ANSI P802.1Q D5.0-2005 Draft Standard for Local and Metropolitan Area Networks— Virtual Bridged Local Area Networks — Revision《局域网和城域网用标准草案.虚拟桥接局域网.修订本》.pdf

1、Copyright 2005 by the Institute of Electrical and Electronics Engineers, Inc.345 East 47th StreetNew York, NY 10017, USAAll rights reserved.All rights reserved.This document is an unapproved draft of a proposed IEEE Standard. As such, this document is subject to change. USE AT YOUR OWN RISK! Because

2、 this is an unapproved draft, this document must not be utilized for any conformance/compliance purposes. Permission is hereby granted for IEEE Standards Committee participants to reproduce this document for purposes of IEEE standardization activities only. Prior to submitting this document to anoth

3、er standards development organization for standardization activities, permission must first be obtained from the Manager, Standards Licensing and Contracts, IEEE Standards Activities Department. Other entities seeking permission to reproduce this document, in whole or in part, must obtain permission

4、 from the Manager, Standards Licensing and Contracts, IEEE Standards Activities Department.IEEE Standards DepartmentCopyright and Permissions445 Hoes Lane, P.O. Box 1331Piscataway, NJ 08855-1331, USA123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354P8

5、02.1Q-REV/D5.0September 12, 2005IEEE P802.1Q-REV/D5.0Draft Standard forLocal and Metropolitan Area NetworksVirtual Bridged Local Area Networks RevisionSponsorLAN/MAN Standards Committeeof theIEEE Computer SocietyPrepared by the Interworking Task Group of IEEE 802.1Abstract: This standard specifies h

6、ow the MAC Service is supported by Virtual Bridged Local AreaNetworks, the principles of operation of those networks, and the operation of VLAN-aware Bridgesincluding management, protocols, and algorithms.Keywords: Bridged Local Area Networks, LANs, local area networks, MAC Bridges, metropolitanarea

7、 networks, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP),Virtual Bridged Local Area Networks, virtual LANsCopyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEENot for ResaleNo reproduction or networking permitted w

8、ithout license from IHS-,-,-P802.1Q-REV/D5.0 LOCAL AND METROPOLITAN AREA NETWORKSSeptember 12, 20052 Copyright 2005 IEEE. All rights reserved.This is an unapproved IEEE Standards Draft, subject to change.123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525

9、354Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright 2005 by the Institute of Electrical and Electronics Engineers, Inc.345 East 47th StreetNew York

10、, NY 10017, USAAll rights reserved.All rights reserved.This document is an unapproved draft of a proposed IEEE Standard. As such, this document is subject to change. USE AT YOUR OWN RISK! Because this is an unapproved draft, this document must not be utilized for any conformance/compliance purposes.

11、 Permission is hereby granted for IEEE Standards Committee participants to reproduce this document for purposes of IEEE standardization activities only. Prior to submitting this document to another standards development organization for standardization activities, permission must first be obtained f

12、rom the Manager, Standards Licensing and Contracts, IEEE Standards Activities Department. Other entities seeking permission to reproduce this document, in whole or in part, must obtain permission from the Manager, Standards Licensing and Contracts, IEEE Standards Activities Department.IEEE Standards

13、 DepartmentCopyright and Permissions445 Hoes Lane, P.O. Box 1331Piscataway, NJ 08855-1331, USA123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354P802.1Q-REV/D5.0September 12, 2005(Incorporates IEEE Std 802.1Q-1998, IEEE Std 802.1u-2001,IEEE Std 802.1v-

14、2001, and IEEE Std 802.1s-2002)IEEE P802.1Q-REV/D5.0Draft Standard forLocal and Metropolitan Area NetworksVirtual Bridged Local Area Networks RevisionSponsorLAN/MAN Standards Committeeof theIEEE Computer SocietyPrepared by the Interworking Task Group of IEEE 802.1Abstract: This standard specifies ho

15、w the MAC Service is supported by Virtual Bridged Local AreaNetworks, the principles of operation of those networks, and the operation of VLAN-aware Bridgesincluding management, protocols, and algorithms.Keywords: Bridged Local Area Networks, LANs, local area networks, MAC Bridges, metropolitanarea

16、networks, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP),Virtual Bridged Local Area Networks, virtual LANsCopyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEENot for ResaleNo reproduction or networking permitted wi

