CERNET2’s IPv4 over IPv6 Requirement (draft)

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Presentation transcript:

CERNET2’s IPv4 over IPv6 Requirement (draft) Xing Li <2005-10-07>

Outline CERNET2 Briefing CERNET2’s IPv4 over IPv6 requirement Configurations Summary

CERNET2 Briefing CERNET2 is the largest backbone of CNGI project CERNET2 is running on top of CERNET Transport network CERNET2 is a “pure IPv6” backbone The users of CERNET2 require high performance IPv4 applications

CNGI Backbones ChinaTelecom CERNET CNC/CST ChinaMobile Unicom XinJiang XiZang 兰州 NeiMengGu NingXia 西安 ShanXi HeBei 郑州武汉南京合肥上海 YunNan GuiZhou 长沙 JiangXi 厦门 GuangXi HaiNan 长春 JiLin 大连台湾深圳成都 QingHai 济南重庆 CERNET ChinaTelecom CNC/CST ChinaMobile Unicom 杭州福州沈阳青岛天津香港 HeiLongJiang LiaoNing 北京 ShanDong JiangSu ZheJiang FuJian GuangDong HuNan HuBei HeNan AnHui ShaanXi GanSu SiChuan ChinaRail 昆明广州

CERNET Transport Network 大连北京郑州石家庄武汉合肥南京上海长沙南昌杭州广州福州成都昆明重庆厦门海口桂林沈阳哈尔滨天津济南南宁深圳太原青岛 BJ zhz XA CD WH GZ xmn hzh SH NJ hef dln SY chc hrb chq chs tjn jnn lzh

CERNET2 IPv6 Technical Specification 25 Pops in 20 cities linked via 2.5Gbps to 10 Gbps trunks IPv6 only Backbone AS23910 2001:DA8::/32 IGP - OSPFv3 EGP - BGP4+ peering with 25 regional Pops 5 CNGI backbones CERNET IPv6, CJ-IPv6, NSFCNET, 863-testbed, 3Tnet, etc 100+ access networks

CERNET2 Topology

CERNET2 Peering

CERNET2’s IPv4 over IPv6 App. Requirement High Throughput Video Multicast Video

CERNET2’s Vision IPv4 over IPv6 may help Built and/or upgrade a backbone without worrying the limited IPv4 address, have a better performance-to-cost ratio and in a “politically correct” manner Support existing IPv4 access networks Support existing IPv4 applications And it may help for the transition from IPv4 to IPv6 in a cost effective, incremental and seamless fashion

Configuration (1) Only BJ, SH and GZ provide IPv4 service Other nodes are IPv6 only Allow manual configuration Must support unicast and multicast Global IPv4 Internet

Configuration (2) All Pops provide IPv4 service BJ GZ SH hzh xmn WH NJ hrf jnn SY dln chc hrb zhz XA CD chq lzh Prefer auto-configuration Must support unicast and multicast chs tjn Global IPv4 Internet

IPv4 static or eBGP peering Access Network’s View CERNET2 Backbone edge IPv4 Access IPv6 Access IPv4 static or eBGP peering Encapsulation and Setup Same as a dual-stack backbone Pure IPv6 LRW

Summary IPv4 over IPv6 service should support The IPv4 access network should behave as if it is connected to a IPv4 or dual-stack backbone It should support both IPv4 unicast and multicast Initial requirement is inside an AS domain, but if possible, cross AS’s mechanism is desirable Encapsulation and control protocol includes Encapsulation type End point setup MTU Management requires MIB