边界网关协议的研究与设计

边界网关协议的研究与设计
 
摘要：在ARPAnet初始建立的时候，它只有1个骨干网。随着互连网的出现，ARPAnet为了实现本地网的连接而设置了各种路由器，并在这些路由器上运行了1中网关-网关协议，专门用于本地网信息在各路由器之间的交换。这时，这些路由器都存储了另1个核心路由器的全部路由信息，是不需要缺省路由设置的。随着互连网规模的迅速增长，这种情况开始变化。再让1个路由器俩保存整个互连网的全部路由信息显然是不明智的。为解决这1问题，人们开始考虑让路由器只负责部分互连网的路由处理。则路由器必须访问相邻路由器或间接从其他自治系统中的路由器那获得这部分信息，这样外部路由器就产生了。运行在外部路由器上负责进行路由决策和报文转发的路由协议就称为外部网关路由协议。目前应用的外部网关路由协议主要是BGP-4协议。首先我来介绍1下BGP-4的实验环境-Zebra软件和Linux C。另外本文主要研究BGP-4协议的原理，深入学习BGP-4协议的配置，、路由结构。针对具体的环境做了1些实验。
关键字：边界网关协议；路径向量路由算法；自治系统；对等体；团体
 
Studying and Zmplement of Border Gateway Protocol  
Abstract： ARPAnet in the initial establishment of the time, it was only one backbone network. With the emergence of the Internet, in order to achieve local ARPAnet network connecting various routers and set up and running in the router, a gateway-gateway agreement, devoted to the local network of information exchange between the various routers. Then, these routers are stored another core router all routing information, is not set up default routing. With the rapid growth of Internet-scale, the situation began to change. Let a router keep all routing information of the Internet is obviously unwise. To solve this problem, people began to consider allowing router is responsible only for part of the Internet routing. The router was to visit neighbor router or to this part of the router that information indirectly from the other autonomous systems, so that external router produced. Running in external router, routing protocol responsibility for decision-making routing and the routing of messages transmitted was known as external gateway routing protocol. Today external gateway routing protocols mainly use BGP-4 protocol. Firstly,I,ll introduce the software ——Zebra for BGP-4 protocol environment and the opertion system——linux. Secondly, it majorly research principles of BGP-4 protocol and study configuration of BGP-4 protocol and routing structures. Aim at Specific the environment,I does some experiments.