IEEE 802 1D-2004 en Local and Metropolitan Area Networks - Media Access Control (MAC) Bridges (IEEE Computer Society)《局域网和城域网 媒体存取控制(MAC)桥接器》.pdf
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1、IEEE Std 802.1D- 2004(Revision of IEEE Std 802.1D-1998)IEEE Standards802.1DTMIEEE Standard forLocal and metropolitan area networks Media Access Control (MAC) Bridges3 Park Avenue, New York, NY 10016-5997, USAIEEE Computer SocietySponsored by theLAN/MAN Standards CommitteeIEEE Standards9 June 2004Pri
2、nt: SH95213PDF: SS95213(Revision of IEEE Std 802.1D-1998) Recognized as an American National Standard (ANSI) IEEE Std 802.1DTM-2004(R2011)IEEE Standard for Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges Sponsor LAN MAN Standards Committee of the IEEE Computer Society Approv
3、ed 4 June 2004 Reaffirmed 4 April 2012 American National Standard Institute Approved 9 February 2004 Reaffirmed 31 March 2011 IEEE-SA Standards Board Abstract: An architecture for the interconnection of IEEE 802 Local Area Networks (LANs) below the MAC Service boundary is defined. MAC Bridges, as sp
4、ecified by this standard, allowcommunications between end stations attached to separate LANs, each with its own separateMAC, to be transparent to logical link control (LLC) and network layer protocols, just as if thestations were attached to the same LAN. Keywords: active topology, filtering, GARP,
5、GMRP, LANs, local area networks, MAC Bridges,MAC Service, MANs, metropolitan area networks, multicast registration, transparent bridging,quality of service, RSTP, spanning tree The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA IEEE is a registere
6、d trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Copyright 2004 IEEE. All rights reserved.iiiIntroductionThe MAC Bridge standardization activities tha
7、t resulted in the development of IEEE Std 802.1D-1990(subsequently republished as IEEE Std 802.1D, 1993 Edition ISO/IEC 10038:1993 and IEEE Std 802.1D,1998 Edition ISO/IEC 15802-3: 1998) specified an architecture and protocol for the interconnection ofIEEE 802 LANs below the MAC Service boundary.The
8、 2004 revision of this standard incorporates two amendments into the 1998 Edition:a) IEEE Std 802.1t-2001, technical and editorial corrections to the 1998 Edition; andb) IEEE Std 802.1w-2001, Rapid Reconfiguration, which specified the Rapid Spanning Tree Algorithmand Protocol (RSTP). In addition, th
9、is revision includes further technical and editorial corrections, and removes the originalSpanning Tree Protocol (STP) as a conformance option.Relationship between IEEE Std 802.1D and IEEE Std 802.1QAnother IEEE standard, IEEE Std 802.1Q-2003, extends the concepts of MAC Bridging and filteringservic
10、es to support the definition and management of Virtual LANs (VLANs).The capabilities defined in IEEE Std 802.1Q-2003 include the definition of a VLAN frame format that isable to carry VLAN identification and user priority information over LAN technologies, such as CSMA/CD,that have no inherent capab
11、ility to signal priority information. This information is carried in an additionalheader field, known as the Tag Header, which is inserted immediately following the Destination MACAddress, and Source MAC Address (and Routing Information field, if present) of the original frame. IEEEStd 802.1Q-2003 e
12、xtends the priority handling aspects of this standard to make use of the ability of theVLAN frame format to carry user priority information end to end across any set of concatenated underlyingMACs.The VLAN Bridging specification contained in IEEE Std 802.1Q-2003 is independent of this standard, inth
13、e sense that IEEE Std 802.1Q-2003 contains its own statement of the conformance requirements forVLAN Bridges. However, IEEE Std 802.1Q-2003 makes use of many of the elements of the specificationcontained in this standard, in particulara) The Bridge architecture b) The Internal Sublayer Service, and
14、the specification of its provision by IEEE 802 LAN MACsc) The major features of the operation of the forwarding processd) The Rapid Spanning Tree Protocole) The Generic Attribute Registration Protocol (GARP)f) The GARP Multicast Registration Protocol (GMRP)Since the original Spanning Tree Protocol (
15、STP) has been removed from the 2004 revision of IEEE Std802.1D, an implementation of RSTP is required for any claim of conformance for an implementation ofIEEE Std 802.1Q-2003 that refers to the current revision of IEEE Std 802.1D unless that implementationincludes the Multiple Spanning Tree Protoco
16、l (MSTP) specified in IEEE Std 802.1Q-2003. MSTP is basedon RSTP, extended to provide support for multiple spanning trees.This introduction is not part of IEEE Std 802.1D-2004, IEEE Standard for Local andMetropolitan Area Networks: Media Access Control (MAC) Bridges.ivCopyright 2004 IEEE. All rights
17、 reserved.Notice to usersErrataErrata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL forerrata periodically.InterpretationsCurrent interpretations can be accessed
18、at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.PatentsAttention is called to the possibility that implementation of this standard may require use of subject mattercovered by patent rights. By publication of this standard, no position is taken with respect to the existe
19、nce orvalidity of any patent rights in connection therewith. The IEEE shall not be responsible for identifyingpatents or patent applications for which a license may be required to implement an IEEE standard or forconducting inquiries into the legal validity or scope of those patents that are brought
20、 to its attention.ParticipantsAt the time this standard was completed, the 802.1D working group had the following membership:Tony Jeffree,Chair and EditorPaul Congdon,Vice-ChairMick Seaman,Interworking Task Group Chair and EditorLes BellPaul BottorffJim BurnsMarco CarugiDirceu CavendishArjan de Heer
21、Anush ElangovanHesham ElbakouryDavid Elie-Dit-CosaqueNorm FinnDavid FratturaGerard GoubertStephen HaddockAtsushi IwataNeil JarvisManu KayceeHal KeenBill LaneRoger LapuhLoren LarsenYannick Le GoffMarcus LeechMahalingam ManiDinesh MohanBob MoskowitzDon O ConnorDon PannellGlenn ParsonsKen PattonAllyn R
22、omanowDan RomascanuJessy V. RouyerAli SajassiDolors SalaMuneyoshi SuzukiJonathan ThatcherMichel ThorsenDennis VolpanoKarl WeberLudwig WinkelMichael D. WrightCopyright 2004 IEEE. All rights reserved.vThe following members of the balloting committee voted on this standard. Balloters may have voted for
23、approval, disapproval, or abstention. When the IEEE-SA Standards Board approved this standard on 9 February 2004, it had the followingmembership:Don Wright,Chair*Member EmeritusAlso included are the following nonvoting IEEE-SA Standards Board liaisons:Satish K. Aggarwal, NRC RepresentativeRichard De
24、Blasio, DOE RepresentativeAlan Cookson, NIST RepresentativeMichelle D. TurnerIEEE Standards Project EditorButch AntonEdward CarleyClint ChaplinSunghyun ChoiKeith ChowChristopher CookeWael DiabThomas DineenSourav DuttaClint EarlyWill FouldsDavid FratturaAnoop GhanwaniRobert M. GrowStephen HaddockJuli
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