为什么BGP报文长度的最大值是4096 bgp协议的四种报文是什么？
BGP\u62a5\u6587\u7684\u62a5\u5934\u957f\u5ea6\u4e3a\u591a\u5c11\u4e2a\u5b57\u8282BGP\u662f\u5c01\u88c5\u5728TCP\u4e0a\uff0c\u6240\u4ee5\u62a5\u6587\u957f\u5ea6\u7531TCP\u7684\u6ed1\u52a8\u7a97\u53e3\u51b3\u5b9a\uff0cTCP\u7684\u7a97\u53e3\u7531\u63a5\u6536\u7a97\u53e3\u548c\u62e5\u585e\u7a97\u53e3\u5171\u540c\u51b3\u5b9a\uff0c\u67e5\u4e86\u8d44\u6599\uff0c\u521d\u59cb\u7684TCP\u7a97\u53e3\u4e3a4096\u3002TCP\u7a97\u53e3\u662f\u4f1a\u968f\u7740\u63a5\u6536\u8005\u7684\u63a5\u6536\u80fd\u529b\u548c\u7f51\u7edc\u62e5\u585e\u60c5\u51b5\u8fdb\u884c\u8c03\u8282\u7684\u3002\u53ef\u80fdBGP\u4e3a\u4e86\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\uff0c\u9650\u5b9a\u4e86\u4e00\u4e9b\u4e1c\u897f\u5427\uff08BGP\u62a5\u6587\u5934\u5185\u4e5f\u6709length\u5b57\u6bb5\uff0c\u867d\u7136\u670916bit\uff0c\u4f46\u662f\u9650\u5b9a\u572819~4096\u7684\u8303\u56f4\u5185\uff09\u3002
(1) \u6253\u5f00(Open)\u62a5\u6587\uff0c\u7528\u6765\u4e0e\u76f8\u90bb\u7684\u53e6\u4e00\u4e2aBGP\u53d1\u8a00\u4eba\u5efa\u7acb\u5173\u7cfb\u3002
(2) \u66f4\u65b0(Update)\u62a5\u6587\uff0c\u7528\u6765\u53d1\u9001\u67d0\u4e00\u8def\u7531\u7684\u4fe1\u606f\uff0c\u4ee5\u53ca\u5217\u51fa\u8981\u64a4\u6d88\u7684\u591a\u6761\u8def\u7531\u3002
(3) \u4fdd\u6d3b(Keepalive)\u62a5\u6587\uff0c\u7528\u6765\u786e\u8ba4\u6253\u5f00\u62a5\u6587\u548c\u5468\u671f\u6027\u5730\u8bc1\u5b9e\u90bb\u7ad9\u5173\u7cfb\u3002
(4) \u901a\u77e5(Notificaton)\u62a5\u6587\uff0c\u7528\u6765\u53d1\u9001\u68c0\u6d4b\u5230\u7684\u5dee\u9519\u3002
绛旓細濡傛灉閰嶇疆浜嗚仈鐩燂紝as-confederation-sequence鍜宎s-confederation-set涓ょ绫诲瀷鐨凙S-Path瀹炵幇闃茬幆锛BGP璺敱鍣ㄦ爣璇嗭紙RouterID锛夊湪BGP浼氳瘽寤虹珛鏃讹紝Open鎶ユ枃涓惡甯︼紱鐢ㄤ簬BGP缃戠粶涓敮涓鏍囪瘑涓鍙癇GP璁惧锛4瀛楄妭闀垮害锛孖Pv4鍦板潃褰㈠紡锛汢GP RouterID鍜孫SPF RouterID涓鏍凤紝鍙互鎵嬪伐鎸囧畾锛屼篃鍙互鑷姩閫夊彇锛涗紭閫塴oopback鍦板潃澶х殑...
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绛旓細BGP閫夎矾鍘熷垯锛堝喅绛栬繃绋嬶級1.浼橀夋湁鏈澶Weight鐨勮矾鐢憋紱2.浼橀夋湁鏈澶OCAL_PREF鍊肩殑璺敱锛3.浼橀変粠鏈矾鐢卞櫒濮嬪彂鐨勮矾鐢憋紱4.浼橀夋湁鏈鐭瑼S_PATH鐨勮矾鐢憋紱5.鏍规嵁Origin灞炴.浼橀夊叿鏈夋渶浣庤捣婧愮被鍨嬬殑璺敱锛圛GP>EG>Incomplete锛夛紱6.浼橀夋渶灏廙ED 鍊肩殑璺敱锛7.澶栭儴璺敱EBGP浼樺厛浜庤仈鐩熷閮ㄨ矾鐢变紭浜庡唴閮ㄨ矾鐢盜BGP锛...
