1、ANSI INCITS 258-1997 (R2002)(formerly ANSI X3.258-1997)for Information Technology Fibre Distributed Data Interface (FDDI) Station Management-2 Isochronous Services (SMT-2-IS)AmericanNationalStandardApproval of an American National Standard requires review by ANSI that therequirements for due process
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10、t 42nd Street, New York, New York 10036Copyright 1997 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,Washington, D
11、C 20005.Printed in the United States of AmericaANSI X3.258-l 997 American National Standard for Telecommunications - Fibre Distributed Data Interface (FDDI) - Station Management-2 - Isochronous Services (SMT-2-E) Secretariat Information Technology Industry Council Approved June 6,1997 American Natio
12、nal Standards Institute, Inc. Abstract The described Station Management-2 lsochronous Services (SMT-2-E) protocol is intended for use in a high-performance multi-station network. This protocol is designed to be effective at 100 megabits per second using a Token ring architecture and optical fiber or
13、 copper twisted pair as the transmission medium over distances of several kilometers in extent. Contents Page Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . i . . . . vi 1 2 3 4 4.1 4.1 .l 4.1.2 4.1.3 4.2 5 5.1 6 6.1 6.1.1 6.1.2 6.2 6.2.1 6.2.2 6.3 6.3.1 6.3.2 6.4 6.4.1 6.4.2 6.5 7 7.1 7.2 7.3 7.3.1 7.3.2 7.3.3 7.3.4 7.3.5 7.3.6 7.3.7 7.3.8 6 8.1 8.2 8.3 8.3.1 8.3.2 6.4 ii Scope . .l Normative references . 3 Definitions . .4 Conventions and abbreviat
15、ions .7 Conventions .7 State machines 8 Addressing . . .9 Default and initial values . .9 Abbreviations .9 General description 10 Overview of SMT-2-1s functions . .10 Services .l 1 SMT-2-1s to user services . .l 1 Logical Channel primitives 11 lsochronous Service Access Point (ISAP) primitives .20 S
16、MT-2-1s to I-MAC services .25 SM-IM-CONTROL.request .25 SM-IM-SAP.request . .25 SMT-2-PS to SMT-2-1s services . 26 IS-PS-UNITDATA.request .27 IS-PS-UNITDATA.indication . 27 SMT-2-CS to SMT-2-1s services .29 IS-CS-CONTRCL.request .29 IS-CS-STATUS.indication .29 SMT to systems management services .30
17、Management information base (IS-MIB) . .32 Management Information Base (MIB) structure 32 Integrity of MIB state 33 Management information definitions . .34 MIB summary .34 Managed object class templates .35 Attribute group templates . .38 Attribute templates .39 Action templates .42 Notification te
18、mplates .42 ASN.l definitions . .43 Name Binding .45 Facilities . .45 Variables . .45 Flags . .46 Timers . .46 Timer functions . .46 Timer expiration values . .46 Signals . 47 Page 6.5 SMT frame format . .47 8.6 Resource Allocation Frames (RAF). . .48 6.7 RAF frame addressing . .48 6.6 RAF frames .
19、.48 8.8.1 Allocate Logical Channel request . .48 8.8.2 Modify Logical Channel request . .49 8.8.3 Release Logical Channel request .50 8.8.4 Logical Channel Status request . .51 6.8.5 Logical Channel response . .52 8.8.6 Refresh Logical Channel announcement .52 8.8.7 Logical Channel Event announcemen
20、t . .53 8.8.8 WBC request/response .54 8.8.9 Refresh WBC announcement . .55 8.8.10 WBC event announcement .56 8.8.11 Hybrid ring announcement . .56 8.9 SMT-2-1s frame parameters .56 8.9.1 Resource type . .56 8.9.2 CA command . .57 8.9.3 User reference . 57 8.9.4 Domain ID . .57 8.9.5 Domain instance
21、 .57 8.9.6 Logical channel ID . .57 8.9.7 Logical channel descriptor . .57 8.9.8 Owner . .57 8.9.9 New owner .58 8.9.10 Requested bandwidth ! 58 8.9.11 Minimum bandwidth 58 8.9.12 Maximum number T-Channels . .58 8.9.13 Logical channel category . .58 8.9.14 Refresh expiry . .58 8.9.15 Abort flag .58
22、8.9.16 Authentication . .58 8.9.17 Reason code . .59 8.9.18 WBCA command . -59 8.9.19 Allocation domain information .59 8.9.20 Requested WBC allocation .59 9 Operation .60 9.1 9.1.1 9.1.2 9.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.3 9.3.1 9.3.2 9.3.3 9.3.4 Overview . .60 lsochronous bandwidth managem
23、ent . .60 lsochronous service access . .61 Wide Band Channel management .62 WBC allocation and release 63 WBC status . .64 WBC refresh . .64 WBC reclamation .65 Hybrid ring management . ;. . .65 Hybrid Ring Announcement protocol .65 Logical Channel management .68 Logical Channel allocation . .69 Log
24、ical Channel modification . .71 Logical Channel release .72 Logical Channel status .73 . . . III .,. 9.3.5 9.3.6 9.3.7 9.3.8 9.3.9 9.3.10 9.4 9.4.1 9.4.2 9.4.3 9.4.4 9.4.5 9.4.6 9.5 9.6 Page Logical Channel refresh . .74 Reclamation of allocation domain bandwidth . 74 Allocation map verification . .
