MPLS experiment

The questions are as follows ：

The topology is as follows ：

experimental analysis ：

1. First of all, we should put the public network, that is R2 R3 R4 R7 Between IP And route configuration , however R7 The client side. , So we need to give R4 Set up a silent interface , And in R7 Write one to R4 The default route for ：

R2：

R3：

R4：

R7：

At this time, our public network can be interconnected , We can do it in R7 On PING once 2.2.2.2：

 

2. After the public network can be interconnected , We need to start MPLS service , To create VRF Space ：  

[R2]mpls lsr-id 2.2.2.2
[R2]mpls
[R2-mpls]mpls ldp
[R2-mpls-ldp]int g0/0/0
[R2-GigabitEthernet0/0/0]mpls 
[R2-GigabitEthernet0/0/0]mpls ldp 

[R3]mpls lsr-id  3.3.3.3
[R3] mpls
[R3-mpls] mpls ldp
[R3-mpls-ldp]int g0/0/1
[R3-GigabitEthernet0/0/1] mpls
[R3-GigabitEthernet0/0/1] mpls ldp
[R3-GigabitEthernet0/0/1]int g0/0/0
[R3-GigabitEthernet0/0/0] mpls
[R3-GigabitEthernet0/0/0] mpls ldp

[R4]mpls lsr-id 4.4.4.4
[R4] mpls
[R4-mpls] mpls ldp
[R4-mpls-ldp]int g0/0/1
[R4-GigabitEthernet0/0/1] mpls
[R4-GigabitEthernet0/0/1] mpls ldp

So our MPLS The environment is set up . Next we can go to R2 R4 Do on VRF There's space ：   
[R2]ip vpn-instance b1   
[R2-vpn-instance-b1]ipv4-family    
[R2-vpn-instance-b1-af-ipv4]route-distinguisher 1:1  
[R2-vpn-instance-b1-af-ipv4]vpn-target 1:1

[R2]ip vpn-instance a1  
[R2-vpn-instance-a1]ipv4-family    
[R2-vpn-instance-a1-af-ipv4]route-distinguisher 2:2   
[R2-vpn-instance-a1-af-ipv4]vpn-target 2:2

[R4]ip vpn-instance b2
[R4-vpn-instance-b2]ipv4-family  
[R4-vpn-instance-b2-af-ipv4]route-distinguisher 1:1
[R4-vpn-instance-b2-af-ipv4]vpn-target 1:1

[R4]ip vpn-instance a2 
[R4-vpn-instance-a2]ipv4-family   
[R4-vpn-instance-a2-af-ipv4]route-distinguisher 2:2
[R4-vpn-instance-a2-af-ipv4]vpn-target 2:2

So we can create two spaces ; We need to bind these two spaces to two interfaces and configure IP Address ：

[R2-GigabitEthernet0/0/1]ip binding vpn-instance b1
[R2-GigabitEthernet0/0/1]ip address 192.168.2.2 24

[R2-GigabitEthernet0/0/2]ip binding vpn-instance a1
[R2-GigabitEthernet0/0/2]ip address 192.168.2.2 24

[R4-GigabitEthernet0/0/0]ip binding vpn-instance b2 
[R4-GigabitEthernet0/0/0]ip address 192.168.3.1 24

[R4-GigabitEthernet0/0/2]ip binding vpn-instance a2  
[R4-GigabitEthernet0/0/2]ip address 192.168.3.1 24

And then we were in R2 R4 Build a MP-BGP neighbor ：

[R2]bgp 1
[R2-bgp]router-id 2.2.2.2 
[R2-bgp]peer 4.4.4.4 as-number 1
[R2-bgp]peer 4.4.4.4 connect-interface LoopBack 0   
[R2-bgp]ipv4-family vpnv4
[R2-bgp-af-vpnv4]peer 4.4.4.4 enable 

[R4-bgp]router-id 4.4.4.4
[R4-bgp]peer 2.2.2.2 as-number 1
[R4-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[R4-bgp]ipv4-family vpnv4
[R4-bgp-af-vpnv4]peer 2.2.2.2 enable 

So far, all configurations of our public network have been completed .

3. Next is the configuration of customer network segment ：

The private network IP:

R1:

R5:

R6:

R7:

4. We will first A1 A2 For internal use RIP And OSPF Get through , Through BGP Two way republication and mutual learning routing  

A1:

[R6]rip 1
[R6-rip-1]ver 2
[R6-rip-1]network 192.168.1.0 
[R6-rip-1]network 192.168.2.0

[R2]rip 1 vpn-instance a1
[R2-rip-1]ver 2
[R2-rip-1]network 192.168.2.0
Then we can go to R2 Take a look VPN Routes in space ：

A2:

[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1]area 0
[R7-ospf-1-area-0.0.0.0]network 192.168.3.2 0.0.0.0
[R7-ospf-1-area-0.0.0.0]network 192.168.4.2 0.0.0.0

  
[R4]ospf 2 vpn-instance a2 
[R4-ospf-2]area 0 
[R4-ospf-2-area-0.0.0.0]network 192.168.3.1 0.0.0.0

We will in R4 Take a look VPN Routes in space ：

  And then we can go in R2 R4 Two way republishing on ：

R2：

[R2]rip 1 vpn-instance a1   
[R2-rip-1]import-route bgp 
[R2-rip-1]q
[R2]bgp 1  
[R2-bgp]ipv4-family vpn-instance a1  
[R2-bgp-a1]import-route rip 1
 

R4：

[R4-bgp]ipv4-family vpn-instance a2  
[R4-bgp-a2]import-route ospf 2
[R4-bgp-a2]q
[R4-bgp]q  
[R4]ospf 2 vpn-instance a2
[R4-ospf-2]import-route bgp 

We are R6 R7 Take a look at the routing table ：

 

We can see R6 R7 Have learned each other's routing ; We are R6 On can PING once 192.168.4.2

Then we A1 A2 Regional MPLS VPN Just set it up .

5.B1 B2 Of MPLS VPN We need to build it , Because it is static routing , So we need to add the route to them manually ：

[R1]ip route-static 192.168.3.0 24 192.168.2.2
[R1]ip route-static 192.168.4.0 24 192.168.2.2

[R2]ip route-static vpn-instance b1 192.168.1.0 24 192.168.2.1
[R2]bgp 1  
[R2-bgp]ipv4-family vpn-instance b1  
[R2-bgp-b1]import-route static  
[R2-bgp-b1]import-route direct 

[R5]ip route-static 192.168.1.0 24 192.168.3.1
[R5]ip route-static 192.168.2.0 24 192.168.3.1

[R4]ip route-static vpn-instance b2 192.168.4.0 24 192.168.3.2
[R4]bgp 1      
[R4-bgp]ipv4-family vpn-instance b2  
[R4-bgp-b2]import-route static 
[R4-bgp-b2]import-route direct 

Let's see R2 R4 BGP VPN Routing table in space ：

R1 PING once 192.168.4.1：

thus , End of experiment .