (e.g.,K28.5). See FC-FS-2.3.1.19 Transmission Character: Any valid or invalid encoded character transmitted across a physical interfacespecified by FC-0. Valid Transmission Characters are specified by the transmission code and i
39、nclude Data andspecial characters. See FC-FS-2.3.1.20 Transmission Word: A string of four contiguous Transmission Characters occurring on boundaries thatare zero modulo 4 from a previously received or transmitted special character. See FC-FS-2.3.1.21 transmitter: The portion of a LCF dedicated to co
40、nverting valid data bytes and special codes into Trans-mission Characters using the rules specified by the transmission code, converting these Transmission Charactersinto a bit stream, and transmitting this bit stream onto the transmission medium (optical or electrical).3.1.22 valid data byte: A str
41、ing of eight contiguous bits within FC-1 that represents a value with 0 to 255,inclusive. See FC-FS-2.3.1.23 word: A string of four contiguous bytes occurring on boundaries that are zero modulo 4 from a specifiedreference.3.2 Editorial conventionsIn this standard, a number of conditions, mechanisms,
42、 sequences, parameters, events, states, or similar terms areprinted with the first letter of each word in upper-case and the rest lower-case (e.g., Exchange, Sequence). Anylower case uses of these words have the normal technical English meanings.An alphanumeric list (e.g., a, b, c) of items indicate
43、 the items in the list are unordered. A numeric list (e.g., 1, 2, 3)of items indicate the items in the list are ordered (i.e., item 1 shall occur or complete before item 2).In case of any conflict between figures, tables, and text, the text takes precedence. Exceptions to this conventionare indicate
44、d in the appropriate sections.In all of the figures, tables, and text of this document, the most significant bit of a binary quantity is shown on theleft side. Exceptions to this convention are indicated in the appropriate sections.The ISO convention of numbering is used (i.e., the thousands and hig
45、her multiples are separated by a space). Acomma is used as the decimal point. A comparison of the American and ISO conventions is shown in table 1.Table 1 - Comparison of ISO and American numbering conventionsISO American0,6 0.63,141 592 65 3.141592651 000 1,0001 323 462,9 1,323,462.9ANSI INCITS 424
46、-2007/AM1-20075Numbers that are not immediately followed by lower-case b or h are decimal values (e.g., 25).A sequence of digits 0 or 1 immediately followed by lower-case b (e.g., 0101b) is a binary value. Spaces may beincluded in binary values to delineate byte or field boundaries (e.g., 01011 010b
47、).A sequence of digits and/or upper case letters A through F (i.e., a sequence of hexadecimal digits) immediatelyfollowed by lower-case h (e.g., FA23h) is a hexadecimal value. Spaces may be included in hexadecimal values todelineate byte or field boundaries (e.g., FD 8C FA 23h).A pair of numeric val
48、ues in any base separated by two periods represents the numeric range beginning with thefirst number and ending with the second number, including the beginning and ending numbers (e.g., “1 6”indicates the range from 1 to 6, including 1 and 6).3.3 Abbreviations, acronyms, and symbols3.3.1 Acronyms an
49、d other abbreviations mathematical modulo 2 addition applied bit by bit to the corresponding bits of two or moreequal-length bit streamsCRC Cyclic Redundancy CheckEOF End-of-FrameFC Fibre ChannelFC-0 FC-0 levelFC-1 FC-1 levelLCF Link Control FacilitySOF Start-of-FrameXOR mathematical modulo 2 addition applied bit by bit to the corresponding bits of two or moreequal-length bit streams3.4 Keywords3.4.1 expected: Used to describe the behavior of the hardware or software in the design models assumed by thisstandard. Other hardware and software design models may also be imp
