8.6 ISIS手动产生默认路由

1.查看R1、R6默认路由（由Level-1-2产生缺省路由）

<R1>display ip routing-table protocol isis
  0.0.0.0/0   ISIS-L1 15   10          D   12.1.1.2        GigabitEthernet0/0/1
<R6>display ip routing-table protocol isis
 0.0.0.0/0   ISIS-L1 15   10          D   56.1.1.5        GigabitEthernet0/0/1

2.R2为L2区域产生一条默认路由，R3查看路由

[R2]isis 1
[R2-isis-1]default-route-advertise 
<R3>display ip routing-table
 0.0.0.0/0   ISIS-L2 15   10          D   23.1.1.2        GigabitEthernet0/0/0

3.AR1上产生默认路由通告给L1区域

[R2]interface GigabitEthernet 0/0/0
[R2-GigabitEthernet0/0/0]shutdown 
<R1>display ip routing-table protocol isis
   2.2.2.2/32  ISIS-L1 15   10          D   12.1.1.2        GigabitEthernet0/0/1
//shutdownR2之间R3链路，R1查看路由
[R2]route-policy dsrw permit node 10
[R2-route-policy]apply isis level-1
//改变R2为 level-1
[R2]isis 1
[R2-isis-1]default-route-advertise route-policy dsrw
<R1>display ip routing-table protocol isis
 0.0.0.0/0   ISIS-L1 15   10          D   12.1.1.2        GigabitEthernet0/0/1