1、Information technology Fibre channel Part 122: Arbitrated loop-2 (FC-AL-2)Amendment 1:2009 (IDT) toNational Standard of CanadaCAN/CSA-ISO/IEC 14165-122-06(ISO/IEC 14165-122:2005, IDT)NOT FOR RESALE.PUBLICATION NON DESTINE LA REVENTE.CSA Standards Update ServiceAmendment 1:2009 toCAN/CSA-ISO/IEC 1416
2、5-122-06October 2009Title: Information technology Fibre channel Part 122: Arbitrated loop-2 (FC-AL-2)Pagination: 7 pages (7 text)To register for e-mail notification about any updates to this publicationgo to www.ShopCSA.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update Service
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4、.0 2008-08INTERNATIONAL STANDARD Information technology Fibre channel Part 122: Arbitrated loop-2 (FC-AL-2) ISO/IEC 14165-122:2005/A1:2008(E)AMENDMENT 1 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 ISO/IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of thi
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12、nel Part 122: Arbitrated loop-2 (FC-AL-2) INTERNATIONAL ELECTROTECHNICAL COMMISSION CICS 35.200 PRICE CODEAMENDMENT 1 2 14165-122 Amend. 1 ISO/IEC(E) FOREWORD Amendment 1 to International Standard ISO/IEC 14165-122 was prepared by subcommittee 25: Interconnection of information technology equipment,
13、 of ISO/IEC joint technical committee 1: Information technology. This International Standard has been approved by vote of the member bodies, and the voting results may be obtained from the address given on the second title page. This publication has been drafted in accordance with the ISO/IEC Direct
14、ives, Part 2. Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-0614165-122 Amend. 1 ISO/IEC(E) 3 INTRODUCTION to Amendment 1 Since the publication of ISO/IEC 14165-122:2005 (FC-AL) important technical corrections have been developed. FC-AL-2 defines a method for the operation of a FC arbitrated loop. Th
15、is amendment revises the base document, FC-AL-2, with respect to some inconsistencies found since approval of the base document. This amendment contains the following changes: the transmission word delay through an L_Port is changed from 6 words to 12 words to accommodate higher fibre channel speeds
16、; for example, 8 Gbit/s and 16 Gbit/s. the OPEN state is corrected to assure fairness for an L_Port that is using the TRANSFER state while another L_Port is using ARBf. Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-06 4 14165-122 Amend. 1 ISO/IEC(E) Page 34 8.0 Overview Replace the existing text of t
17、he second pagagraph (below the three dashed items) by the following: The maximum delay of a Transmission Word through an L_Port in the MONITORING or ARBITRATING state should not exceed twelve (12) Transmission Word periods. See 8.2.2 for maximum round trip latency and Annex A for L_Port Elasticity b
18、uffer management. Page 37 8.2.3 Loop timeout Replace the existing text of this subclause by the following new text: The Loop timeout value (LP_TOV) is 2 s. LP_TOV is used to keep a Loop from deteriorating due to protocol errors or lost Ordered Sets. For example, LP_TOV is used to reset the fairness
19、window (see 4.3) and during the INITIALIZATION process to time start-up events (see 10.5.4). Page 44 13 State 0 (MONITORING) actions Replace the third paragraph including its dashed items by the following new paragraph: If Idle is received, the CFW shall be modified as follows: if REPEAT is FALSE(0)
20、 and: if ARBf_SENT is FALSE(0), the CFW shall be set to Idle and ACCESS shall be set to TRUE(1) or if ARBf_SENT is TRUE(1), the CFW shall be set to ARB(FF) and ACCESS shall be set to TRUE(1). if REPEAT is TRUE(1), the CFW shall be set to Idle. Page 49 16 State 3 (OPEN) actions Replace the existing t
21、ext beginning with the NOTE below the first paragraph to, and including, the NOTE following the 10thparagraph by the following: NOTE 1 The six (6) Ordered Sets maintain the FC-FS spacing before SOF; R_RDYs allow the OPENED L_Port to transmit frame(s) without using BB_Credit. One R_RDY does not take
