DOCSIS3.0培训之CISCO-3-IPv6在有线网络的应用

IPv6在有线网络的应用,IPv6在有线网络的应用,IPv6概述有线运营商迁移的动力DOCSIS3.0的IPv6结构DOCSIS3.0CMIPv6工作流程CMTS和CM支持IPv6的需求网络配置,IPv6在有线网络的应用,IPv6概述有线运营商迁移的动力DOCSIS3.0的IPv6结构DOCSIS3.0CMIPv6工作流程CMTS和CM支持IPv6的需求网络配置,IPService,IPv4Solution,IPv6Solution,MobileIPwithDirectRouting,DHCP,MobileIP,IGMP/PIM/MulticastBGP,IPMulticast,MLD/PIM/MulticastBGP,ScopeIdentifier,Mobility,Autoconfiguration,自动配置,DHCP,32-bit,128-bit,AddressingRange,Quality-of-Service,DiffServ,IntServ,FlowLabels,DiffServ,IntServ,Security,IPSecMandated,worksEnd-to-End,IPSecOptional,-,IPAnycast,Supported,IPv4和IPv6的比较,IPv6Addressing,根据RFC2373定义架构地址类型:UnicastIdentifiesasingleinterfacePacketsenttoaunicastaddressisdeliveredtotheinterfaceidentifiedbythataddressAnycast:Identifiesasetofinterfaces(typicallyondifferentnodes)Packetsenttoananycastaddressisdeliveredtooneoftheinterfacesidentifiedbythataddress(normallythenearest)Multicast:Identifiesasetofinterfaces(typicallyondifferentnodes)Packetsenttoamulticastaddressisdeliveredtoallinterfacesidentifiedbythataddress没有广播broadcast地址。,地址分配,Theallocationprocesswasrecentlyupdatedbytheregistries:IANAallocatesfrom2001:/16toregionalregistriesEachregionalregistryallocationisa:/23ISPallocationsfromtheregionalregistryisa:/36(immediateallocation)or:/32(initialallocation)orshorterwithjustificationPolicyexpectationthatanISPallocatesa:/48prefixtoeachcustomer,2001,0410,ISPprefix,Siteprefix,Subnetprefix,/32,/48,/64,Registry,/23,InterfaceID,IPv6地址表示,128bitlength用8*16-bit来表示,用“:”分开连续多个16-bit全零段可以用“:”来表示压缩表示一个地址只能用一次32bits以下可以用IPv4规则表示“d.d.d.d“,Examples,IPv6Addresses:3ffe:910A:2356:5709:8475:1024:3911:20212005:0000:0000:0000:0090:7AEB:1000:123A1810:0000:0000:7AEF:0000:0000:1072:43101810:0000:0000:7AEF:0000:0000:6CompactedIPv6Address:2005:0:0:0:90:7AEB:1000:123ALegalcompaction2005:90:7AEB:1000:123ALegalcompaction1810:7AEF:0:0:1072:4310Legalcompaction1810:0:0:7AEF:1072:4310Legalcompaction1810:7AEF:1072:4310IllegalcompactionCompactionusedtwice!,IPv4内嵌IPv6路由功能Phase2CPE支持IPv6业务,IPv6FeaturesinDOCSIS3.0,CM可以作为“Lightweightrouter”Customerwillbeassigned/48prefixforsub-delegationwithinpremisesnetworkCM将通过IPv6运维和管理解决IPv4地址空间用户仍然可以使用IPv4(双堆栈)可以为CMs和CPEs配置managementprefix,为数据业务配置serviceprefix利用DHCPv6作为地址的分配和控制DHCPv4的options和sub-options在DHCPv6中重定义为vendor-specificoptions,CORE,ToInternet,HOME/SMB,HOME/SMB,CMTSrouter,HFC,CM2bridge,Managementprefix:2001:DB8:FFFF:0:/64Serviceprefix:2001:DB8:FFFE:0:/64Customer2prefix:2001:DB8:2:/48Customer3prefix:2001:DB8:3:/48,HFClink;assigned2001:DB8:FFFF:0:/64(mgmt)and2001:DB8:FFFE:0:/64(service),Customer2premiseslink;assigned2001:DB8:2:1:/64,Customer3premiseslink;assigned2001:DB8:3:1:/64,Accessmodel1,Accessmodel2,Accessmodel3,CPE1,CPE2,CPE3,CPErouter,CMrouter,MSOadmindomain,Customeradmindomain,RoutersspancustomerandMSOadministrativedomains,ServersDHCP,DNSTFTPTODManagement,DOCSIS3.xIPv6ReferenceArchitecture,CM1bridge,IPv6在有线网络的应用,IPv6概述有线运营商迁移的动力DOCSIS3.0的IPv6结构DOCSIS3.0CMIPv6工作流程CMTS和CM支持IPv6的需求网络配置,DOCSIS3.0的IPv6工作流程,CM可以以桥模式和路由模式工作CM可以以以下模式工作IPv4onlymodeIPv6onlymodeDualmodeCMTS通过L2message(MDD)通告CM采用何种模式工作如果CM没有受到MDD，就采用DOCSIS2.0模式工作,CM上线流程,Steps:Layer2provisioningAcquireIPv6connectivityObtaintimeofdayObtainconfigurationfileCompleteregistration,CM上线流程:Layer2,CMTS发送MDD给CM，确认CM的工作模式IPv4onlymodeIPv6onlymodeDualmodeAlternateProvisioningMode(APM):如果CMTS建议的模式失败，则轮流尝试三种模式,CM,CMTS,DetermineProvisioningmode,MDD,CM上线流程:IP地址请求,使用DHCPv6请求地址运营商需要知道IP地址的分配情况，并能最大限度的进行控制运营商使用DHCP可以降低运营中的异常情况发生DHCP服务器可以同时支持动态DNS(DynamicDNS),CM上线流程:IP地址请求,Routerdiscovery,Link-localaddressassignment,DHCPv6(basedonM/Obits),NoresponseexpectedtoDAD,NoresponseexpectedtoDAD,OptionalifRapidCommitnotused,MDD,CM上线流程:TOD,Routerdiscovery,Link-localaddressassignment,DHCPv6,NoresponseexpectedtoDAD,NoresponseexpectedtoDAD,OptionalifRapidCommitnotused,MDD,TOD,CM上线流程:获取配置文件,Routerdiscovery,Link-localaddressassignment,DHCPv6,NoresponseexpectedtoDAD,NoresponseexpectedtoDAD,OptionalifRapidCommitnotused,MDD,TFTP,TOD,CM上线流程:完成上线,Routerdiscovery,Link-localaddressassignment,DHCPv6,NoresponseexpectedtoDAD,NoresponseexpectedtoDAD,OptionalifRapidCommitnotused,MDD,TOD,TFTP,Register,双堆栈管理,CMdirectedtousedualstackmanagementviaMDDmessageAfterregisteringwitheitherIPv4orIPv6address,theCMacquirestheadditionalIPaddresstypeusingDHCP,IPv6在有线网络的应用,IPv6概述有线运营商迁移的动力DOCSIS3.0的IPv6结构DOCSIS3.0CMIPv6工作流程CMTS和CM支持IPv6的需求网络配置,对于CMTS的要求,CMTS可以作为桥或者路由器作为DHCPv6的转发中继（relayagent）在request插入options.接受response中的optionsNeighborDiscovery(ND)在host间转发ND可选择的实现NDproxyservice产生RAmessages组播:ASM,SSM,ForwardingIPv6controltraffic(ND,RAetc.)向后兼容老版本的DOCSISCM,对于CM的要求(bridge模式),支持DHCPv6支持APM和dualstack模式支持SNMPoverIPv4orIPv6ordualstack无论CM本身通过何种方式provision，需要支持CPE的IPv4或者IPv6数据转发,IPv6在有线网络的应用,IPv6概述有线运营商迁移的动力DOCSIS3.0的IPv6结构DOCSIS3.0CMIPv6工作流程CMTS和CM支持IPv6的需求网络配置,HOME/SMB,C2:PCWinVista(IPv4/6),STB(IPv6Multicast),C1:TV,HFC,IPv6网络配置,HFC,IPv6Internet,Servers(IPv4/6)CNRDHCP,DNS,DHCPv6PDTFTPTODHTTPStreamingVideo(IPv4/6Multicast),CMTS配置,ipv6unicast-routingipv6cefipv6multicast-routinginterfaceFastEthernet0/0ipv6address3001:3002:3003:3004:1/64Ipv6enableipv6ndra-interval5ipv6ripv6netenable,interfaceCable5/0ipaddressiphelperipv6address4001:0:1:3:2/64ipv6address4001:0:1:13:2/64ipv6enableipv6ndra-interval4ipv6ndmanaged-config-flagipv6ndother-config-flagipv6ripv6netenableipv6dhcprelaydestina