第7章 BGP负载均衡

7.1 IBGP等价负载均衡

1.R1配置BGP

[R1]bgp 100
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 12.1.1.2 as-number 234
[R1-bgp]peer 13.1.1.3 as-number 234
[R1-bgp]network 1.1.1.1 32

2.R2配置BGP

[R2]bgp 234
[R2-bgp]router-id 2.2.2.2
[R2-bgp]peer 4.4.4.4 as-number 234
[R2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[R2-bgp]peer 4.4.4.4 next-hop-local
[R2-bgp]peer 12.1.1.1 as-number 100

3.R3配置BGP

[R3]bgp 234
[R3-bgp]router-id 3.3.3.3
[R3-bgp]peer 4.4.4.4 as-number 234
[R3-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[R3-bgp]peer 4.4.4.4 next-hop-local
[R3-bgp]peer 13.1.1.1 as-number 100[R3]bgp 234
[R3-bgp]router-id 3.3.3.3
[R3-bgp]peer 4.4.4.4 as-number 234
[R3-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[R3-bgp]peer 4.4.4.4 next-hop-local
[R3-bgp]peer 13.1.1.1 as-number 100

4.R4配置BGP

[R4]bgp 234
[R4-bgp]router-id 4.4.4.4
[R4-bgp]peer 2.2.2.2 as-number 234
[R4-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[R4-bgp]peer 3.3.3.3 as-number 234
[R4-bgp]peer 3.3.3.3 connect-interface LoopBack 0

5.R4查看BGP

[R4]display bgp routing-table
 *>i  1.1.1.1/32         2.2.2.2         0          100        0      100i
 * i                     3.3.3.3         0          100        0      100i

5.R4查看到1.1.1.1/32路由详细信息

[R4]display  ip routing-table 1.1.1.1 
  1.1.1.1/32  IBGP    255  0          RD   2.2.2.2         GigabitEthernet0/0/1

6.R4开启负载均衡，查看路由信息

[R4]bgp 234
[R4-bgp]maximum load-balancing ibgp 2
[R4]display  ip routing-table 1.1.1.1
  1.1.1.1/32  IBGP    255  0          RD   2.2.2.2         GigabitEthernet0/0/1
                    IBGP    255  0          RD   3.3.3.3         GigabitEthernet0/0/0