标题: bgp的问题 [打印本页] 作者: stl911 时间: 2003-03-04 14:37 标题: bgp的问题 我想知道为什么在实施bgp的过程中还需要使用ibgp。\r\n我觉得在一个as内部可以运行ospf rip等igp协议\r\n然后把这些igp协议用ebgp的方法通告给bgp就好了，这样bgp不也就知道我as内部的路由了吗作者: blue_sky 时间: 2003-03-04 15:12 标题: bgp的问题 看起来好象可行,不知试起来怎么样,只是你这样一个路由器就有一个以上的AS了,它既是IBGP,又是EBGP,可能对路由更新,聚合有点影响.作者: stl911 时间: 2003-03-04 15:31 标题: bgp的问题 楼上这位兄弟能不能再说清楚一点，对于“只是你这样一个路由器就有一个以上的AS了,它既是IBGP,又是EBGP,可能对路由更新,聚合有点影响.”这句作者: blue_sky 时间: 2003-03-04 15:52 标题: bgp的问题 自己看资料吧,搞清IBGP与EBGP的区别,及路由更新有什么不同.作者: yuhong 时间: 2003-03-04 16:01 标题: bgp的问题 iBGP describes the peering between BGP neighbors in the same autonomous system(AS). You\r\nuse iBGP in transit autonomous systems. Transit autonomous systems forward traffic from one\r\nAS to another AS. If you do not use iBGP in transit autonomous systems, the eBGP learned\r\nroutes are redistributed into an IGP and then redistributed into the BGP process in another\r\neBGP router. iBGP provides a better way to control the routes for the transit AS. With iBGP,\r\nthe external route information (attributes) are forwarded. iBGP is preferred over redistribution\r\nwith an IGP because the IGP does not understand AS paths and other BGP attributes.\r\nAnother use for iBGP is in large corporations where the IGP networks are too large to be supported\r\nby an IGP, such as Open Shortest Path First (OSPF). Three independent IGPs are in\r\nFigure 9-2: one for the Americas; one for Asia and Australia; and one for Europe, the Middle\r\nEast, and Africa. Routes are redistributed into an iBGP core.作者: bdsjjf169 时间: 2003-08-27 10:23
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