Experiment 5 OSPF comprehensive experiment

 1. Divide network segments

2. Connect to the public network

3. MGRE Environmental Science

R3-R5-R6-R7 stay MGRE It is necessary to change the working mode of the interface to P2MP type

 [r3]int t 0/0/0
 [r3-Tunnel0/0/0]ospf network-type p2mp

R5 Expand the routing table , You can't learn RIP Area ( Republish )  as well as area 4( Irregular areas ) Routing information for

[r12]ospf
[r12-ospf-1]import-route rip

One way republishing solves the problem of irregular areas

 

 

4. Reduce LSA Update quantity of

Summary --- Write an empty interface where there is a summary NULL 0

1. Inter domain summary   R3-R6-R7

 2. Total foreign exchange in the region R12-R9

 R5 View the routing table on the (display ip routing-table protocol ospf)

  problem 1：AREA 2 Why did you send two routing entries

reason ：RIP The direct network segment corresponding to the activated interface includes 172.16.65.8 This article

problem 2： Before and after the summary 172.16.65.8 Of protocol Fields are created by OSPF Turn into O_ASE

reason ： When there is no summary , adopt R6 The learned routing information , One is of three categories and the other is of five categories ( Three categories are better than five ) Load into R5 There are only three types on the routing table . The summary was made ,R6 Learning the equivalent of two routing details .

Special area

Respectively in area 1 area 2 area 3 Configure special areas on

  to area 4 Issue default

  Now the whole intranet is accessible

5. Speed up convergence

[r3] int t 0/0/0

[r3] ospf timer hello 10

6. All devices are accessible R4 Loopback ---NAT technology

R3-R5-R6-R7 All need to be done NAT technology