OSPF外部路由引入
实验目的：
除了内部通信外，企业还需要与外部网络进行通信，不同企业网络之间存在互访需求。
假设A公司网络部署OSPF协议实现内部通信，因业务发展，需要访问B公司的一台WEB服务器。
网络拓扑图：
公司A：
R1
<Huawei>sy
[R1]sysname R1
[R1]in g0/0/1
[R1-GigabitEthernet0/0/1]ip add 10.0.12.1 24
[R1-GigabitEthernet0/0/1]in g0/0/2
[R1-GigabitEthernet0/0/2]ip add 10.0.13.1 24
[R1-GigabitEthernet0/0/2]in g0/0/0
[R1-GigabitEthernet0/0/0]ip add 10.0.15.1 24
[R1-GigabitEthernet0/0/2]q
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 10.0.12.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 10.0.13.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]q
[R1-ospf-1]q
[R1]dis ospf lsdb
OSPF Process 1 with Router ID 1.1.1.1
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 1.1.1.1 1.1.1.1 8 48 80000002 1
[R1]R2
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R2
[R2]in g0/0/0
[R2-GigabitEthernet0/0/0]ip add 10.0.12.2 24
[R2-GigabitEthernet0/0/0]in g0/0/1
[R2-GigabitEthernet0/0/1]ip add 10.0.23.2 24
[R2-GigabitEthernet0/0/2]ip add 10.0.24.2 24
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 10.0.12.2 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 10.0.23.2 0.0.0.0
[R2-ospf-1-area-0.0.0.0]q
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]network 10.0.24.2 0.0.0.0
[R2-ospf-1]q
[R2]dis ospf lsdb
OSPF Process 1 with Router ID 2.2.2.2
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 2.2.2.2 2.2.2.2 43 48 80000009 1
Router 1.1.1.1 1.1.1.1 282 48 8000000A 1
Router 3.3.3.3 3.3.3.3 277 48 80000006 1
Network 10.0.23.2 2.2.2.2 270 32 80000002 0
Network 10.0.13.1 1.1.1.1 282 32 80000002 0
Network 10.0.12.1 1.1.1.1 619 32 80000002 0
Sum-Net 10.0.24.0 2.2.2.2 14 28 80000001 1
Area: 0.0.0.1
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 2.2.2.2 2.2.2.2 14 36 80000001 1
Sum-Net 10.0.13.0 2.2.2.2 14 28 80000001 2
Sum-Net 10.0.12.0 2.2.2.2 14 28 80000001 1
Sum-Net 10.0.23.0 2.2.2.2 14 28 80000001 1
[R2]R3
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R3
[R3]in g0/0/0
[R3-GigabitEthernet0/0/0]ip add 10.0.13.3 24
[R3-GigabitEthernet0/0/0]in g0/0/1
[R3-GigabitEthernet0/0/1]ip add 10.0.23.3 24
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 10.0.13.3 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 10.0.23.3 0.0.0.0
[R3-ospf-1-area-0.0.0.0]q
[R3-ospf-1]q
[R3]dis ospf lsdb
OSPF Process 1 with Router ID 3.3.3.3
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 2.2.2.2 2.2.2.2 3 48 80000008 1
Router 1.1.1.1 1.1.1.1 12 48 8000000A 1
Router 3.3.3.3 3.3.3.3 7 48 80000006 1
Network 10.0.23.2 2.2.2.2 3 32 80000002 0
Network 10.0.13.1 1.1.1.1 12 32 80000002 0
Network 10.0.12.1 1.1.1.1 350 32 80000002 0
[R3]R4
<Huawei>sy
[Huawei]sy R4
[R4]in g0/0/0
[R4-GigabitEthernet0/0/0]ip add 10.0.24.4 24
[R4-GigabitEthernet0/0/0]in g0/0/1
[R4-GigabitEthernet0/0/1]ip add 172.16.0.1 24
[R4-GigabitEthernet0/0/1]q
[R4]ospf 1 router-id 4.4.4.4
[R4-ospf-1]area 1
[R4-ospf-1-area-0.0.0.1]network 172.16.0.1 0.0.0.0
[R4-ospf-1-area-0.0.0.1]network 10.0.24.4 0.0.0.0
[R4-ospf-1-area-0.0.0.1]q
[R4-ospf-1]q
[R4]dis ospf lsdb
OSPF Process 1 with Router ID 4.4.4.4
Link State Database
Area: 0.0.0.1
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 4.4.4.4 4.4.4.4 217 36 80000003 1
Router 2.2.2.2 2.2.2.2 217 36 80000005 1
Network 10.0.24.2 2.2.2.2 217 32 80000002 0
Sum-Net 10.0.13.0 2.2.2.2 398 28 80000001 2
Sum-Net 10.0.12.0 2.2.2.2 398 28 80000001 1
Sum-Net 10.0.23.0 2.2.2.2 398 28 80000001 1
[R4]PC2
测试连通性：
公司B
