OSPF 选路问题求大神解答
模拟路由器AR11上连线路断开，AR9访问AR11（ip1.1.3.1）无法AR9--AR10--AR12--AR11而是AR9--AR13--AR14--AR10--AR12--AR11
我在AR9和AR10的G0/0/2线上建了个子接口区域为1，实现AR9和AR10的G0/0/2为同区域实现路由可以选择AR9--AR10--AR12--AR11来访问
可以还是无法AR9--AR10--AR12--AR11，只是AR9--AR10后面都是丢包,设备路由表都有学到就是无法访问，哪位大神看的懂，可以帮帮我。
配置
AR9:
interface GigabitEthernet0/0/0
ip address 1.1.1.1 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 2.2.1.1 255.255.255.252
#
interface GigabitEthernet0/0/2
ip address 3.3.3.1 255.255.255.252
#
interface GigabitEthernet0/0/2.1
dot1q termination vid 2
ip address 4.4.4.1 255.255.255.252
#
interface NULL0
#
ospf 110
area 0.0.0.0
network 3.3.3.0 0.0.0.255
area 0.0.0.1
network 1.1.1.0 0.0.0.255
network 2.2.1.0 0.0.0.255
network 4.4.4.0 0.0.0.255
stub
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
AR10:
interface GigabitEthernet0/0/0
ip address 1.1.2.1 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 2.2.2.1 255.255.255.252
#
interface GigabitEthernet0/0/2
ip address 3.3.3.2 255.255.255.252
#
interface GigabitEthernet0/0/2.1
dot1q termination vid 2
ip address 4.4.4.2 255.255.255.252
#
interface NULL0
#
ospf 110
area 0.0.0.0
network 3.3.3.0 0.0.0.255
area 0.0.0.1
network 1.1.2.0 0.0.0.255
network 2.2.2.0 0.0.0.255
network 4.4.4.0 0.0.0.255
stub
#
AR11:
interface GigabitEthernet0/0/0
ip address 1.1.1.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 1.1.3.1 255.255.255.252
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 110
area 0.0.0.1
network 1.1.1.0 0.0.0.255
network 1.1.3.0 0.0.0.255
stub
#
AR12
interface GigabitEthernet0/0/0
ip address 1.1.2.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 1.1.3.2 255.255.255.252
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 110
area 0.0.0.1
network 1.1.2.0 0.0.0.255
network 1.1.3.0 0.0.0.255
stub
AR13
interface GigabitEthernet0/0/0
ip address 2.2.1.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 2.2.3.1 255.255.255.252
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 110
area 0.0.0.1
network 2.2.1.0 0.0.0.255
network 2.2.3.0 0.0.0.255
stub
AR14
interface GigabitEthernet0/0/0
ip address 2.2.2.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 2.2.3.2 255.255.255.252
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 110
area 0.0.0.1
network 2.2.2.0 0.0.0.255
network 2.2.3.0 0.0.0.255
stub
没开子接口的情况下 AR9访问AR11下一跳不是AR10而是AR13的原因是：一类LSA优于三类LSA，AR9上会学习到一条区域1 AR13传过来的关于AR11的1类LSA和一条骨干区域 AR10传过来的关于AR11的三类LSA。
开了子接口的情况下丢包是因为子接口没开启arp广播，在子接口下执行命令:arp broadcast enable即可。
望采纳{:6_290:}
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