BGP experiment the next day

The experimental requirements ：
1.AS1 There are two loops , One address is 192.168.1.0/24, This address cannot be declared in any agreement ;AS3 There are two loops , One address is 192.168.2.0/24, This address cannot be declared in any agreement , Finally, it is required that the two loops can communicate with each other ;
2. Whole AS2 Of ip The address is 172.16.0.0, Please make a reasonable division ;
3.AS Backbone link between IP The address can be customized at will ;
4. Use BGP The protocol allows the loopback of all devices in the whole network to access each other ;
5. Reduce the number of entries , Avoid loop problems .

Experimental Topology ：

Experimental configuration ：
IP The address is configured as shown in the figure below ：

The specific configuration commands are as follows ：
R2：

[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 172.16.0.1 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 172.16.32.1 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 172.16.64.1 0.0.0.0

R3：

[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 172.16.64.2 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 172.16.96.1 0.0.0.0

R4：

[R4]ospf 1 router-id 4.4.4.4
[R4-ospf-1]area 0
[R4-ospf-1-area-0.0.0.0]network 172.16.2.1 0.0.0.0
[R4-ospf-1-area-0.0.0.0]network 172.16.96.2 0.0.0.0
[R4-ospf-1-area-0.0.0.0]network 172.16.224.1 0.0.0.0

R5：

[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 172.16.128.1 0.0.0.0
[R5-ospf-1-area-0.0.0.0]network 172.16.32.2 0.0.0.0
[R5-ospf-1-area-0.0.0.0]network 172.16.160.1 0.0.0.0

R6：

[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]network 172.16.129.1 0.0.0.0
[R6-ospf-1-area-0.0.0.0]network 172.16.160.2 0.0.0.0
[R6-ospf-1-area-0.0.0.0]network 172.16.192.1 0.0.0.0

R7：

[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1]area 0
[R7-ospf-1-area-0.0.0.0]network 172.16.192.2 0.0.0.0
[R7-ospf-1-area-0.0.0.0]network 172.16.224.2 0.0.0.0
[R7-ospf-1-area-0.0.0.0]network 172.16.128.2 0.0.0.0

start-up BGP agreement ：
R1：

[R1]bgp 1
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 12.1.1.2 as-number 2

R2：

[R2]bgp 64512
[R2-bgp]router-id 2.2.2.2
[R2-bgp]confederation id 2	
[R2-bgp]confederation peer-as 64513
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 172.16.1.1 as-number 64512
[R2-bgp]peer 172.16.1.1 connect-interface LoopBack 0
[R2-bgp]peer 172.16.128.1 as-number 64513
[R2-bgp]peer 172.16.128.1 connect-interface LoopBack 0
[R2-bgp]peer 172.16.128.1 ebgp-max-hop 2

R3：

[R3]bgp 64512
[R3-bgp]router-id 3.3.3.3	
[R3-bgp]confederation id 2
[R3-bgp]peer 172.16.0.1 as-number 64512
[R3-bgp]peer 172.16.0.1 connect-interface LoopBack 0
[R3-bgp]peer 172.16.2.1 as-number 64512
[R3-bgp]peer 172.16.2.1 connect-interface LoopBack 0

R4：

[R4]bgp 64512
[R4-bgp]router-id 4.4.4.4
[R4-bgp]confederation id 2
[R4-bgp]confederation peer-as 64513
[R4-bgp]peer 172.16.1.1 as-number 64512
[R4-bgp]peer 172.16.1.1 connect-interface LoopBack 0
[R4-bgp]peer 172.16.130.1 as-number 64513
[R4-bgp]peer 172.16.130.1 connect-interface LoopBack 0
[R4-bgp]peer 172.16.130.1 ebgp-max-hop 2

R5：

[R5]bgp 64513
[R5-bgp]router-id 5.5.5.5
[R5-bgp]confederation id 2
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 172.16.0.1 as-number 64512
[R5-bgp]peer 172.16.0.1 connect-interface LoopBack 0
[R5-bgp]peer 172.16.0.1 ebgp-max-hop 2
[R5-bgp]peer 172.16.129.1 as-number 64512
[R5-bgp]peer 172.16.129.1 connect-interface LoopBack 0

R6：

[R6]bgp 64513
[R6-bgp]router-id 6.6.6.6
[R6-bgp]confederation id 2
[R6-bgp]peer 172.16.128.1 as-number 64513
[R6-bgp]peer 172.16.128.1 connect-interface LoopBack 0
[R6-bgp]peer 172.16.130.1 as-number 64513
[R6-bgp]peer 172.16.130.1 connect-interface LoopBack 0

R7：

[R7]bgp 64513
[R7-bgp]router-id 7.7.7.7
[R7-bgp]confederation id 2
[R7-bgp]confederation peer-as 64512
[R7-bgp]peer 172.16.129.1 as-number 64513
[R7-bgp]peer 172.16.129.1 connect-interface LoopBack 0
[R7-bgp]peer 172.16.2.1 as-number 64512
[R7-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[R7-bgp]peer 172.16.2.1 ebgp-max-hop 2
[R7-bgp]peer 23.1.1.2 as-number 3

R8：

[R8]bgp 3
[R8-bgp]router-id 8.8.8.8
[R8-bgp]peer 23.1.1.1 as-number 2

Announce segment ：
R1 and R2 On ：

R1]bgp 1
[R1-bgp]network 10.1.1.0 24

[R2]bgp 64512
[R2-bgp]peer 172.16.2.1 next-hop-local
[R2-bgp]peer 172.17.4.1 next-hop-local
[R2-bgp]peer 172.16.4.1 next-hop-local

R3 and R6 Open reflector ：

R3：

[R3]bgp 64512
[R3-bgp]peer 172.16.3.1 reflect-client 

R6：

[R6]bgp 64513
[R6-bgp]peer 172.16.4.1 reflect-client 

R7 and R8：

[R7]bgp 64513
[R7-bgp]peer 172.16.3.1 next-hop-local
[R7-bgp]peer  172.16.5.1 next-hop-local

[R8]bgp 3
[R8-bgp]network 10.1.2.0 24

[R2]ip route-static  172.16.0.0  21 NULL 0
[R2]bgp 64512
[R2-bgp]network 172.16.0.0 21

[R7]ip route-static 172.16.0.0 21 NULL 0
[R7]bgp 64513
[R7-bgp]network 172.16.0.0 21

In order to make 192.168.1.1 and 192.168.2.1 Can communicate , To use tunnel, Write a static route ：
Use GRE：

[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]ip address 10.1.3.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre 
[R1-Tunnel0/0/0]source 10.1.1.1
[R1-Tunnel0/0/0]destination 10.1.2.1

[R8]int Tunnel 0/0/0
[R8-Tunnel0/0/0]ip address 10.1.3.2 24
[R8-Tunnel0/0/0]tunnel-protocol  gre
[R8-Tunnel0/0/0]source 10.1.2.1
[R8-Tunnel0/0/0]destination 10.1.1.1

[R8]ip route-static 192.168.1.0 24 Tunnel 0/0/0
[R8]ip route-static 192.168.2.0 24 10.1.3.2