思科网络技术培训之13：ISDN

©1999,CiscoSystems,Inc.13-1Chapter13CompletinganISDNBRICall©1999,CiscoSystems,Inc.—13-2ObjectivesUponcompletionofthischapter,youwillbeabletoperformthefollowingtasks:•DescribethecomponentsthatmakeupISDNconnectivity•ConfigureISDNBRIandlegacydial-on-demandrouting(DDR)•VerifyDDRoperation©1999,CiscoSystems,Inc.—13-3WhatisISDN?ProvidernetworkDigitalPBXSmallofficeHomeofficeVoice,data,video,andspecialservicesTelecommuterCentralsiteDchannel:分路信令，veryfastBchannel：64K©1999,CiscoSystems,Inc.—13-4StandardsfromtheITU(formerlyCCITT)ISDNStandardsProtocolKeyExamplesTelephoneNetworkandISDNISDNConcepts,Aspects,andInterfacesSwitchingandSignalingI-SeriesQ.921—LAPD(LinkAccessProcedureontheDchannel)Q.931—ISDNNetworkLayerbetweenTerminalandSwitchQ-SeriesIssueE-SeriesE.163—InternationalTelephoneNumberingPlanE.164—InternationalISDNAddressingI.100Series—Concepts,Structures,TerminologyI.400—User-NetworkInterfaces(UNIs)©1999,CiscoSystems,Inc.—13-5BRIandPRIareusedgloballyforISDNChannelMostlyUsedforBCircuit-switcheddata(HDLC,PPP)Capacity64kbpsD2BServiceprovidernetworkNT1ISDNAccessOptionsSignalinginformation(LAPD)D16/64kbpsCSU/DSU23or30BBRIPRID©1999,CiscoSystems,Inc.—13-631BRICallProcessingISDNserviceprovider4Bchannel(s)Dchannel/SS7signaling2SS7ISDNSwitchISDNSwitch©1999,CiscoSystems,Inc.—13-7ISDNFunctionsandReferencePoints•Functionsaredevicesorhardware•ReferencepointsaredemarcationsorinterfacesNT1TATE2TE1NT2LocalloopExistingTerminalISDNTerminalTerminalAdapterRSTUServiceprovidernetwork©1999,CiscoSystems,Inc.—13-8CiscoISDNBRIInterfacesTAS/TRServiceprovidernetworkNativeISDNinterface—intbri0NonnativeISDNinterface—intserial0(EIA/TIA-232,V.35,X.21)NT1NT1S0S/Tbri0Ubri0TE1NT1TE1TE2©1999,CiscoSystems,Inc.—13-9ManyprovidersandswitchtypesServicesvarybyregionsandcountriesISDNSwitchTypesCOCOSSSSSSSSSSSSS©1999,CiscoSystems,Inc.—13-10Router(config)#isdnswitch-typeswitch-typeConfiguringISDNBRI•SpecifiesthetypeofISDNswitchwithwhichtheroutercommunicates•OtherconfigurationrequirementsvaryforspecificprovidersStep1:SpecifytheISDNswitchtypeRouter(config-if)#isdnswitch-typeswitch-type©1999,CiscoSystems,Inc.—13-11•SetsaBchannelSPIDrequiredbymanyserviceprovidersConfiguringISDNBRI(cont.)Step2:(Optional)SettingSPIDs•SetsaSPIDforthesecondBchannelRouter(config-if)#isdnspid1spid-number[ldn]Router(config-if)#isdnspid2spid-number[ldn]SomeserviceprovidersrequireSPIDstoauthenticatethatacallrequestsarewithincontractspecifications©1999,CiscoSystems,Inc.—13-12WrittenExerciseLocalLoopCustomerPremisesServiceProviderBRI0S0Labelthefunctionalelementsandreferencepoints©1999,CiscoSystems,Inc.—13-13WrittenExercise:AnswersLocalLoopCustomerPremisesServiceProviderNT1BRI0S0NT1TAUUS/TS/TRLabelthefunctionalelementsandreferencepoints©1999,CiscoSystems,Inc.—13-14WhatIsDial-on-DemandRouting?PSTNISDNIneedtosenddatatoDallas.DallasCorporateChicago•Connectwhenneeded•Disconnectwhenfinished•ISDNorPSTN©1999,CiscoSystems,Inc.—13-15WhentoUseDDRHeadquartersTelecommuterVendor•Periodicconnections•Smallamountsofdata©1999,CiscoSystems,Inc.—13-16GenericDDROperation1.RoutetodestinationisdeterminedDCE“Interesting”packetarrives©1999,CiscoSystems,Inc.—13-17GenericDDROperation1.Routetodestinationisdetermined2.InterestingpacketsdictateDDRcallDCE“Interesting”packetarrives©1999,CiscoSystems,Inc.—13-18GenericDDROperation1.Routetodestinationisdetermined2.InterestingpacketsdictateDDRcall3.Dialerinformationislookedup“Interesting”packetarrivesDialconnectionISDNorBasicServiceDCE©1999,CiscoSystems,Inc.—13-191.Routetodestinationisdetermined2.InterestingpacketsdictateDDRcall3.Dialerinformationislookedup.nexthop?#?inuse?4.Trafficistransmitted5.CallisterminatedGenericDDROperation“Interesting”packetarrivesDialconnectionISDNorBasicServiceDCE©1999,CiscoSystems,Inc.—13-20ConfiguringLegacyDDR1Definestaticroutes—WhatroutedoIuse?“Interesting”packetarrivesDCE©1999,CiscoSystems,Inc.—13-21ConfiguringLegacyDDR12Definestaticroutes—WhatroutedoIuse?Specifyinterestingtraffic—Whattrafficenablesthelink?“Interesting”packetarrivesDCE©1999,CiscoSystems,Inc.—13-22312Definestaticroutes—WhatroutedoIuse?Specifyinterestingtraffic—Whattrafficenablesthelink?Configurethedialerinformation—WhatnumberdoIcall?ConfiguringLegacyDDR“Interesting”packetarrivesDialconnectionISDNorBasicServiceDCE©1999,CiscoSystems,Inc.—13-23Task1:DefiningStaticRoutes(RoutetoDestination)NetworkprefixandprefixmaskSpecifyaddressofnexthoprouteriproute10.40.0.0255.255.0.010.1.0.1iproute10.10.0.0255.255.0.010.1.0.2iproute10.20.0.0255.255.0.010.1.0.2CentralISDNHome10.1.0.1bri05551000bri0555200010.1.0.2Subnets10.10.0.010.20.0.0Subnet10.40.0.0©1999,CiscoSystems,Inc.—13-24Task2:SpecifyingInterestingTraffic(