25、 . .75 Channel allocator recovery .76 Access control . .76 Encoding . .76 ISAP management . .76 ISAP creation .77 ISAP modification .77 ISAP deletion .78 ISAP to I-MAC binding . .78 ISAP open and close .78 ISAP enable and disable . .78 HI-SAP management . .80 I-MAC management . .80 Figures 1 SMT-2 D
26、ocument Structure . .2 2 SMT-2 Management Model .31 3 SMT Frame Format . .47 4 lsochronous Bandwidth Management Structure . ;.6 1 5 Wide Band Channel Management Operations .63 6 Hybrid Ring Announcement Transmitter state diagram . .67 7 Logical Channel Management Operations .69 Annexes A A.1 A.l.l A
27、.1.2 A.l.3 A.2 A.2.1 A.2.2 A.2.3 A.3 A.3.1 A.3.2 A.3.3 B B.l B.2 B.3 B.3.1 B.3.2 B.3.3 8.3.4 8.4 iv lsochronous bandwidth management . .81 Overview . .81 lsochronous applications . .81 Bandwidth partitioning . .81 lsochronous management hierarchy .81 Wide Band Channel Allocator (WBCA) 83 Resource ma
28、nagement policies . .83 Packet/lsochronous Partitioning Policy .83 lsochronous WBC allocation policy .84 Channel allocators . .85 Channel allocation policies .85 CA call set-up involvement .86 Standby CAs (exemplary protocol). .87 Call Signalling . .88 Overview . .88 Generalized FDDI-II Call Control
29、 model . .88 Call set-up overview .91 Resource allocation phase . .91 Call set-up agreement phase . .93 Connection phase . .94 Call disconnection (close down). .94 Open Application Interfaces . .94 Page B.5 Additional CC model functional integration options . .96 B.6 Video/audio conference calling .
30、99 B.6.1 Centralized MCU based video conferencing . . 100 8.6.2 Efficient FDDI-II based video conferencing 101 V Foreword (This foreword is nr$ part of American National Standard X3.258-1997.) The Fibre Distributed Data Interface (FDDI) is intended for use in a high- performance general purpose mult
31、i-node network and is designed for effi- cient operation with a peak data rate of 100 Mbit/s. It uses a Token Ring architecture with optical fibre as the transmission medium. FDDI provides for hundreds of nodes operating over an extent of tens of kilometers. Station Management (SMT) specifies the lo
32、cal portion of the system manage- ment application process for FDDI, including the control required for proper operation of a station in an FDDI ring. SMT provides services such as con- nection management, station insertion and removal, station initialization, con- figuration management, fault isola
33、tion and recovery, communications protocol for external authority, scheduling policies, and collection of statistics. The set of basic FDDI standards also includes the following standards: (a) A Media Access Control (MAC), which specifies the lower sublayer of the Data Link Layer for FDDI, including
34、 the access to the medium, addressing, data checking, and data framing; (b) A Physical Layer Media Dependent (PMD), which specifies the lower sublayer of the Physical Layer for FDDI, including the power lev- els and characteristics of the optical transmitter and receiver, interface optical signal re
35、quirements including jitter, the connector receptacle footprint, the requirements of conforming FDDI optical fibre cable plants, and the permissible bit error rates; (c) A Physical Layer Protocol (PHY), which specifies the upper sublayer of the Physical Layer for the FDDI. PHY presents the specifica
36、tions and services provided for conforming FDDI attachment devices and specifies the data encode/decode, framing, and clocking requirements. PHY also specifies the elasticity buffer, smoothing, and repeat filter functions. American National Standards for PHY (ANSI X3.148-1 988), MAC (ANSI X3.139-198
37、7), and PMD (ANSI X3.166-1990) have been approved and published,. In addition, FDDI standards are being processed as International Standards by standards committee ISO/IEC JTCl/SC 25. International Standards for PHY, MAC, and PMD (IS0 9314-1: 1989, 9314- 2: 1989 and ISO/IEC 9314-3: 1990, respectivel
