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1、OSPF STUB 的配置和作用OSPF STUB 的配置和作用 实验TOP 实验目的：学习ospf stub的配置和作用。 一、 路由器初始配置： 1. R1上的初始配置 R1(config-line)#int s2/1 R1(config-if)#ip add 12.0.0.1 255.255.255.0 R1(config-if)#no sh R1(config-if)#int lo 0 R1(config-if)#ip add 1.1.1.1 255.255.255.0 R1(config-if)#router os 1 R1(config-router)#router-id 1.1.
2、1.1 R1(config-router)#net 1.1.1.1 0.0.0.0 a1 R1(config-router)#net 12.0.0.1 0.0.0.0 a 1 2. R2上的初始配置： R2(config-line)#int s2/1 R2(config-if)#ip add 12.0.0.2 255.255.255.0 R2(config-if)#no sh R2(config-if)#int s2/2 R2(config-if)#ip add 23.0.0.2 255.255.255.0 R2(config-if)#no sh R2(config-if)#int lo 0
3、R2(config-if)#ip add 2.2.2.2 255.255.255.0 R2(config-if)#router os 1 R2(config-router)#router-id 2.2.2.2 R2(config-router)#net 2.2.2.2 0.0.0.0 a 0 R2(config-router)#net 12.0.0.2 0.0.0.0 a 1 R2(config-router)#net 23.0.0.2 0.0.0.0 a 0 3. R3上的初始配置： R3(config-line)#int s2/1 R3(config-if)#ip add 23.0.0.3
4、 255.255.255.0 R3(config-if)#no sh R3(config-if)#int s2/2 R3(config-if)#ip add 34.0.0.3 255.255.255.0 R3(config-if)#no sh R3(config-if)#int lo 0 R3(config-if)#ip add 3.3.3.3 255.255.255.0 R3(config-if)#router os 1 R3(config-router)#router-id 3.3.3.3 R3(config-router)#net 3.3.3.3 0.0.0.0 a 0 R3(confi
5、g-router)#net 23.0.0.3 0.0.0.0 a 0 R3(config-router)#net 34.0.0.3 0.0.0.0 a 2 4. R4上的初始配置： R4(config-line)#int s2/1 R4(config-if)#ip add 34.0.0.4 255.255.255.0 R4(config-if)#no sh R4(config-if)#int lo 0 R4(config-if)#ip add 4.4.4.4 255.255.255.0 R4(config-if)#router os 1 R4(config-router)#router-id
6、4.4.4.4 R4(config-router)#net 4.4.4.4 0.0.0.0 a2 R4(config-router)#net 34.0.0.4 0.0.0.0 a 2 5. 查看OSPF的运行情况： R2(config-router)#do sh ip os ne Neighbor ID Pri State Dead Time Address Interface 3.3.3.3 0 FULL/ - 00:00:31 23.0.0.3 Serial2/2 1.1.1.1 0 FULL/ - 00:00:31 12.0.0.1 Serial2/1 /查看R2上路由表信息 R2(co
7、nfig-router)#do sh ip rout Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary,
8、L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is not set 34.0.0.0/24 is subnetted, 1 subnets O IA 34.0.0.0 110/128 via 23.0.0.3, 00:05:19, Serial2/2 1.0.0.0/32 is sub
9、netted, 1 subnets O 1.1.1.1 110/65 via 12.0.0.1, 00:06:02, Serial2/1 2.0.0.0/24 is subnetted, 1 subnets C 2.2.2.0 is directly connected, Loopback0 3.0.0.0/32 is subnetted, 1 subnets O 3.3.3.3 110/65 via 23.0.0.3, 00:05:19, Serial2/2 4.0.0.0/32 is subnetted, 1 subnets O IA 4.4.4.4 110/129 via 23.0.0.
10、3, 00:04:52, Serial2/2 23.0.0.0/24 is subnetted, 1 subnets C 23.0.0.0 is directly connected, Serial2/2 12.0.0.0/24 is subnetted, 1 subnets C 12.0.0.0 is directly connected, Serial2/1 /查看R1上的路由表信息 R1(config-router)#do sh ip rout Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP
11、, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user s
12、tatic route o - ODR, P - periodic downloaded static route Gateway of last resort is not set 34.0.0.0/24 is subnetted, 1 subnets O IA 34.0.0.0 110/192 via 12.0.0.2, 00:00:36, Serial2/1 1.0.0.0/24 is subnetted, 1 subnets C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets O I
13、A 2.2.2.2 110/65 via 12.0.0.2, 00:01:23, Serial2/1 3.0.0.0/32 is subnetted, 1 subnets O IA 3.3.3.3 110/129 via 12.0.0.2, 00:00:51, Serial2/1 4.0.0.0/32 is subnetted, 1 subnets O IA 4.4.4.4 110/193 via 12.0.0.2, 00:00:14, Serial2/1 23.0.0.0/24 is subnetted, 1 subnets O IA 23.0.0.0 110/128 via 12.0.0.
