1.先配好个端口vlan及ip
2.配置各个交换机及的ospf![]A(https://s1.51cto.com/images/blog/201905/26/bbfc5de1874804880d74f377f2f1204b.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
C
3.配置BGP 引入OSPF和直连路由配置B 和C
4.在B C 上配置OSPF引入BGP路由
5.在B上配置路由聚合
6.验证display ip routering-table 