22、any extra bandwidth. The L_Port shall process, and shall not retransmit subsequent Transmission Words received on its inbound fibre. The L_Port shall transmit Primitive Signals, Primitive Sequences, or frames as specified in FC-PH (see 8.3.4). If Idle is received, the CFW shall be set to Idle and AC
23、CESS shall be set to TRUE(1). If ARB(F0) is received, the CFW shall be set to Idle and XMIT_2_IDLES shall be set to TRUE(1). Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-0614165-122 Amend. 1 ISO/IEC(E) 5 NOTE 2 Receiving ARB(F0) indicates that no other L_Port is now arbitrating (i.e., no L_Port chan
24、ged ARB(F0) to ARB(val). If ARB(FF) is received, the CFW shall be set to ARB(FF) and ACCESS shall be set to TRUE(1). If a Fill Word is to be transmitted, the CFW shall be used. NOTE 3 Since ARB_WON is TRUE(1) in this state, XMIT_2_IDLES will not be set to FALSE(0). If CLS is received, the LPSM shall
25、 make the transition to the RECEIVED CLOSE state (see item 9 and item 19). If MRKtx is received, where the MK_TP and AL_PS match the expected values, the action identified by MK_TP shall be performed. The received MRKtx shall not be retransmitted. If REPLICATE is TRUE(1) and the L_Port requests a br
26、oadcast replicate (REQ(open fr) or another selective replicate REQ(open yr), the LPSM shall transmit OPN(fr) or one OPN(yr) for each request at the next appropriate Fill Word, respectively. If ACCESS is TRUE(1) and the L_Port requests a transfer (REQ(transfer), the LPSM shall transmit CLS instead of
27、 the appropriate Fill Word and then shall make the transition to the TRANSFER state (see item 10 and item 20). If ACCESS is FALSE(0), the request to transfer is treated as a request to close. If a Class 1 connection exists, the L_Port shall remove the Class 1 connection before transmitting CLS; only
28、 the L_Port which received EOFdt shall transmit the first CLS. The LPSM may begin to close the Loop (REQ(close) or REQ(send DHD) by transmitting CLS or DHD instead of the next appropriate Fill Word. If CLS is transmitted, the LPSM shall make the transition to the XMITTED CLOSE state or the TRANSFER
29、state. If DHD is transmitted, the LPSM shall remain in the OPEN state, shall set DUPLEX to FALSE(0) and shall not transmit Data frames. If a Class 1 connection exists, the L_Port shall remove the Class 1 connection before transmitting CLS; only the L_Port which received EOFdt shall transmit CLS (see
30、 item 8 and item 18 or item 20). NOTE 4 Reasons for transmitting CLS or DHD include, but are not limited to: ARB(val) was detected to indicate that another L_Port is arbitrating (the OPEN L_Port may close the Loop at a convenient time); frame transmission is required with a different L_Port; the L_P
31、ort has not received any credit to transmit frames before a timeout occurred (an appropriate value would be AL_TIME since this L_Port is the originator of the Loop circuit); there are no additional frames to transmit to the other L_Port; or, the L_Port is making the transition to the Non-Participati
32、ng mode. Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-06 6 14165-122 Amend. 1 ISO/IEC(E) Page 61 Table 4 MONITORING (State 0) transitions Replace the first four sections of this table (the entire table on page 61) by the following new table: ACCESS := N/C ARB_PEND := 0 ARB_WON := 0 ARBf_SENT := 0 EN
33、TRY ACTIONS DUPLEX := 0 REPLICATE := 0 CFW := N/C DHD_RCV := N/C BYPASS := N/C XMIT_2_IDLES := N/C INPUT ACTION / OUTPUT NEXT STATE LOSS of SYNC. x CFW13MONITORING Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-0614165-122 Amend. 1 ISO/IEC(E) 7 Page 70 Table 7 OPEN (State 3) transitions Insert, in the
34、 section “PRIMITIVE SIGNALS,” a new row between the rows “ARB(F0) and “ARByx”, as follows: ARB(FF) CFW := ARB(FF) ACCESS := 1 FC-2 FP/PSig/PSeq OPEN Amendment 1:2009 toCAN/CSA-ISO/IEC 14165-122-06ICS 35.200 ISO/IEC 2008 All rights reserved Copyright NoticeThis Amendment to the International Standard
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