Multipoint bidirectional republication and routing strategy topology experiment

Catalog

One 、 The experiment purpose

Two 、 The experimental requirements

3、 ... and 、 The experimental steps

1. Change device name

2. RIP and OSPF Declare

3. Two way republication

4. Routing interference

​5. Routing strategy

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One 、 The experiment purpose

The topology environment shown in the figure below meets the experimental requirements through the use of multi-point bidirectional republishing and routing strategies

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Two 、 The experimental requirements

1. Use multipoint bidirectional republishing

2. All routers choose the best route

3. There is a backup path , No loop and route feedback

4.R1 Except for self loopback , Plus 4 Strip loop , And change the following parameters

172.16.1.0/24 deny

172.16.2.0/24 type 1

172.16.3.0/24 cost 6

172.16.4.0/24 type 1 cost 9

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3、 ... and 、 The experimental steps

1. Change device name

With R1 For example ：

[Huawei]sysname r1

[r1]

2. RIP and OSPF Declare

1）R1

[R1]rip 1
[R1-rip-1]version 2
[R1-rip-1]network 1.0.0.0
[R1-rip-1]network 12.0.0.0
[R1-rip-1]network 14.0.0.0
[R1-rip-1]network 172.16.0.0

2）R2

[R2]rip 1
[R2-rip-1]version 2
[R2-rip-1]network 12.0.0.0
[R2-rip-1]network 2.0.0.0
[R2]ospf 1 router-id 2.2.2.2 
[R2-ospf-1]area 0.0.0.0 
[R2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255 

3）R3

[R3]ospf 1
[R3-ospf-1]ospf 1 router-id 3.3.3.3 
[R3-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255 
[R3-ospf-1-area-0.0.0.0]network 3.3.3.0 0.0.0.255 
[R3-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255 

4）R4

[R4]rip 1
[R4-rip-1]version 2
[R4-rip-1]network 14.0.0.0
[R4]ospf 1 router-id 4.4.4.4 
[R4-ospf-1]area 0.0.0.0 
[R4-ospf-1-area-0.0.0.0]network 4.4.4.0 0.0.0.255 
[R4-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255 

3. Two way republication

stay R2 and R4 Two way republishing on , With R2 For example

[R2]rip 1
[R2-rip-1]import-route ospf 1
[R2]ospf 1
[R2-ospf-1]import-route rip 1

4. Routing interference

because ospf When the protocol passes the local loopback interface network segment , by 32 Bit host routing ; However, if the local loopback is imported into other routes through republication , Based on the direct route in the local route table ; If the local direct route is of other length , This will make the network appear two different ways of mask transmission in the whole network ;

Therefore, it is necessary to modify the network type of the loopback interface on each router

With R2 For example

[R2]interface LoopBack 0
[R2-LoopBack0]ospf network-type broadcast

5. Routing strategy

According to the experimental needs, it is necessary to R2 and R4 Use routing policy on

With R2 For example

[R2]ip ip-prefix a deny 172.16.1.0 24
[R2]ip ip-prefix b permit 172.16.2.0 24
[R2]ip ip-prefix c permit 172.16.3.0 24
[R2]ip ip-prefix d permit 172.16.4.0 24
[R2]route-policy a permit node 10
[R2-route-policy]if-match ip-prefix a
[R2]route-policy a permit node 20
[R2-route-policy]if-match ip-prefix b
[R2-route-policy]apply cost-type type-1
[R2]route-policy a permit node 30
[R2-route-policy]if-match ip-prefix c
[R2-route-policy]apply cost 6
[R2]route-policy a permit node 40
[R2-route-policy]if-match ip-prefix d
[R2-route-policy]apply cost-type type-1
[R2-route-policy]apply cost 9
[R2]route-policy a permit node 50
[r2]ospf 1
[r2-ospf-1]import-route rip 1 route-policy a

stay R3 Look at the effect

   As mentioned above ： All the requirements of the experiment have been met  , Successful experiment .