1、IEEE 802.5v-2001(Amendment toIEEE Std 802.5, 1998 Edition andIEEE Stds 802.5r and 802.5j, 1998 Edition)IEEE StandardsIEEE Standard forInformation technologyTelecommunications and information exchange between systems Local and metropolitan area networksSpecific requirementsPart 5: Token Ring access m
2、ethod andPhysical Layer specificationsAmendment 5: Gigabit Token Ring operationPublished by The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USA16 November 2001IEEE Computer SocietySponsored by theLAN/MAN Standards CommitteeIEEE StandardsPrint: SH949
3、18PDF: SS94918This amendment is an approved IEEEStandard. It will be incorporated into thebase standard in a future edition.Recognized as anAmerican National Standard (ANSI)The Institute of Electrical and Electronics Engineers, Inc.Three Park Avenue, New York, NY 10016-5997, USACopyright 2001 by the
4、 Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 14 November 2001. Printed in the United States of America.Print: ISBN 0-7381-2820-1 SH94918PDF: ISBN 0-7381-2821-X SS94918No part of this publication may be reproduced in any form, in an electronic retrieval syste
5、m or otherwise, without the prior written permission of the publisher.IEEE Std 802.5v-2001(Amendment toANSI/IEEE Std 802.5, 1998 Edition;ANSI/IEEE Std 802.5r and 802.5j, 1998 Edition)IEEE Standard forInformation technologyTelecommunications and informationexchange between systemsLocal and metropolit
6、an area networksSpecific requirementsPart 5: Token Ring access method and Physical Layer specificationsAmendment 5: Gigabit Token Ring operationSponsorLAN/MAN Standards Committeeof theIEEE Computer SocietyApproved 4 May 2001IEEE-SA Standards BoardAbstract: This amendment specifies the changes requir
7、ed to IEEE 802.5, 1999 Edition (ISO/IEC8802-5:1998 base standard), IEEE Stds 802.5r and 802.5j, 1998 Edition (ISO/IEC 8802-5:1998/Amd. 1:1998), and IEEE Std 802.5t-1999, to support 1000 Mbit/s Dedicated Token Ring (DTR) op-eration. The base standard together with Amendment 1 specifies shared and ded
8、icated (point-to-point) Token Ring operation at both 4 and 16 Mbit/s using either the TKP Access Protocol or theTXI Access Protocol. IEEE Std 802.5t-2000 extends Token Ring operation to 100 Mbit/s for theDTR C-Port and Station using the TXI Access Protocol. This standard extends Token Ring opera-tio
9、n to 1000 Mbit/s for the DTR C-Port and Station using the TXI Access Protocol. Extensions to theMedia Access Control have been made to accommodate the requirements for the 1000 Mbit/s me-dia rate.Keywords: Token Ring operation, TKP Access Protocol, TXI Access Protocol, DTR C-Port andStationIEEE Stan
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27、d. iiiIntroduction(This introduction is not part of IEEE Std 802.5v-2001, IEEE Standard for Information technologyTelecommunica-tions and information exchange between systemsLocal and metropolitan area networksSpecific requirementsPart 5: Token Ring access method and Physical Layer specificationsAme
28、ndment 5: Gigabit Token Ring operation.)This standard is part of a family of standards for local and metropolitan area networks. The relationshipbetween the standard and other members of the family is shown below. (The numbers in the figures refer toIEEE standard numbers.).This family of standards d
29、eals with the Physical and Data Link Layers as defined by the International Orga-nization for Standardization (ISO) Open Systems Interconnection Basic Reference Model (ISO/IEC 7498-1:1994). The access standards define several types of medium access technologies and associated physicalmedia, each app
30、ropriate for particular applications or system objectives. Other types are under investigation.The standards defining the technologies noted above are as follows: IEEE Std 8021: Overview and Architecture. This standard provides an overview to the family of IEEE 802Standards. This document forms part
31、 of the IEEE 802.1 scope of work. ANSI/IEEE Std 802.1B LAN/MAN Management. Defines an Open Systemsand 802.1K Interconnection (OSI) management-compatible architecture,ISO/IEC 15802-2: and services and protocol elements for use in a LAN/MAN environment for performing remote management. ANSI/IEEE Std 8
32、02.1D Medium Access Control (MAC) Bridges. Specifies an architec-ture and protocol for the ISO/IEC 15802-3:interconnection of IEEE 802 LANs below the MAC service boundary. ANSI/IEEE Std 802.1E System Load Protocol. Specifies a set of services and protocol ISO/IEC 15802-4: for those aspects of manage
33、ment concerned with the loading of systems on IEEE 802 LANs.1The IEEE 802 Architecture and Overview Specification, originally known as IEEE Std 802.1A, has been renumbered asIEEE Std 802. This has been done to accommodate recognition of the base standard in a family of standards. References toIEEE S
