配置OSPF虚链路实验出现问题，请大侠们指教

原想虚链路命令挺简单，没想到弄了半天，就是成功不了啊。设备全是cisoco 3600

拓扑图如下：

R0：interface Loopback0
 ip address 1.0.0.1 255.255.255.0
!
interface Serial0/0
 ip address 192.168.1.2 255.255.255.0
 no fair-queue
 serial restart-delay 0
 clock rate 64000
!
interface Serial0/1
 ip address 192.168.3.1 255.255.255.0
 serial restart-delay 0
 clock rate 64000

router ospf 10
 router-id 1.0.0.1
 log-adjacency-changes
 area 2 virtual-link 3.3.3.3
 network 192.168.1.0 0.0.0.255 area 0
 network 192.168.3.0 0.0.0.255 area 1

 

R1：

interface Loopback0
 ip address 1.1.1.1 255.255.255.0
 ip ospf network point-to-point
!
interface Serial0/0
 ip address 192.168.2.2 255.255.255.0
 no fair-queue
 serial restart-delay 0
 clock rate 64000

router ospf 10
 log-adjacency-changes
 network 192.168.2.0 0.0.0.255 area 0

 

R2：

interface Loopback0
 ip address 2.2.2.2 255.255.255.0
!
interface Serial0/0
 ip address 192.168.1.1 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 192.168.2.1 255.255.255.0
 serial restart-delay 0

router ospf 10
 log-adjacency-changes
 network 192.168.1.0 0.0.0.255 area 0
 network 192.168.2.0 0.0.0.255 area 0

 

R3:

interface Loopback0
 ip address 3.3.3.3 255.255.255.0
!
interface Serial0/0
 ip address 192.168.3.2 255.255.255.0
 no fair-queue
 serial restart-delay 0
!
interface Serial0/1
 ip address 192.168.4.1 255.255.255.0
 serial restart-delay 0

router ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 area 2 virtual-link 1.0.0.1
 network 3.3.3.0 0.0.0.255 area 2
 network 192.168.3.0 0.0.0.255 area 1
 network 192.168.4.0 0.0.0.255 area 2

 

在配置虚链路之前，各网段是正常的，都能通，邻居建立，路由信息都没问题。刚开始以为是没有在dce上设时钟频率的原因，设置后，仍有问题。

请高手们指教，配置上哪有问题！