BGP用这几种报文实现的功能过程有哪些
BGP\u7684\u4e3b\u8981\u529f\u80fd\u662f\u4ec0\u4e48\uff1f\u5b83\u7684\u62a5\u6587\u6709\u51e0\u79cd\uff1fBGP\u7528\u8fd9\u51e0\u79cd\u62a5\u6587\u5b9e\u73b0\u7684\u529f\u80fd\u8fc7\u7a0b\u6709\u54ea\u4e9b\uff1fBGP\u53eb\u8fb9\u754c\u7f51\u5173\u534f\u8bae\uff0c\u662f\u7528\u4e8eAS\u95f4\u7684\u4e00\u79cd\u8def\u7531\u534f\u8bae\u3002
ospf\u3001rip\u3001isis\u7b49\uff0c\u5747\u662f\u7528\u6765\u53d1\u73b0\u8def\u7531\u7684\u3002
\u800cBGP\u7684\u529f\u80fd\u4e3b\u8981\u662f\u7528\u6765\u7ba1\u7406\u8def\u7531\uff0c\u800c\u975e\u53d1\u73b0\u8def\u7531\uff0c\u7528\u4e8eisp\u4e4b\u95f4\u3002
\u62a5\u6587\u67094\u79cd\uff1aopen\uff0ckeepalive\uff0cupdate\uff0cnotification\u3002\u7528\u6b644\u4e2d\u62a5\u6587\uff0c\u67096\u79cd\u72b6\u6001\u673a\u3002
open\u7528\u6765\u5efa\u7acbbgp\u90bb\u5c45\u5173\u7cfb\uff0ckeepalive\u7528\u6765\u4fdd\u6301\u8fd9\u79cd\u8fde\u63a5\uff0cupdate\u7528\u6765\u53d1\u9001\u66f4\u65b0\u6216\u64a4\u9500\u7684\u8def\u7531\u6761\u76ee\uff0cnotification\u7528\u6765\u901a\u544a\u7f51\u7edc\u9519\u8bef\u3002
\u4e00\u4e2a\u5178\u578b\u7684\u8fc7\u7a0b\u4e3a\uff1aIdle(\u542f\u52a8\u6d88\u606f)->Connect(TCP\u8fde\u63a5\u6210\u529f\uff0c\u53d1OPEN)->OpenSent(\u6536\u5230OPEN\u6d88\u606f\uff0c\u534f\u5546\u6210\u529f)->OpenConfirm(\u6536\u5230KEEPALIVE\u6d88\u606f)->Established(TCP\u8fde\u63a5\u5173\u95ed\uff0c\u6709\u9519\u8bef\uff0c\u6216\u5904\u7406UPDATE\u6d88\u606f\u5931\u8d25\uff0c\u6216\u6536\u5230NOTIFICATION\u6d88\u606f)->Idle
open\uff1a\u5efa\u7acb\u90bb\u5c45keepalive \u4fdd\u6301\u90bb\u5c45\u5173\u7cfbupdata\uff1a\u66f4\u65b0\u6570\u636enotification: \u6ca1\u8bb0\u9519\u7684\u8bdd\u662f\u89e3\u9664\u90bb\u5c45\u5173\u7cfb\u8fdb\u5165idle\u72b6\u6001
Open ---includes holdtime and BGP router ID，当然还有AS号。Keepalive ---每隔60S发送一次。hold time=180S
Update ---information for one path only (could be to multiple networks)
---Includes path attributes and networks
Notification
---when error is detected
---BGP connection is closed after sent
绛旓細Keepalive ---姣忛殧60S鍙戦佷竴娆°俬old time=180S Update ---information for one path only (could be to multiple networks)---Includes path attributes and networks Notification ---when error is detected ---BGP connection is closed after sent ...
绛旓細鑰孊GP鐨勫姛鑳戒富瑕佹槸鐢ㄦ潵绠＄悊璺敱锛岃岄潪鍙戠幇璺敱锛岀敤浜巌sp涔嬮棿銆鎶ユ枃鏈4绉嶏細open锛宬eepalive锛寀pdate锛宯otification銆傜敤姝4涓姤鏂囷紝鏈6绉嶇姸鎬佹満銆俹pen鐢ㄦ潵寤虹珛bgp閭诲眳鍏崇郴锛宬eepalive鐢ㄦ潵淇濇寔杩欑杩炴帴锛寀pdate鐢ㄦ潵鍙戦佹洿鏂版垨鎾ら攢鐨勮矾鐢辨潯鐩紝notification鐢ㄦ潵閫氬憡缃戠粶閿欒銆備竴涓吀鍨嬬殑杩囩▼涓猴細Idle(鍚姩娑堟伅)->Conne...