34、td 802.1A should be considered as references to IEEE Std 802.* Formerly IEEE Std 802.1A.DATALINKLAYERPHYSICAL802.2 LOGICAL LINK802.1 BRIDGING802.1 MANAGEMENT802Ge2OVERVIEW Increment Abort error counter;If an uncorrectable Station Error, then request Join FSM to enter BypassTransmit End of DataTransm
35、it FCS and EFS(TS=STXN)Transmit Normal: TA(TS=STXD)Transmit Frame Data: TBMaximum Frame length exceeds SPV(MAX_TX) Increment Abort error counterFigure 9.2-2Station Transmit FSM OverviewIEEEPART 5: TOKEN RING ACCESS METHOD AND PHY LAYER SPECIFICATIONSAMENDMENT 5 Std 802.5v-2001Copyright 2001 IEEE. Al
36、l rights reserved. 99.2.1.3 Station Monitor FSM OverviewThe Station Monitor FSM, shown in Figure 9.2-3, supports the Heart Beat and Hard Error Recovery func-tions. Table 9.2-3 specifies the Monitor FSM.Figure 9.2-3Station Monitor FSM OverviewHeart Beat FailureDisable Heart Beat Process,Transmit Beac
37、on MAC Frame,Start Internal Test Timer,Start LMT TimerInsert Request GrantedInternal Test Timer ExpiredRemove the Station from the lobe, start internaltestingBeacon MAC frame received from SUADisable Heart Beat Process,Start Internal Test Timer,Start LMT TimerBeacon MAC Framereceived from SUAStart I
38、nternal Test Timer,Start LMT TimerInternal Test Timer ExpiredRemove the Station from thelobe, start internal testing(MS=SOPT)Operational: MA(MS=STBN)Transmit Beacon: MB(MS=SWFD)Wire Fault Delay: MD(MS=SIT)Station Internal Test: MCIEEEStd 802.5v-2001 LOCAL AND METROPOLITAN AREA NETWORKS10 Copyright 2
39、001 IEEE. All rights reserved.9.2.2 SpecificationAbbreviations and NotationsThe following abbreviations and notations are used in the Station Operational Tables.PMAC Policy Flag NotationsFPASO = Flag, C-Port abort sequence optionFPMRO = Flag, C-Port media rate optionPMAC Protocol Flag NotationsFPTX_
40、LTH = Flag, C-Port transmit lengthFPMR = Flag, C-Port media rateSMAC Policy Flag NotationsFSASO = Flag, Station abort sequence optionFSECO = Flag, Station error counting optionFSHMRTUO = Flag, Station High Media Rate Trade-up optionFSLMTO = Flag, Station LMT optionFSMRO = Flag, Station medium rate o
41、ptionFSOPO = Flag, Station open optionFSRDO = Flag, Station registration denied optionFSREGO = Flag, Station registration optionFSRRO = Flag, Station reject remove optionSMAC Station Policy Variables NotationsSPV(AP_MASK) = Access Protocol Mask Station Policy VariableSPV(IAC) = Individual address co
42、unt Station PolicVariableSPV(MAX_TX) = Maximum octets transmit countStation Policy VariableSPV(PD) = Phantom Drive Station Policy VariableSMAC C-Port Interface Flag NotationsFIPTKPS = Flag, Interface C-Port TKP StationEmulationFIPTXIS = Flag, Interface C-Port TXI Station EmulationSMAC Station Counte
43、rsCSBTX = Counter, Station byte transmittedCSREQ = Counter, Station registration requestCSTFQ = Counter, Station TXI frames queuedCSLTF = Counter, Station lobe test framesCSRAT = Counter, Station remove alert transmitSMAC Error Counter NotationsCSABE = Counter, Station abort errorCSBE = Counter, Sta
44、tion burst errorCSFE = Counter, Station frequency errorCSIE = Counter, Station internal errorCSLE = Counter, Station line errorCSRCE = Counter, Station receive congestion errorSMAC Protocol Flag NotationsFSBNT = Flag, Station beacon testFSBPF = Flag, Station bypass forceFSER = Flag, Station error re
45、portFSHBA = Flag, Station heart beat activeFSHMRTUA = Flag, Station high media rate trade-upactiveFSIRD = Flag, Station insert request delayFSJC = Flag, Station join process completeFSLMTF = Flag, Station lobe media test failureFSLMTS = Flag, Station lobe media test successFSMR = Flag, Station media
46、 rateFSRLMT = Flag, Station request lobe media testFSLTA = Flag, Station lobe test activeFSLTFE = Flag, Station lobe test frame errorFSOP = Flag, Station operationalFSPDC = Flag, Station phantom drive controlFSPDA = Flag, Station phantom drive activeFSRC = Flag, Station registration completeFSRRC =
47、Flag, Station return to recovered clock FSSL = Flag, Station signal lossFSSLD = Flag, Station signal loss detectedFSSLMT = Flag, Station start lobe media testFSTAS = Flag, Station Transmit Abort Sequence FSTI = Flag, Station transmit idlesFSTXC = Flag, Station transmit from crystalFSWF = Flag, Stati
48、on wire faultFSWFA = Flag, Station wire fault activeFTI = Flag, Transmit Idles (from Clause 4)SMAC Stored Value NotationSUA = stored upstream addressIEEEPART 5: TOKEN RING ACCESS METHOD AND PHY LAYER SPECIFICATIONSAMENDMENT 5 Std 802.5v-2001Copyright 2001 IEEE. All rights reserved. 119.2.3 State Mac
49、hine ElementsThe state machines use the Error Counters defined in 10.6 as well as the following counters, flags, and statesto describe the operation of the Station. These are logical elements used solely to describe the operation anddo not specify an implementation. The value of the flags and counters are only meaningful to the StationOperation Tables. Conformance to this standard is based only on externally observable behavior.9.2.3.1 SMAC CountersUnless otherwise specified, all counters are set to 0 by the Set_initial_conditions action.A counter may b
