Configuring advanced BGP参考.ppt

Configuring advanced BGP Overview Peer Group 路由反射器 Filter-list Suppress-map Attribute-map Advertise-map BGP backdoor BGP团体 BGP联盟 Peer Group Example: Peer Group 路由反射器 Filter-list Suppress-map Attribute-map Advertise-map BGP backdoor BGP团体 BGP团体属性主要包含如下四种: no-export:该属性的路由不通告给AS以外的对等体 no-advertise:该属性的路由不通告给任何BGP的对等体 internet:该属性的路由会通告所有BGP对等体 local-as:该属性的路由仅仅会通告给本地AS的对等体 BGP Community : internet BGP Community : no-export BGP Community : no-advertise BGP Community : local-as LAB : BGP Community BGP联盟 END Implementing IPv6 Introducing IPv6 Why Do We Need a Larger Address Space? Internet population Approximately 973 million users in November 2005 Emerging population and geopolitical and address space Mobile users PDA, pen-tablet, notepad, and so on Approximately 20 million in 2004 Mobile phones Already 1 billion mobile phones delivered by the industry Transportation 1 billion automobiles forecast for 2008 Internet access in planes – Example: Lufthansa Consumer devices Sony mandated that all its products be IPv6-enabled by 2005 Billions of home and industrial appliances IPv6 Advanced Features Larger address space Global reachability and flexibility Aggregation Multihoming Autoconfiguration Plug-and-play End to end without NAT? Renumbering Simpler header Routing efficiency Performance and forwarding rate scalability No broadcasts No checksums Extension headers Flow labels IPv6 Advanced Features (Cont.) Mobility and security Mobile IP RFC-compliant IPsec mandatory(or native) for IPv6 Transition richness Dual stack 6to4 tunnels Translation Larger Address Space IPv4 32 bits or 4 bytes long 4,200,000,000 possible addressable nodes IPv6 128 bits or 16 bytes: four times the bits of IPv4 3.4 * 1038 possible addressable nodes 340,282,366,920,938,463,374,607,432,768,211,456 5 * 1028 addresses per person Larger Address Space EnablesAddress Aggregation Aggregation of prefixes announced in the global routing table Efficient and scalable routing Improved bandwidth