draft-prs-optical-routing-01.ps routing information exchange in optical networks 1 internetnew

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1、draft-prs-optical-routing-01.psInternetDraftDimitrisPendarakisExpirationDate:May,24,2001BalaRajagopalanDebanjanSahaTelliumInc.RoutingInformationExchangeinOpticalNetworksdraft-prs-optical-routing-01.ps1StatusofthisMemoThisdocumentisanInternet-Draftandisinfullconformancewithallprovision

2、sofSection10ofRFC2026.Internet-DraftsareworkingdocumentsoftheInternetEngineeringTaskForce(IETF),itsareas,anditsworkinggroups.NotethatothergroupsmayalsodistributeworkingdocumentsasInternet-Drafts.Internet-Draftsaredraftdocumentsvalidforamaximumofsixmonthsandmaybeupdated,replaced,orobso

3、letedbyotherdocumentsatanytime.ItisinappropriatetouseInternet-Draftsasreferencematerialortocitethemotherthanas``workinprogress.''ThelistofcurrentInternet-Draftscanbeaccessedathttp://www.ietf.org/ietf/1id-abstracts.txtThelistofInternet-DraftShadowDirectoriescanbeaccessedathttp://www.ie

4、tf.org/shadow.html.2AbstractTheobjectiveofthisdraftistodescribemechanismsforexchangingroutinginformationbetweenIPclientsandopticalnetworks,andbetweenopticalsub-networks.Suchinformationexchangewouldallowautomatedestablishmentofend-to-endpathsinanopticalnetworkcomprisingofmultiplesub-ne

5、tworks.Furthermore,itwouldallowopticalnetworkclients,specificallyIProuters,todiscovertheirremotepeersdynamically.Determinationofreachabilitycouldbethefirststepindynamicprovisioningofopticalpathsusingsignaling.RoutingInformationExchangeinOpticalNetworks1draft-prs-optical-routing-01.ps3

6、IntroductionConsidertheopticalnetworkingmodelasshowninFigure1.Here,clients(e.g.,IProuters)areattachedtoanopticalcorenetwork,andconnectedtotheirpeersoverdynamicallyestablishedswitchedopticalpaths.Theinteractionbetweentheclientsandtheopticalcoreisoverawell-definedsignalingandroutinginte

7、rface,shownastheUser-NetworkInterface(UNI).TheopticalnetworkshowninFigure1consistsofmultipleOpticalCross-Connects(OXCs)interconnectedbyopticallinksinageneraltopologyreferedtoasan“opticalmeshnetwork”.Thisnetworkmaybemulti-vendor,whereindividualvendorOXCsconstitutesub-networks.Eachsub-n

8、etwor