需求:
在R1和R4上面分别进行OSPF和ISIS的相互引入,ISIS引入到OSPF的路由类型为2,但是所有的网络路由全网可见;
R1和R4访问外部路由要走最优的路径;
OSPF area 34不能有ISIS区域的路由,R5到R2的loopback口要有等价的路由,同样R2到R5的loopback口也要有等价路由;
拓扑:
逻辑拓扑:
配置:
R1的配置:
route-policy i2o deny node 10 if-match tag 10 route-policy i2o permit node 20 apply cost 10000 apply tag 15 route-policy o2i permit node 20 apply cost 1000 apply tag 10 isis 1 import-route ospf 1 route-policy o2i ospf 1 import-route isis 1 type 2 route-policy i2o
R4的配置:
route-policy i2o deny node 10 if-match tag 10 route-policy i2o permit node 20 apply cost 1000 apply tag 15 route-policy o2i deny node 10 if-match tag 15 route-policy o2i permit node 20 apply cost 1000 apply tag 10 isis 1 import-route ospf 1 route-policy o2i ospf 1 import-route isis 1 type 2 route-policy i2o
针对于vlan10的路由,tag100进行优先级调整,在R1和R4上都配置
route-policy p10 per node 10 if-match tag 100 apply preference 12 ospf 1 preference ase route-policy p10
在R4上配置NSSA区域,不引入ISIS路由(此处配置可在上面的步骤完成)
ospf 1 area 34 nssa no-import-route