[hcip] OSPF experiment under mGRE environment, including multi process bidirectional republication and OSPF special area

The experimental requirements

1. R4 by ISP, The public network is configured on it IP
2. R3-5/6/7 by MGRE Environmental Science ,R3 For the central site
3. Whole OSPF Environmental Science IP The address is 172.16.0.0/16
4. All devices are accessible R4 The loopback of
5. Reduce LSA Update quantity of , Speed up convergence , To ensure the security of updates
6. Network wide accessibility
   

Experimental process

Subnet partition

There are 6 Regions , Generally, it is divided into 6 Large network segment — draw 8 Paragraph borrowing 3 position

172.16.0.0/16
-------------
172.16.0.0/19
172.16.32.0/19
172.16.64.0/19
172.16.96.0/19
172.16.128.0/19
172.16.160.0/19
172.16.192.0/19	// Abandon 
172.16.224.0/19	// Abandon 

area 0 China needs 1 individual Tunnel and 1 Loop back — draw 2 Paragraph borrowing 1 position

172.16.0.0/19
-------------
172.16.0.0/20
172.16.16.0/20

area 1 China needs 1 paragraph MA The Internet and 3 Loop back — draw 4 Paragraph borrowing 2 position

172.16.32.0/19
--------------
172.16.32.0/21
172.16.40.0/21
172.16.48.0/21
172.16.56.0/21

area 2 China needs 2 paragraph MA The Internet and 2 Loop back — draw 4 Paragraph borrowing 2 position

172.16.64.0/19
--------------
172.16.64.0/21
172.16.72.0/21
172.16.80.0/21
172.16.88.0/21

area 3 China needs 2 paragraph MA The Internet and 2 Loop back — draw 4 Paragraph borrowing 2 position

172.16.96.0/19
--------------
172.16.96.0/21
172.16.104.0/21
172.16.112.0/21
172.16.120.0/21

area 4 China needs 1 individual MA The Internet and 2 Loop back — draw 4 Paragraph borrowing 2 position

172.16.128.0/19
---------------
172.16.128.0/21
172.16.136.0/21
172.16.144.0/21
172.16.152.0/21	// Abandon 

rip China needs 2 Loop back — draw 2 Paragraph borrowing 1 position

172.16.160.0/19
---------------
172.16.160.0/20
172.16.176.0/20

To configure IP Address

R1 ping R3：

R3 ping R4：

Default route +NAT address translation

//R3 -  example 
#
ip route-static 0.0.0.0 0.0.0.0 34.1.1.4
#
acl number 2000  
 rule 1 permit 
#
interface Serial4/0/0
 link-protocol ppp
 ip address 34.1.1.3 255.255.255.0 
 nat outbound 2000
#

R7 ping R4 Loopback ：

MGRE

//R3 -  Central site 
interface Tunnel0/0/0
 ip address 172.16.0.3 255.255.240.0 
 tunnel-protocol gre p2mp
 source 34.1.1.3
 nhrp entry multicast dynamic
 nhrp network-id 100
//R5
interface Tunnel0/0/0
 ip address 172.16.0.5 255.255.240.0 
 tunnel-protocol gre p2mp
 source Serial4/0/0
 nhrp network-id 100
 nhrp entry 172.16.0.3 34.1.1.3 register
//R6
interface Tunnel0/0/0
 ip address 172.16.0.6 255.255.240.0 
 tunnel-protocol gre p2mp
 source Serial4/0/0
 nhrp network-id 100
 nhrp entry 172.16.0.3 34.1.1.3 register
//R7
interface Tunnel0/0/0
 ip address 172.16.0.7 255.255.240.0 
 tunnel-protocol gre p2mp
 source Serial4/0/0
 nhrp network-id 100
 nhrp entry 172.16.0.3 34.1.1.3 register

OSPF

//R3 -  example 
ospf 1 router-id 3.3.3.3 
 area 0.0.0.0 
  network 172.16.0.3 0.0.0.0 
 area 0.0.0.1 
  network 172.16.32.3 0.0.0.0 
  network 172.16.56.1 0.0.0.0

because R3-5/6/7 be in MGRE Environment , Needs to be Tunnel The interface is modified to p2mp

//R3 -  example 
[R3]int t0/0/0
[R3-Tunnel0/0/0]ospf network-type p2mp

At this time, except RIP and OSPF area 4 The whole network can reach
Route table display ：

RIP And republish

First the OSPF Of area 4 Reissue

//R9
#
ospf 1 router-id 9.9.9.9 
 import-route ospf 2
 area 0.0.0.3 
  network 172.16.104.9 0.0.0.0
#
ospf 2 router-id 9.9.9.9 
 import-route ospf 1
 area 0.0.0.4 
  network 172.16.128.9 0.0.0.0 
  network 172.16.136.1 0.0.0.0
#

RIP And republish

//R12
#
rip 1
 version 2
 network 172.16.0.0
 import-route ospf 1
#
ospf 1 router-id 12.12.12.12 
 import-route rip 1
 area 0.0.0.2 
  network 172.16.72.12 0.0.0.0 
#

Route table display （R3）：

R10 Loopback ping R12 Loopback ：

Route summary

Intra domain routing summary ：

//R6 -  example 
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
// Air interface anti loop routing 
[R6]ip route-static 172.16.64.0 19 NULL 0

Extraterritorial routing summary ：

//R9
[R9]ospf 1
[R9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
// Air interface anti loop routing 
[R9]ip route-static 172.16.128.0 19 NULL 0
//R12
[R12]ospf 1
[R12-ospf-1]asbr-summary 172.16.160.0 255.255.224.0
[R12-ospf-1]q
[R12]ip route-static 172.16.160.0 19 NULL 0

Route table display ：

Special area

Completely peripheral area

//R1
[R1]ospf 1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]stub
//R2
[R2]ospf 1
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]stub
//R3
[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]stub no-summary

Completely NSSA

//R6
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.2]nssa no-summary
//R11
[R11]ospf 1
[R11-ospf-1]area 2
[R11-ospf-1-area-0.0.0.1]nssa
//R12
[R12]ospf 1
[R12-ospf-1]area 2
[R12-ospf-1-area-0.0.0.2]nssa
---------------------------------------
//R7
[R7]ospf 1
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.3]nssa no-summary
//R8
[R8]ospf 1
[R8-ospf-1]area 3
[R8-ospf-1-area-0.0.0.3]nssa
//R9
[R9]ospf 1
[R9-ospf-1]area 3
[R9-ospf-1-area-0.0.0.3]nssa

Route table display ：



here R10 You should also write a point R9 Default

[R10]ip route-static 0.0.0.0 0 172.16.128.9

Accelerate convergence and certification

//R9
[R9]interface s4/0/1
[R9-Serial4/0/1]ospf timer hello 5
[R9-Serial4/0/1]ospf authentication-mode md5 1 cipher huawei
//R10
[R10]interface s4/0/0
[R10-Serial4/0/0]ospf timer hello 5
[R10-Serial4/0/0]ospf authentication-mode md5 1 cipher huawei

Routing table display and connectivity test

Connectivity testing ：
R1 Loopback ping R12 Loopback and extranet

R10 Loopback ping R12 Loopback and extranet