LAB1 - 2.1
section 2 layer 3 technology
2.1 OSPF in AS 12345 Refer to “Diagram 2:Main Topology”
Configure OSPFv2 area 0 in ACME Headquarters （ AS12345 ） according to the following requirements:
●Configure the OSPF process ID to 12345 and set the router-id to interface Lo0 on all seven routers.
● The interface Lo0 at each router must be seen as an internal ospf prefix by all other routers.
● Ensure that OSPF is not running on any interface that is facing another AS .Use any method to accomplish this requirement.
● SW1 and SW2must no participate in routing at all.
● R1 must see the following OSPF routes in its routing table :
根据要求创建一个ospf 进程号为12345，路由id用loopback 0口来做
每台路由的loopback 0可以通过内部ospf的方式看到（宣告lo0口）
确保OSPF时不要把连接其他AS的接口宣告进ospf
SW1，SW2 不参与OSPF
在R1 SHOW OSPF的时候应该能看到下图效果
注意：
在每台路由器进行设置前请先确保直连路由通常，检查方法，ping直连接口
实验开始
第一部：确认直连路由状态
R1(config)#do ping 123.10.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.10.1.1, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms
R1(config)#do ping 123.10.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.10.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
R1(config)#do ping 123.10.1.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.10.1.6, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/4/5 ms
R1(config)#do ping 123.10.1.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.10.1.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/5 ms
ok，线路正常，如果出现ping不通的情况，检查端口是否没有被启用，或ip地址是否配置正确
第二步，配置ospf
R1#show ip inter brief
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES TFTP administratively down down
Ethernet0/1 123.10.1.5 YES TFTP up up
Ethernet0/2 123.10.1.2 YES TFTP up up
Ethernet0/3 unassigned YES TFTP administratively down down
Ethernet1/0 unassigned YES TFTP administratively down down
Ethernet1/1 unassigned YES TFTP administratively down down
Ethernet1/2 unassigned YES TFTP administratively down down
Ethernet1/3 unassigned YES TFTP administratively down down
Ethernet2/0 unassigned YES TFTP administratively down down
Ethernet2/1 unassigned YES TFTP administratively down down
Ethernet2/2 unassigned YES TFTP administratively down down
Ethernet2/3 unassigned YES TFTP administratively down down
Ethernet3/0 unassigned YES TFTP administratively down down
Ethernet3/1 unassigned YES TFTP administratively down down
Ethernet3/2 unassigned YES TFTP administratively down down
Ethernet3/3 unassigned YES TFTP administratively down down
Loopback0 123.1.1.1 YES TFTP up up
R1(config)#router ospf 12345
R1(config-router)#router-id 123.1.1.1
R1(config-router)#network 123.1.1.1 0.0.0.0 area 0
R1(config-router)#network 123.10.1.2 0.0.0.0 area 0
R1(config-router)#network 123.10.1.5 0.0.0.0 area 0
R1(config-router)#end
其他路由器也参考以上设置，先查看端口配置情况以及lo0的配置，然后创建ospf并进行宣告
第三步，检查
R1#show ip route ospf
Codes: L - local, 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, 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, H - NHRP, l - LISP
a - application route
- - replicated route, % - next hop override
Gateway of last resort is not set
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123.0.0.0/8 is variably subnetted, 17 subnets, 2 masks
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O 123.2.2.2/32 [110/21] via 123.10.1.1, 00:09:53, Ethernet0/2
O 123.3.3.3/32 [110/21] via 123.10.1.6, 00:00:52, Ethernet0/1
O 123.4.4.4/32 [110/11] via 123.10.1.1, 00:10:22, Ethernet0/2
O 123.5.5.5/32 [110/11] via 123.10.1.6, 00:00:36, Ethernet0/1
O 123.6.6.6/32 [110/21] via 123.10.1.1, 00:07:30, Ethernet0/2
O 123.7.7.7/32 [110/21] via 123.10.1.6, 00:00:52, Ethernet0/1
O 123.10.1.8/30 [110/30] via 123.10.1.6, 00:00:52, Ethernet0/1
[110/30] via 123.10.1.1, 00:09:53, Ethernet0/2
O 123.10.1.12/30 [110/20] via 123.10.1.6, 00:00:52, Ethernet0/1
O 123.10.1.16/30 [110/20] via 123.10.1.1, 00:10:03, Ethernet0/2
O 123.10.1.20/30 [110/20] via 123.10.1.1, 00:09:53, Ethernet0/2
O 123.10.1.24/30 [110/30] via 123.10.1.6, 00:00:52, Ethernet0/1
[110/30] via 123.10.1.1, 00:07:08, Ethernet0/2
O 123.10.1.28/30 [110/20] via 123.10.1.6, 00:00:52, Ethernet0/1