R5
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R5
[R5]in g0/0/0
[R5-GigabitEthernet0/0/0]ip add 10.0.15.5 24
[R5-GigabitEthernet0/0/0]in g0/0/1
[R5-GigabitEthernet0/0/1]ip add 10.0.56.5 24
[R5-GigabitEthernet0/0/1]q
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 10.0.56.5 0.0.0.0
[R5-ospf-1-area-0.0.0.0]q
[R5-ospf-1]q
[R5]dis ospf lsdb
OSPF Process 1 with Router ID 5.5.5.5
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 5.5.5.5 5.5.5.5 5 36 80000001 1
[R5]R6
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R6
[R6]in g0/0/0
[R6-GigabitEthernet0/0/0]ip add 10.0.56.6 24
[R6-GigabitEthernet0/0/0]in g0/0/01
[R6-GigabitEthernet0/0/1]ip add 192.168.1.1 24
[R6-GigabitEthernet0/0/1]q
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]netw
[R6-ospf-1-area-0.0.0.0]network 10.0.56.6 0.0.0.0
[R6-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.0
[R6-ospf-1-area-0.0.0.0]q
[R6-ospf-1]q
[R6]dis ospf lsdb
OSPF Process 1 with Router ID 6.6.6.6
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 6.6.6.6 6.6.6.6 6 48 80000004 1
Router 5.5.5.5 5.5.5.5 9 36 80000005 1
Network 10.0.56.5 5.5.5.5 9 32 80000002 0
[R6]PC1
测试连通性：
在R1 上引入外部路由：
[R1]ip route-static 192.168.1.0 255.255.255.0 10.0.15.5
[R1]ospf 1
[R1-ospf-1]import-route static
[R1]dis ospf lsdb
OSPF Process 1 with Router ID 1.1.1.1
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 2.2.2.2 2.2.2.2 616 48 8000000A 1
Router 1.1.1.1 1.1.1.1 172 48 8000000C 1
Router 3.3.3.3 3.3.3.3 849 48 80000007 1
Network 10.0.23.2 2.2.2.2 842 32 80000003 0
Network 10.0.13.1 1.1.1.1 852 32 80000003 0
Network 10.0.12.1 1.1.1.1 1189 32 80000003 0
Sum-Net 10.0.24.0 2.2.2.2 586 28 80000002 1
Sum-Net 172.16.0.0 2.2.2.2 461 28 80000001 2
AS External Database
Type LinkState ID AdvRouter Age Len Sequence Metric
External 192.168.1.0 1.1.1.1 8 36 80000001 1
[R1]在R5 上引入外部路由：
[R5]ip route-static 172.16.0.0 255.255.255.0 10.0.15.1
[R5]ospf 1
[R5-ospf-1]import-route static
[R5-ospf-1]q
[R5]dis ospf lsdb
OSPF Process 1 with Router ID 5.5.5.5
Link State Database
Area: 0.0.0.0
Type LinkState ID AdvRouter Age Len Sequence Metric
Router 6.6.6.6 6.6.6.6 1695 48 80000005 1
Router 5.5.5.5 5.5.5.5 6 36 80000006 1
Network 10.0.56.5 5.5.5.5 1733 32 80000002 0
AS External Database
Type LinkState ID AdvRouter Age Len Sequence Metric
External 172.16.0.0 5.5.5.5 测试连通性：
[R1]dis ospf lsdb ase
OSPF Process 1 with Router ID 1.1.1.1
Link State Database
Type : External //LSA类型
Ls id : 192.168.1.0 //目的网段地址
Adv rtr : 1.1.1.1 //产生此五类LSA ASBR的Router ID
Ls age : 604
Len : 36
Options : E
seq# : 80000001
chksum : 0x243e
Net mask : 255.255.255.0 //网络掩码
TOS 0 Metric: 1 //开销值
E type : 2
Forwarding Address : 0.0.0.0
Tag : 1
Priority : Low
[R1]
[R5]dis ospf lsdb ase 172.16.0.0
OSPF Process 1 with Router ID 5.5.5.5
Link State Database
Type : External
Ls id : 172.16.0.0
Adv rtr : 5.5.5.5
Ls age : 439
Len : 36
Options : E
seq# : 80000001
chksum : 0xe21d
Net mask : 255.255.255.0
TOS 0 Metric: 1
E type : 2
Forwarding Address : 0.0.0.0
Tag : 1
Priority : Low
[R5]
[R2]display ospf lsdb asbr self-originate
OSPF Process 1 with Router ID 2.2.2.2
Area: 0.0.0.0
Link State Database
Area: 0.0.0.1
Link State Database
Type : Sum-Asbr //LSA类型
Ls id : 1.1.1.1 //ASBR的Router ID
Adv rtr : 2.2.2.2 //产生此四类LSA ABR的Router ID
Ls age : 116
Len : 28
Options : E
seq# : 80000002
chksum : 0xfa53
Tos 0 metric: 1 //从RTB到达此ASBR的开销
[R2]测试 HTTP FTP：