绛旓細BGP甯歌鍥涚鎶ユ枃锛歄PEN鎶ユ枃銆並EEPLIVE鎶ユ枃銆乁PDATE鎶ユ枃鍜孨OTIFICATION鎶ユ枃銆锛1锛塐PEN鎶ユ枃锛氬缓绔嬮偦灞呭叧绯汇锛2锛塊EEPLIVE鎶ユ枃锛氫繚鎸佹椿鍔ㄧ姸鎬侊紝鍛ㄦ湡鎬х‘璁ら偦灞呭叧绯伙紝瀵筄PEN鎶ユ枃鍥炲簲銆傦紙3锛塙PDATE鎶ユ枃锛氬彂閫佹柊鐨勮矾鐢变俊鎭傦紙4锛塏OTIFICATION鎶ユ枃锛氭姤鍛婃娴嬪埌鐨勯敊璇
绛旓細(1) 鎵撳紑(Open)鎶ユ枃锛岀敤鏉ヤ笌鐩搁偦鐨勫彟涓涓狟GP鍙戣█浜哄缓绔嬪叧绯銆(2) 鏇存柊(Update)鎶ユ枃锛岀敤鏉ュ彂閫佹煇涓璺敱鐨勪俊鎭紝浠ュ強鍒楀嚭瑕佹挙娑堢殑澶氭潯璺敱銆(3) 淇濇椿(Keepalive)鎶ユ枃锛岀敤鏉ョ‘璁ゆ墦寮鎶ユ枃鍜屽懆鏈熸у湴璇佸疄閭荤珯鍏崇郴銆(4) 閫氱煡(Notificaton)鎶ユ枃锛岀敤鏉ュ彂閫佹娴嬪埌鐨勫樊閿欍
绛旓細BGP鎶ユ枃绫诲瀷涓板瘜澶氭牱锛鍖呮嫭寮鏀撅紙OPEN锛夈佹洿鏂帮紙UPDATE锛夈侀氱煡锛圢OTIFICATION锛夈佷繚鎸佹椿璺冿紙KEEPALIVE锛夊拰璺敱鍒锋柊锛圧OUTE-REFRESH锛锛屾瘡涓姤鏂囬兘鎵胯浇鐫鐗瑰畾鐨勫姛鑳藉拰淇℃伅銆1. BGP杩炴帴寤虹珛 閫氳繃TCP鐨179绔彛锛屽绛変綋淇濇寔寮鏀捐繛鎺ワ紝鍙戦乲eepalive鎶ユ枃鏉ョ‘璁ゅ郊姝ょ殑瀛樺湪锛屽苟閫愭浜ゆ崲璺敱鏁版嵁銆2. BGP瀵圭瓑浣撹瘑鍒 IBG...
绛旓細BGP鐨勫洓绉嶆姤鏂锛歰pen锛宬eepalive锛寀pdate锛宯otification銆傚叾涓璒PEN鏄疶CP杩炴帴寤虹珛鍚庡彂閫佺殑绗竴涓秷鎭紝鐢ㄦ潵寤虹珛BGP瀵圭瓑浣撲箣闂寸殑杩炴帴鍏崇郴骞惰繘琛屽弬鏁板崗鍟嗐侭GP浼氶氳繃鐩镐簰鍙戦並eepalive鐨勬暟鎹潵缁存寔閭诲眳鍏崇郴锛岄粯璁ゆ瘡60绉掑彂閫佷竴娆★紝淇濇寔鏃堕棿涓180绉掞紝鍗冲埌杈180绉掓病鏈夋敹鍒伴偦灞呯殑Keepalive锛屼究璁や负閭诲眳涓㈠け锛屽垯鏂紑涓...
绛旓細鎬讳綋杩欎釜鎶ユ枃搴旇娌鏈変粈涔闂锛屽杩嘜SPF鐨勫hello鎶ユ枃浣滅敤寰堟竻妤氬惂锛岃繖涓猳pen璺焗ello鍩烘湰宸笉澶氾紝浣嗘槸hello鎶ユ枃鐨绗簩涓壒鎬у氨瀹屽叏涓嶄竴鏍蜂簡锛宧ello鎶ユ枃绗簩涓壒鎬ф槸淇濇椿锛岃BGP浣跨敤鎺ヤ笅鏉ヤ粙缁嶇殑keepalive鎶ユ枃杩涜BGP peer涔嬮棿鐨勪繚娲讳綔鐢紝褰撶劧杩欎篃绐佸嚭浜咮GP鐨勫閲忔洿鏂颁綔鐢ㄣ2銆乲eepalive鎶ユ枃 杩欎釜鎶ユ枃娌′粈涔...
绛旓細鑻ユ鏌ユ棤璇垯鍙戦並eepalive娑堟伅鎶ユ枃锛孠eepalive璁℃椂鍣ㄥ紑濮嬭鏃讹紝骞惰浆涓篛pen confirm鐘舵併 OPEN璇佸疄锛圤pen confirm锛夛細BGP绛夊緟Keepalive鎶ユ枃锛屽悓鏃跺浣嶄繚鎸佽鏃跺櫒銆傚鏋滄敹鍒颁簡Keepalive鎶ユ枃锛屽氨杞负Established鐘舵侊紝閭诲眳鍏崇郴鍗忓晢瀹屾垚銆傚鏋滅郴缁熸敹鍒颁竴鏉℃洿鏂版垨Keepalive娑堟伅锛屽畠灏嗛噸鏂板惎鍔ㄤ繚鎸佽鏃跺櫒锛涘鏋滄敹鍒...
绛旓細銆愮瓟妗堛戯細C 鍩虹姒傚康锛BGP寤虹珛閭诲眳鍏崇郴鏄氳繃open鎶ユ枃鍜宬eepalive鎶ユ枃瀹炵幇銆
绛旓細UPDATE鎶ユ枃鏄BGP鍗忚鐨勬牳蹇冿紝BGP鍙戣█浜哄彲浠ヤ娇鐢║PDATE鎶ユ枃鎾ら攢瀹冧互鍓嶉氱煡杩囩殑璺敱锛屼篃鍙互瀹ｅ竷澧炲姞鏂扮殑璺敱锛 鎾ら攢璺敱鍙互涓娆℃ф挙閿璁稿鏉★紝浣嗘槸鏂板璺敱锛屾瘡涓猆PDATE鎶ユ枃鍙兘娣诲姞涓鏉° BGP鍙互寰堝鏄撳湴瑙ｅ喅璺濈鍚戦噺璺敱閫夋嫨绠楁硶涓殑鈥滃潖娑堟伅浼犳挱寰楁參鈥滆繖涓闂銆傚綋鏌愪釜璺敱鍣ㄦ垨鑰呴摼璺嚭鐜版晠闅滅殑鏃跺欙紝鐢变簬...
