目 录__eol__第 1 章 BGP 路由协议 ······················································································ 1__eol__1.1 BGP 路径属性 ······················································································· 1__eol__1.1.1 Origin 属性··················································································· 1__eol__? 原理 ························································································ 1__eol__? 任务拓扑 ·················································································· 1__eol__? 实施步骤 ·················································································· 1__eol__? 任务验证 ·················································································· 4__eol__? 问题与思考 ··············································································· 5__eol__1.1.2 AS-Path 属性 ················································································ 5__eol__? 原理 ························································································ 5__eol__? 任务拓扑 ·················································································· 5__eol__? 实施步骤 ·················································································· 5__eol__? 任务验证 ·················································································· 7__eol__? 问题与思考 ··············································································· 8__eol__1.1.3 Next-Hop 属性 ·············································································· 8__eol__? 原理 ························································································ 8__eol__? 任务拓扑 ·················································································· 9__eol__? 实施步骤 ·················································································· 9__eol__? 任务验证 ················································································ 11__eol__? 问题与思考 ············································································· 13__eol__1.1.4 Local Preference 属性···································································· 13__eol__? 原理 ······················································································ 13__eol__? 任务拓扑 ················································································ 14__eol__? 实施步骤 ················································································ 14__eol__? 任务验证 ················································································ 16__eol__? 问题与思考 ············································································· 17__eol__1.1.5 MED 属性·················································································· 17__eol__? 原理 ······················································································ 17__eol__? 任务拓扑 ················································································ 17__eol__? 实施步骤 ················································································ 17__eol__? 任务验证 ················································································ 19__eol__? 问题与思考 ············································································· 21__eol__1.1.6 Community 属性 ···································································21__eol__? 原理 ······················································································ 21__eol__? 任务拓扑 ················································································ 22__eol__? 实施步骤 ················································································ 22__eol__? 任务验证 ················································································ 24__eol__? 问题与思考 ············································································· 26__eol__1.2 BGP 选路原则 ····················································································· 26__eol__1.2.1 选路原则 1—优选 Weight 值大····················································· 26__eol__? 原理 ··············