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[路由交换RS] 思科学习笔记-BGP的笔记总结 分享一份超强的BGP协议总结 某培训机构内部教材 |
思科学习笔记-BGP的笔记总结
节选:1 BGP 基础部分 ................................ ................................ ................................ ................................ ................................ .......................... 3 1.1 BGP 的报文 ................................ ................................ ................................ ................................ ................................ ............... 3 1.2 BGP 建立邻居经历五个状态 ................................ ................................ ................................ ................................ .................. 3 1.2.1 出现 IDLE IDLE状态: ................................ ................................ ................................ ................................ ....................... 3 1.2.2 出现 ACtiveACtive ACtive状态原因: ................................ ................................ ................................ ................................ ........... 3 1.3 邻居建立的条件 ................................ ................................ ................................ ................................ ................................ ........ 3 1.4 BGP 的 TTLTTL ................................ ................................ ................................ ................................ ................................ ................ 4 1.5 BGP 的路由表 ................................ ................................ ................................ ................................ ................................ ........... 4 1.6 BGP 路由优化的条件 ................................ ................................ ................................ ................................ ............................... 4 1.7 BGP RIB BGP RIB BGP RIB-FailureFailureFailure Failure ................................ ................................ ................................ ................................ ................................ ...... 4 1.7.1 RIB 产生的原因: ................................ ................................ ................................ ................................ ........................... 4 1.7.2 RIB 的结果: ................................ ................................ ................................ ................................ ................................ ... 4 1.7.3 查看 BGP 的路由条目: ................................ ................................ ................................ ................................ ........... 4 2 BGP 的各种特殊情况 ................................ ................................ ................................ ................................ ................................ ............. 5 2.1 BGP 中自动汇总的情况环境: ................................ ................................ ................................ ................................ .............. 5 2.2 BGP 中解决路由黑洞: ................................ ................................ ................................ ................................ ........................... 5 2.3 peer group peer grouppeer grouppeer group peer grouppeer grouppeer group 作用 ................................ ................................ ................................ ................................ ................................ ...... 5 2.4 路由聚合(汇总) ................................ ................................ ................................ ................................ ................................ .... 6 2.4.1 手工创建: ................................ ................................ ................................ ................................ ................................ .. 6 2.4.2 创建静态路由并重分布进 BGP : ................................ ................................ ................................ ........................... 6 2.5 BGP 的默认路由产生 ................................ ................................ ................................ ................................ ............................... 7 2.5.1 对所有邻居发送默认 路由: ................................ ................................ ................................ ................................ ..... 7 2.5.2 只对特定的邻居发送默认路由: ................................ ................................ ................................ ............................ 7 2.6 BGP 的密码认证 ................................ ................................ ................................ ................................ ................................ ....... 7 2.7 BGP 的过滤 ................................ ................................ ................................ ................................ ................................ ............... 7 2.7.1 根据路由的 IP 来过滤之外 ................................ ................................ ................................ ................................ ....... 7 2.7.2 根据路由携带的 AS_Path AS_PathAS_PathAS_Path 来过滤: ................................ ................................ ................................ ....................... 8 2.8 BGP 条件路由 ................................ ................................ ................................ ................................ ................................ ........... 8 2.9 通过 AS 欺骗的形式来建立邻居 ................................ ................................ ................................ ................................ ............ 8 3 BGP 的反射器 ................................ ................................ ................................ ................................ ................................ .......................... 9 3.1 为什么需要配置 BGP 的反射器: 的反射器: ................................ ................................ ................................ ................................ ......... 9 3.2 BGP 的反射器机制: ................................ ................................ ................................ ................................ ........................... 9 3.3 BGP 的反射器特点: ................................ ................................ ................................ ................................ ......................... 10 3.4 BGP 的反射器命令配置: ................................ ................................ ................................ ................................ .................... 10 3.5 BGP 的反射器中修改 cluster IDcluster ID cluster IDcluster IDcluster ID cluster ID: ................................ ................................ ................................ ................................ ..... 10 4 BGP 联邦 ................................ ................................ ................................ ................................ ................................ ................................ 10 4.1 为什么需要配置联邦 ................................ ................................ ................................ ................................ .............................. 10 4.2 BGP 联邦的机制: ................................ ................................ ................................ ................................ ................................ . 10 4.3 BGP 联邦的特点: ................................ ................................ ................................ ................................ ................................ . 10 4.4 BGP 联邦的配置命令步骤: ................................ ................................ ................................ ................................ ................ 11 5 BGP 属性: ................................ ................................ ................................ ................................ ................................ ............................ 12 5.1 no -exportexport exportexport ................................ ................................ ................................ ................................ ................................ ............... 13 5.2 no -advertiseadvertise advertiseadvertiseadvertise advertise ................................ ................................ ................................ ................................ ................................ .......... 17 5.3 local locallocallocal-as ................................ ................................ ................................ ................................ ................................ .................... 18 5.4 私有 Community Community Community ................................ ................................ ................................ ................................ ................................ ... 19 6 BGP 选路原则 ................................ ................................ ................................ ................................ ................................ ........................ 22 6.1 WeigWeigWeig ht ................................ ................................ ................................ ................................ ................................ ..................... 22 6.2 local locallocallocal-preference preference ................................ ................................ ................................ ................................ ................................ ... 24 6.3 本地路由始发( Next Next -Hop Hop) ................................ ................................ ................................ ................................ .............. 25 6.4 AS -PatPatPath ................................ ................................ ................................ ................................ ................................ ................... 27 6.5 Origin Origin 属性 ................................ ................................ ................................ ................................ ................................ ............. 28 6.6 MED ................................ ................................ ................................ ................................ ................................ .......................... 30 6.7 eBGPeBGP 优于 iBGP iBGP ................................ ................................ ................................ ................................ ................................ ..... 32 6.8 下一跳的 MetricMetricMetric Metric ................................ ................................ ................................ ................................ ................................ ..... 34 6.9 负载均衡 ................................ ................................ ................................ ................................ ................................ ................... 36 6.10 下一跳都为 eBGPeBGP ,则选择最早学习到的路由 ,则选择最早学习到的路由 ................................ ................................ ................................ ................. 38 6.11 最低 RouterRouterRouter RouterRouter-ID 下一跳 ................................ ................................ ................................ ................................ ......................... 40 6.12 Cluster list list ................................ ................................ ................................ ................................ ................................ .............. 42 6.13 BGP 的 PeerPeerPeerPeer地址 ................................ ................................ ................................ ................................ ................................ ... 44
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