http://www.china-ccie.com/ccie/lilun/igp/igp.html
对于没有配置虚链路的其他路由器R1。配置虚链路的两台路由器之间(R2-R3)的区域还是原区域(area1),并没有合并到area0
对于配置了虚链路的路由器(R2,R3)。,之前的区域拓展成了area0
配置虚链路前
R1
Gateway of last resort is not set
33.0.0.0/32 is subnetted, 1 subnets
O IA 33.3.3.3 [110/66] via 12.1.1.2, 00:07:30, FastEthernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O IA 23.1.1.0 [110/65] via 12.1.1.2, 00:07:39, FastEthernet0/0
22.0.0.0/32 is subnetted, 1 subnets
O 22.2.2.2 [110/2] via 12.1.1.2, 00:07:39, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected, FastEthernet1/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, Loopback11
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, FastEthernet0/0
R1#
R2
Gateway of last resort is not set
33.0.0.0/32 is subnetted, 1 subnets
O 33.3.3.3 [110/65] via 23.1.1.3, 00:07:42, Serial1/0.23
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial1/0.23
22.0.0.0/24 is subnetted, 1 subnets
C 22.2.2.0 is directly connected, Loopback22
10.0.0.0/24 is subnetted, 1 subnets
O 10.1.1.0 [110/2] via 12.1.1.1, 00:07:52, FastEthernet0/0
11.0.0.0/32 is subnetted, 1 subnets
O 11.1.1.1 [110/2] via 12.1.1.1, 00:07:52, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, FastEthernet0/0
R2#
R3
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
C 34.1.1.0 is directly connected, FastEthernet0/0
33.0.0.0/24 is subnetted, 1 subnets
C 33.3.3.0 is directly connected, Loopback33
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial1/0.23
22.0.0.0/32 is subnetted, 1 subnets
O IA 22.2.2.2 [110/65] via 23.1.1.2, 00:07:54, Serial1/0.23
10.0.0.0/24 is subnetted, 1 subnets
O IA 10.1.1.0 [110/66] via 23.1.1.2, 00:07:54, Serial1/0.23
11.0.0.0/32 is subnetted, 1 subnets
O IA 11.1.1.1 [110/66] via 23.1.1.2, 00:07:56, Serial1/0.23
12.0.0.0/24 is subnetted, 1 subnets
O IA 12.1.1.0 [110/65] via 23.1.1.2, 00:09:21, Serial1/0.23
44.0.0.0/32 is subnetted, 1 subnets
O 44.4.4.4 [110/2] via 34.1.1.4, 00:09:52, FastEthernet0/0
R3#
R4
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
C 34.1.1.0 is directly connected, FastEthernet0/0
44.0.0.0/24 is subnetted, 1 subnets
C 44.4.4.0 is directly connected, Loopback44
R4#
R4#
配置虚链路后
R1
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
O IA 34.1.1.0 [110/66] via 12.1.1.2, 00:00:14, FastEthernet0/0
33.0.0.0/32 is subnetted, 1 subnets
O IA 33.3.3.3 [110/66] via 12.1.1.2, 00:00:14, FastEthernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O IA 23.1.1.0 [110/65] via 12.1.1.2, 00:00:14, FastEthernet0/0
22.0.0.0/32 is subnetted, 1 subnets
O 22.2.2.2 [110/2] via 12.1.1.2, 00:00:14, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected, FastEthernet1/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, Loopback11
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, FastEthernet0/0
44.0.0.0/32 is subnetted, 1 subnets
O IA 44.4.4.4 [110/67] via 12.1.1.2, 00:00:16, FastEthernet0/0
R1#
R2
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
O IA 34.1.1.0 [110/65] via 23.1.1.3, 00:02:48, Serial1/0.23
33.0.0.0/32 is subnetted, 1 subnets
O 33.3.3.3 [110/65] via 23.1.1.3, 00:02:48, Serial1/0.23
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial1/0.23
22.0.0.0/24 is subnetted, 1 subnets
C 22.2.2.0 is directly connected, Loopback22
10.0.0.0/24 is subnetted, 1 subnets
O 10.1.1.0 [110/2] via 12.1.1.1, 00:02:48, FastEthernet0/0
11.0.0.0/32 is subnetted, 1 subnets
O 11.1.1.1 [110/2] via 12.1.1.1, 00:02:50, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, FastEthernet0/0
44.0.0.0/32 is subnetted, 1 subnets
O IA 44.4.4.4 [110/66] via 23.1.1.3, 00:02:51, Serial1/0.23
R2#
R3
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
C 34.1.1.0 is directly connected, FastEthernet0/0
33.0.0.0/24 is subnetted, 1 subnets
C 33.3.3.0 is directly connected, Loopback33
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial1/0.23
22.0.0.0/32 is subnetted, 1 subnets
O 22.2.2.2 [110/65] via 23.1.1.2, 00:04:10, Serial1/0.23
10.0.0.0/24 is subnetted, 1 subnets
O 10.1.1.0 [110/66] via 23.1.1.2, 00:04:11, Serial1/0.23
11.0.0.0/32 is subnetted, 1 subnets
O 11.1.1.1 [110/66] via 23.1.1.2, 00:04:12, Serial1/0.23
12.0.0.0/24 is subnetted, 1 subnets
O 12.1.1.0 [110/65] via 23.1.1.2, 00:04:15, Serial1/0.23
44.0.0.0/32 is subnetted, 1 subnets
O 44.4.4.4 [110/2] via 34.1.1.4, 00:08:45, FastEthernet0/0
R3#
R4
Gateway of last resort is not set
34.0.0.0/24 is subnetted, 1 subnets
C 34.1.1.0 is directly connected, FastEthernet0/0
33.0.0.0/32 is subnetted, 1 subnets
O IA 33.3.3.3 [110/2] via 34.1.1.3, 00:09:45, FastEthernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O IA 23.1.1.0 [110/65] via 34.1.1.3, 00:09:45, FastEthernet0/0
22.0.0.0/32 is subnetted, 1 subnets
O IA 22.2.2.2 [110/66] via 34.1.1.3, 00:05:16, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
O IA 10.1.1.0 [110/67] via 34.1.1.3, 00:05:18, FastEthernet0/0
11.0.0.0/32 is subnetted, 1 subnets
O IA 11.1.1.1 [110/67] via 34.1.1.3, 00:05:18, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O IA 12.1.1.0 [110/66] via 34.1.1.3, 00:05:19, FastEthernet0/0
44.0.0.0/24 is subnetted, 1 subnets
C 44.4.4.0 is directly connected, Loopback44
R4#