r1:

<Huawei>sys
[Huawei]sys r1
[r1]int g 0/0/1
[r1-GigabitEthernet0/0/1]ip add 12.1.1.1 24
[r1-GigabitEthernet0/0/1]int lo0
[r1-LoopBack0]ip add 1.1.1.1 24

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]ar 0
[r2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255
[r2-ospf-1-area-0.0.0.0]network 2.2.2.0 0.0.0.255

[r1]bgp 1
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 12.1.1.2 as-number 2

[r1-bgp]net 1.1.1.0 24

r2:

<Huawei>sys
[Huawei]sy r2
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
[r2-GigabitEthernet0/0/0]int g 0/0/1
[r2-GigabitEthernet0/0/1]ip add 23.1.1.1 24
[r2-GigabitEthernet0/0/1]int lo0
[r2-LoopBack0]ip add 2.2.2.2 24

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.1.1.1 as-number 1
[r2-bgp]q
[r2]bgp 2
[r2-bgp]peer 3.3.3.3 as-number 2
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0

[r2-bgp]peer 4.4.4.4 as-number 2
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0

[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]peer 4.4.4.4 next-hop-local
[r2-bgp]network 2.2.2.0 24

r3:

<Huawei>sys
[Huawei]sy r3
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 23.1.1.2 24
[r3-GigabitEthernet0/0/0]int g 0/0/1
[r3-GigabitEthernet0/0/1]ip add 34.1.1.1 24
[r3-GigabitEthernet0/0/1]int lo0
[r3-LoopBack0]ip add 3.3.3.3 24


[r4]ospf 1 rou 3.3.3.3
[r4-ospf-1]ar 0
[r4-ospf-1-area-0.0.0.0]net 3.3.3.3 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net 23.1.1.0 0.0.0.255
[r3-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255

[r3]bgp 2
[r3-bgp]peer 2.2.2.2 as-number 2
[r3-bgp]peer 2.2.2.2 connect-interface lo0
[r3-bgp]peer 4.4.4.4 as-number 2
[r3-bgp]peer 4.4.4.4 connect-interface lo0

[r3-bgp]net 3.3.3.0 24

r4:

<Huawei>sys 
[Huawei]sys r4
[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]ip add 34.1.1.2 24
[r4-GigabitEthernet0/0/0]int g 0/0/1
[r4-GigabitEthernet0/0/1]ip add 45.1.1.1 24
[r4-GigabitEthernet0/0/1]int  g 0/0/2
[r4-GigabitEthernet0/0/2]ip add 45.1.2.1 24
[r4-GigabitEthernet0/0/2]int lo0
[r4-LoopBack0]ip add 4.4.4.4 24

[r4]ospf 1 rou 4.4.4.4
[r4-ospf-1]ar 0
[r4-ospf-1-area-0.0.0.0]net 4.4.4.4 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net 34.1.1.0 0.0.0.255

[r4]bgp 2
[r4-bgp]peer 2.2.2.2 as-number 2
[r4-bgp]peer 2.2.2.2 connect-interface lo0
[r4-bgp]peer 3.3.3.3 as-number 2
[r4-bgp]peer 3.3.3.3 connect-interface lo0

[r4]ip route-static 5.5.5.5 255.255.255.255 45.1.1.2
[r4]ip route-static 5.5.5.5 255.255.255.255 45.1.2.2
[r4]ip route-static 99.1.1.1 255.255.255.255 45.1.1.2
[r4]ip route-static 99.1.1.1 255.255.255.255 45.1.2.2

[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 5.5.5.5 as-number 3
[r4-bgp]peer 5.5.5.5 connect-interface lo0
[r4-bgp]peer 5.5.5.5 ebgp-max-hop 2

[r4-bgp]net 4.4.4.0 24

[r4-bgp]peer 3.3.3.3 next-hop-local
[r4-bgp]peer 2.2.2.2 next-hop-local

r5:

<Huawei>sys
[Huawei]sys	
[Huawei]sysname r5
[r5]int g 0/0/0
[r5-GigabitEthernet0/0/0]ip add 45.1.1.2 24
[r5-GigabitEthernet0/0/0]int g 0/0/1
[r5-GigabitEthernet0/0/1]ip add 45.1.2.2 24
[r5-GigabitEthernet0/0/1]int lo0
[r5-LoopBack0]ip add 5.5.5.5 24
[r5-LoopBack0]int lo1
[r5-LoopBack1]ip add 99.1.1.1 24

[r5]ip route-static 4.4.4.4 255.255.255.255 45.1.1.1
[r5]ip route-static 4.4.4.4 255.255.255.255 45.1.2.1

[r5]bgp 3
[r5-bgp]router 5.5.5.5
[r5-bgp]peer 4.4.4.4 as-number 2
[r5-bgp]peer 4.4.4.4 connect-interface lo0
[r5-bgp]peer 4.4.4.4 ebgp-max-hop 2