14、2, 00:01:23, Serial2/1 12.0.0.0/24 is subnetted, 1 subnets C 12.0.0.0 is directly connected, Serial2/1 二、 实验过程： 将区域1配置为STUB区域： R1(config-router)#area 1 stub/在R1上将区域1配置为STUB R2(config-router)#area 1 stub/在R2上将区域1配置为STUB 三、 实验调试： 1 重新查看R2上路由表信息 R2(config-router)#do sh ip rout Codes: C - connected, S -
15、 static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS in
16、ter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is not set 34.0.0.0/24 is subnetted, 1 subnets O IA 34.0.0.0 110/128 via 23.0.0.3, 00:02:54, Serial2/2 1.0.0.0/32 is subnetted, 1 subnets O 1.1.1.1 110/65 via 12.0.0.1, 00:
17、02:54, Serial2/1 2.0.0.0/24 is subnetted, 1 subnets C 2.2.2.0 is directly connected, Loopback0 3.0.0.0/32 is subnetted, 1 subnets O 3.3.3.3 110/65 via 23.0.0.3, 00:03:09, Serial2/2 4.0.0.0/32 is subnetted, 1 subnets O IA 4.4.4.4 110/129 via 23.0.0.3, 00:02:54, Serial2/2 23.0.0.0/24 is subnetted, 1 s
18、ubnets C 23.0.0.0 is directly connected, Serial2/2 12.0.0.0/24 is subnetted, 1 subnets C 12.0.0.0 is directly connected, Serial2/1 2 查看R1上的路由表变化： R1(config-router)#do sh ip rou Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter ar
19、ea N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static
20、 route Gateway of last resort is 12.0.0.2 to network 0.0.0.0 34.0.0.0/24 is subnetted, 1 subnets O IA 34.0.0.0 110/192 via 12.0.0.2, 00:04:08, Serial2/1 1.0.0.0/24 is subnetted, 1 subnets C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets O IA 2.2.2.2 110/65 via 12.0.0.2,
21、00:04:08, Serial2/1 3.0.0.0/32 is subnetted, 1 subnets O IA 3.3.3.3 110/129 via 12.0.0.2, 00:04:08, Serial2/1 4.0.0.0/32 is subnetted, 1 subnets O IA 4.4.4.4 110/193 via 12.0.0.2, 00:04:08, Serial2/1 23.0.0.0/24 is subnetted, 1 subnets O IA 23.0.0.0 110/128 via 12.0.0.2, 00:04:08, Serial2/1 12.0.0.0
22、/24 is subnetted, 1 subnets C 12.0.0.0 is directly connected, Serial2/1 O*IA 0.0.0.0/0 110/65 via 12.0.0.2, 00:04:09, Serial2/1 以上输出结果表明，R1增加了一条默认路由，指向R2的S2/1接口，如果在区域0或者1重发布其它路由信息，R1上也只会有这条默认路由。 3 验证，在R4上重发布直连路由，在R1上查看路由表 /在R4上重建两条直连路由，并重分布到OSPF路由内 R4(config-if)#int lo 1 R4(config-if)#ip add 192.168
23、.1.1 255.255.255.0 R4(config-if)#int lo 2 R4(config-if)#ip add 192.168.2.1 255.255.255.0 R4(config-if)#router os 1 R4(config-router)#redistribute connected subnets /在R1上继续查看路由表 R1(config-router)#do sh ip rout Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP extern
24、al, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR
25、, P - periodic downloaded static route Gateway of last resort is 12.0.0.2 to network 0.0.0.0 34.0.0.0/24 is subnetted, 1 subnets O IA 34.0.0.0 110/192 via 12.0.0.2, 00:11:55, Serial2/1 1.0.0.0/24 is subnetted, 1 subnets C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets O
26、IA 2.2.2.2 110/65 via 12.0.0.2, 00:11:55, Serial2/1 3.0.0.0/32 is subnetted, 1 subnets O IA 3.3.3.3 110/129 via 12.0.0.2, 00:11:55, Serial2/1 4.0.0.0/32 is subnetted, 1 subnets O IA 4.4.4.4 110/193 via 12.0.0.2, 00:11:55, Serial2/1 23.0.0.0/24 is subnetted, 1 subnets O IA 23.0.0.0 110/128 via 12.0.0.2, 00:11:55, Serial2/1 12.0.0.0/24 is subnetted, 1 subnets C 12.0.0.0 is directly connected, Serial2/1 O*IA 0.0.0.0/0 110/65 via 12.0.0.2, 00:11:55, Serial2/1 以上结果表明，STUB区域过滤外部路由信息，并自动添加一条默认路由用于路由到远程网络。