38、y) have also been pub- lished. SMT is a sophisticated document specifying many critical aspects of inter- operability in a multi-vendor FDDI network. It has proven to be by far the most difficult of the set of basic FDDI standards to complete with the work on SMT requiring a high degree of cooperati
39、on between competing manu- facturers of FDDI equipment. An American National Standard for SMT (ANSI X3.229-l 994), representing the final standard in the set of basic FDDI standards was approved by X3T9 technical letter ballot and forwarded to X3 for approval as an ANS by the June 1992 X3T9 meeting.
40、 The standard proposed herein is part of an effort to enhance this basic SMT standard. Two extensions to the basic FDDI have been approved as American National Standards and are in print. The first (ANSI X3.186-1992), for Hybrid Ring Control (HRC), commonly known as FDDI-II, extends the capa- bility
41、 of FDDI to handle isochronous data streams at a multiplicity of data vi rates. The second (ANSI X3.184-1993), for a single mode optical fibre ver- sion of PMD (SMF-PMD), permits optical links of up to 60 km. Both are being processed as International Standards by ISO/IEC JTCiISC25. Other work curren
42、tly in process, addressing alternate PMDs, is aimed at providing low-cost attachments for use in concentrator-to-workstation envi- ronments. These standards will be for a Low-Cost Fibre PMD (LCF-PMD) and a Twisted Pair PMD (TP-PMD). The LCF-PMD was approved by tech- I nical letter ballot and forward
43、ed to X3 for approval as an ANS by the August X3T9 meeting. In addition, work is also underway toward direct attachment of FDDI to SONET links. The FDDI-II enhancement (HRC, ANSI X3.186-1992) referred to above, requires enhancements to the basic PHY, MAC and SMT standards for FDDI. These enhancement
44、 standards are known as PHY-2, MAC-2 and SMT-2, respectively. The enhanced standards, PHY-2, MAC-2, and SMT-2 are each required to be interoperable with the corresponding basic FDDI standard when the FDDI network is operating in the basic mode, and furthermore, it is intend- ed that PHY, MAC, and SM
45、T shall remain supported standards. Standards for PHY-2 (ANSI X3.231-1994) and MAC-2 (ANSI X3.239-1994), are complete. Each document has been approved by X3 and forwarded to the International Organization for Standardization (ISO) for approval as a Draft International Standard. Work on SMT-2, the en
46、hanced version of SMT necessary for FDDI-II, has been divided into three separate projects as follows: (a) SMTP Common Services (SMTP-CS) is based on the common ser- vices portion of the basic SMT. This work is being done under project 961 D. (b) SMT-2 lsochronous Services (SMT-2-1s) is new work req
47、uired to support the isochronous data streams offered by FDDI-II. This work is being done under project 962D. (c) SMTQ Packet Services (SMT-2-PS) is based on the packet services portion of the basic SMT. This work is being done under project 963D. This standard has two annexes, both of which are inf
48、ormative and are not part of the standard. Requests for interpretation, suggestions for improvement or addenda, or defect reports are welcome. They should be sent to National Committee for Information Technology Standards (NCITS), ITI, 1250 Eye Street, NW, Suite 200, Washington, DC 20005 This standa
49、rd was processed and approved for submittal to ANSI by NCITS. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, NCITS had the following members. James D. Converse, Chair Karen Higginbottom, Vice-Chair Kate McMillan, Secretary Organization Represented Name of Representative AMP, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ben Bennett Edward Kelly (Alt.) vii Organization Represented
