Routing strategy of multi-point republication [Huawei]

One 、 The experiment purpose

Master multipoint republication configuration and routing configuration

Two 、 Experimental topics

1. Multi point dual release between the two protocols
2.R7 The loopback of did not announce OSPF Agreement , It's re released later
3. Solution loop , All paths are chosen optimally , And there is a backup
Be careful ：
1. If you want to generate a loop, you should first R7 Republish
2.R3 The loopback of wants to be sent to R2 Configure to 32 Bitmask 【 stay ospf Agreement , Loopback works by default based on 32 Bit host routing for delivery . If the masks are inconsistent , Will lead to routing problems 】

3、 ... and 、 Experimental Topology

Four 、 Experimental configuration

One 、IP Address and loopback configuration

R1

R2

R3

R4

R5

R6

R7

Two 、 Conduct RIP Deal with the OSPF Division of agreements , And declare the establishment of adjacency .

R1

RIP

R2

RIP

OSPF

R3

RIP

OSPF

R4

OSPF

R5

OSPF

R6

OSPF

R7

OSPF

3、 ... and 、 Complete the experimental requirements for R2/3/7 Reissue 【 For this reason, there must be loopback. Remember to give priority R7 Reissue 】

1.R7 First republish the loopback reason ：

Because if first R2/3 Reissue , Then the information will be sent to R1 Then the route knows R1 To R2/3 Just connect directly .
If first R7 Then send a message , To R4 It will send information to R2 And R3 . then R2/3 Post it again to R1,R1 Will send information to R2/3; here R2/3 Received at the same time R1 And R4 Send the same details and their priority is the same at this time .R2/3 received R1 Will be sent to R4 , At this time, the ratio measurement . After comparison R2/3 Small hair R4.R4 And send it to R5/6/7, however R6 It will also send a route to R5,R7 Send route to R5 It's a ring

Solution loop ：

modify R2/3 And R4 The priority of the

2. Configure republishing

R7

Because loopback is a direct connection

R2

R3

R4/5 Cyclization

3.R2/3 Configure routing policy modification priority

R3

R2

5. Whether there is loopback inspection

result ：
It can be seen from the routing table that there is no loopback

R4 Routing table

R5 Routing table

R6 Routing table

5. Best routing

because R1 Go to 24.0.0.0 24 It's best to go up , Go to 34.0.0.0 24 It's best to go down . Load balancing of other network segments

R2

R3

R1 Routing table

R2 Routing table

R3 Routing table

5、 ... and 、 Summary of the experiment

This experiment has no problem with the use of routing strategies, that is, it is unskilled , Then there is a problem with the policy selection protocol for republishing . The main thing is to know that loopback is RIP Sending back is missing OSPF Applied strategy . There are no other problems in the experiment .