17、thout license from IHS-,-,-P802.1Q-REV/D5.0 LOCAL AND METROPOLITAN AREA NETWORKSSeptember 12, 20054 Copyright 2005 IEEE. All rights reserved.This is an unapproved IEEE Standards Draft, subject to change.1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253

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34、nto the legal validity orscope of those patents that are brought to its attention.Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Virtual Bridged Local Area

35、 Networks Revision P802.1Q-REV/D5.0September 12, 2005123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEENot for ResaleNo reproduction or networ

36、king permitted without license from IHS-,-,-Introduction to IEEE P802.1Q(This introduction is not part of P802.1Q, IEEE Standards for Local and metropolitan area networks Virtual BridgedLocal Area Networks.)The MAC Bridge standardization activities that resulted in the development of IEEE Std 802.1D

37、-1993 intro-duced the concept of Filtering Services in Bridged Local Area Networks, and mechanisms whereby filteringinformation in such LANs may be acquired and held in a Filtering Database.IEEE Std 802.1D, 1998 Edition, a revision of IEEE Std 802.1D-1993, extended this concept of Filtering Ser-vice

38、s in order to define additional capabilities aimed ata) The provision of expedited traffic capabilities, to support the transmission of time-critical informa-tion in a LAN environment;b) The use of signalled priority information as the basis for identifying expedited classes of traffic;c) The provis

39、ion of filtering services that support the dynamic definition and establishment of Groupsin a LAN environment, and the filtering of frames by Bridges such that frames addressed to a partic-ular Group are forwarded only on those LAN segments that are required in order to reach membersof that Group;d)

40、 The provision of a Generic Attribute Registration Protocol (GARP) that is used to support the mech-anism for providing Group filtering capability, and is also made available for use in other attributeregistration applications.This standard, first published as IEEE Std 802.1Q-1998, makes use of the

41、concepts and mechanisms of LANBridging that were introduced by IEEE Std 802.1D, and defines additional mechanisms that allow the imple-mentation of Virtual Bridged Local Area Networks. The following are described:e) Virtual LAN Services;f) The operation of the Forwarding Process that is required;g)

42、The structure of the Filtering Database that is required;h) The nature of the protocols and procedures that are required in order to provide Virtual LANservices, including the definition of the frame formats used to represent VLAN identification infor-mation, and the procedures used in order to inse

43、rt and remove VLAN identifiers and the headers inwhich they are carried;i) The ability to support end-to-end signalling of priority information regardless of the intrinsic abilityof the underlying MAC protocols to signal priority information;j) The GARP VLAN Registration Protocol (GVRP) that allows

44、distribution and registration of VLANmembership information (the protocol described makes use of the GARP protocol defined in ISO/IEC 15802-3);k) The management services and operations that are required in order to configure and administer net-works.Copyright 2005 IEEE. All rights reserved. 5This is

45、 an unapproved IEEE Standards Draft, subject to change.P802.1Q-REV/D5.0 LOCAL AND METROPOLITAN AREA NETWORKSSeptember 12, 2005123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354Copyright The Institute of Electrical and Electronics Engineers, Inc. Provi

46、ded by IHS under license with IEEENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The 2003 Edition of the standard incorporated three amendments, IEEE Std 802.1u-2001, IEEE Std 802.1v-2001, and IEEE Std 802.1s-2002, into the text of IEEE Std 802.1Q-1998. These amen

47、dments describeenhancements to the standard to allow:l) Dynamic Group and VLAN registration to be restricted, based on the contents of static filteringentries;m) VLAN classification according to link layer protocol type;n) Support for VLANs carried over multiple Spanning Tree instances.This revision

48、 of the standard is the result of balloting the 2003 Edition, along with maintenance changes toalign the text with improvements made to IEEE Std 802.1D.This standard contains state-of-the-art material. The area covered by this standard is undergoing evolution.Revisions are anticipated within the nex

49、t few years to clarify existing material, to correct possible errors, andto incorporate new related material. Information on the current revision state of this and other IEEE 802standards may be obtained fromSecretary, IEEE-SA Standards Board445 Hoes LaneP.O. Box 1331Piscataway, NJ 08855-1331USA6 Copyright 2005 IEEE. All rights reserved.This is an unapproved IEEE Standards Draft, subject to change.