实验十OSPF路由聚合

1、全区域启动OSPF协议，a2为NSSA区域，R4写静态到R5,R5写缺省到R4
2、区域1的交换机配置四个虚拟接口分别为vlanif1,2,3,4,vlanif1配置ip连接R1,其他三个虚拟接口分别对应三台PC
3、在区域2的R3上进行路由聚合，不能再r2上，route-id大的优先

聚合前查看ospf数据库
		 AS External Database
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 External  20.0.5.1        10.0.3.3            58  36    80000002       1
 External  20.0.5.0        10.0.3.3            63  36    80000005       1
 External  20.0.5.3        10.0.3.3            61  36    80000007       1
     External  20.0.5.2        10.0.3.3            61  36    80000002       1
在R3上聚合后
		 AS External Database
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
     External  20.0.5.0        10.0.3.3           132  36    80000005       1

4、在R1上对区域1的路由进行聚合聚合前，查看数据库，多余的在文档删掉

<r1>dis ospf lsdb
	 OSPF Process 1 with Router ID 10.0.1.1
		 Link State Database 
		         Area: 0.0.0.0
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Sum-Net   20.0.3.0        10.0.1.1           592  28    80000001       2
 Sum-Net   20.0.2.0        10.0.1.1           592  28    80000001       2
Sum-Net   20.0.1.0        10.0.1.1           592  28    80000001       2
聚合后
<r2>dis ospf lsdb

	 OSPF Process 1 with Router ID 10.0.2.2
		 Link State Database 

		         Area: 0.0.0.0
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Sum-Net   20.0.0.0        10.0.1.1             8  28    80000001       2

原文链接：https://blog.csdn.net/qq_43440595/article/details/105369993