邊界網關協議的研究與設計
邊界網關協議的研究與設計
摘要：在ARPAnet初始建立的時候，它只有一個骨干網。隨著互連網的出現，ARPAnet為了實現本地網的連接而設置了各種路由器，并在這些路由器上運行了一中網關-網關協議，專門用于本地網信息在各路由器之間的交換。這時，這些路由器都存儲了另一個核心路由器的全部路由信息，是不需要缺省路由設置的。隨著互連網規模的迅速增長，這種情況開始變化。再讓一個路由器倆保存整個互連網的全部路由信息顯然是不明智的。為解決這一問題，人們開始考慮讓路由器只負責部分互連網的路由處理。則路由器必須訪問相鄰路由器或間接從其他自治系統中的路由器那獲得這部分信息，這樣外部路由器就產生了。運行在外部路由器上負責進行路由決策和報文轉發的路由協議就稱為外部網關路由協議。目前應用的外部網關路由協議主要是BGP-4協議。首先我來介紹一下BGP-4的實驗環境-Zebra軟件和Linux C。另外本文主要研究BGP-4協議的原理，深入學習BGP-4協議的配置，、路由結構。針對具體的環境做了一些實驗。
關鍵字：邊界網關協議；路徑向量路由算法；自治系統；對等體；團體
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.
Keywords: BGP-4; Path Vector Routing algorithm; Autonomous System; Peer; Groups
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