BGP first experiment

Design topology, configure ip ;

1--EBGP neighbor relationship establishment: (r1-r2 r4-r5)

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

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.1.1.1 as-number 1

2--IBGP neighbor relationship establishment: r2-r3-r4:

[r2]bgp 2

[r2-bgp]peer 3.3.3.3 as-number 2

[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0

3--EBGP has multiple physical links, use loopback to build neighbors: use static ip;

[Huawei]bgp 3
[Huawei-bgp]router-id 5.5.5.5
[Huawei-bgp]peer 4.4.4.4 as-number 2
[Huawei-bgp]peer 4.4.4.4 connect-interface LoopBack 0

4--Create ospf Declaration:

R1:

R2:

R3:

R4:

R5:

Based on the AS-BY-AS rule, the entry attribute will not be modified when the entry is passed within an AS; resulting in BGP routes learned through IBGP neighborsThe next hop may be unreachable; resulting in poor entry;

[r2-bgp]peer 3.3.3.3 next-hop-local

For each loopback declaration:

[r1-bgp]network 11.1.1.0 24

Final routing table:

R5ping R1