HCIP--BGP小实验

172.16.0.0 24—30骨干

172.16.1.0 24—32建邻环回

172.16.2.0—172.16.7.0 24 用户网段

第一步 配置IP地址

AR1:

[r1]int LoopBack 0

[r1-LoopBack0]ip add 1.1.1.1 24

[r1-LoopBack0]q

[r1]int g0/0/0

[r1-GigabitEthernet0/0/0]ip add 12.1.1.1 24

AR2:

[r2]int LoopBack 0

[r2-LoopBack0]ip add 172.16.1.2 32

[r2-LoopBack0]q

[r2]int LoopBack 1

[r2-LoopBack1]ip add 172.16.2.1 24

[r2-LoopBack1]q

[r2]int g0/0/1

[r2-GigabitEthernet0/0/1]ip add 172.16.0.1 30

[r2]int g0/0/0

[r2-GigabitEthernet0/0/0]ip add 12.1.1.2 24

[r2-GigabitEthernet0/0/2]ip add 172.16.0.10 30

AR3:

[r3]int LoopBack 0

[r3-LoopBack0]ip add 172.16.1.3 32

[r3-LoopBack0]q

[r3-LoopBack1]ip add 172.16.3.1 24

[r3]int g0/0/0

[r3-GigabitEthernet0/0/0]ip add 172.16.0.2 30

[r3-GigabitEthernet0/0/0]int g0/0/1

[r3-GigabitEthernet0/0/1]ip add 172.16.0.5 30

AR4:

[r4]int LoopBack 0

[r4-LoopBack0]ip add 172.16.1.4 32

[r4-LoopBack0]q

[r4]int LoopBack 1

[r4-LoopBack1]ip add 172.16.4.1 24

[r4]int g0/0/0

[r4-GigabitEthernet0/0/0]ip add 172.16.0.6 30

[r4-GigabitEthernet0/0/0]int g0/0/1

[r4-GigabitEthernet0/0/1]ip add 172.16.0.21 30

AR5:

[r5]int LoopBack 0

[r5-LoopBack0]ip add 172.16.1.5 32

[r5-LoopBack0]q

[r5]int LoopBack 1

[r5-LoopBack1]ip add 172.16.5.1 24

[r5]int g0/0/0

[r5-GigabitEthernet0/0/0]ip add 172.16.0.9 30

[r5-GigabitEthernet0/0/0]int g0/0/1

[r5-GigabitEthernet0/0/1]ip add 172.16.0.13 30

AR6:

[r6]int LoopBack 0

[r6-LoopBack0]ip add 172.16.1.6 32

[r6-LoopBack0]q

[r6]int LoopBack 1

[r6-LoopBack1]ip add 172.16.6.1 24

[r6]int g0/0/0

[r6-GigabitEthernet0/0/0]ip add 172.16.0.14 30

[r6-GigabitEthernet0/0/0]int g0/0/1

[r6-GigabitEthernet0/0/1]ip add 172.16.0.17 30

AR7:

[r7]int LoopBack 0

[r7-LoopBack0]ip add 172.16.1.7 32

[r7-LoopBack0]q

[r7]int LoopBack 1

[r7-LoopBack1]ip add 172.16.7.1 24

[r7]int g0/0/1

[r7-GigabitEthernet0/0/1]ip add 78.1.1.1 24

[r7]int g0/0/0

[r7-GigabitEthernet0/0/0]ip add 172.16.0.18 30

[r7-GigabitEthernet0/0/0]int g0/0/2

[r7-GigabitEthernet0/0/2]ip add 172.16.0.22 30

AR8:

[r8]int g0/0/0

[r8-GigabitEthernet0/0/0]ip add 78.1.1.2 24

[r8-GigabitEthernet0/0/0]q

[r8]int LoopBack 0

[r8-LoopBack0]ip add 8.8.8.8 24

第二步 写OSPF路由

AR2:

[r2]ospf 1 router-id 2.2.2.2

[r2-ospf-1]area 0

[r2-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

[r2-ospf-1-area-0.0.0.0]q

AR3：

[r3]ospf 1 router-id 3.3.3.3

[r3-ospf-1]area 0

[r3-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

AR4:

[r4]ospf 1 router-id 4.4.4.4

[r4-ospf-1]area 0

[r4-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

AR5:

[r5]ospf 1 router-id 5.5.5.5

[r5-ospf-1]area 0

[r5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

AR6:

[r6]ospf 1 router-id 6.6.6.6

[r6-ospf-1]area 0

[r6-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

AR7:

[r7]ospf 1 router-id 7.7.7.7

[r7-ospf-1]area 0

[r7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

第三步 修改用户环回类型

AR2:                

[r2]int LoopBack 1

[r2-LoopBack1]ospf network-type broadcast

AR3:        

[r3]int LoopBack 1

[r3-LoopBack1]ospf network-type broadcast

AR4：

[r4]int LoopBack 1

[r4-LoopBack1]ospf network-type broadcast

AR5:

      [r5]int LoopBack 1

[r5-LoopBack1]ospf network-type broadcast

AR6:

[r6]int LoopBack 1

[r6-LoopBack1]ospf network-type broadcast

AR7:

[r7]int LoopBack 1

[r7-LoopBack1]ospf network-type broadcast

第四步 建立BGP路由

AR1:

[r1]bgp 1

[r1-bgp]router-id 1.1.1.1

[r1-bgp]peer 12.1.1.2 as-number 2

AR2:

[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 172.16.1.3 as-number 64512

[r2-bgp]peer 172.16.1.3 connect-interface LoopBack 0

[r2-bgp]peer 172.16.1.5 as-n

[r2-bgp]peer 172.16.1.5 as-number 64513

[r2-bgp]peer 172.16.1.5 connect-interface LoopBack 0

[r2-bgp]peer 12.1.1.1 as-number 1    

[r2-bgp]peer 172.16.1.5 ebgp-max-hop 2

AR3:

[r3]bgp 64512

[r3-bgp]router-id 3.3.3.3

[r3-bgp]confederation id 2

[r3-bgp]peer 172.16.1.2 as-number 64512

[r3-bgp]peer 172.16.1.2 connect-interface LoopBack 0

[r3-bgp]peer 172.16.1.4 as-number 64512

[r3-bgp]peer 172.16.1.4 connect-interface LoopBack 0

AR4:

[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 172.16.1.3 as-number 64512

[r4-bgp]peer 172.16.1.3 connect-interface LoopBack 0

[r4-bgp]peer 172.16.1.7 as-number 64513

[r4-bgp]peer 172.16.1.7 connect-interface LoopBack 0

[r4-bgp]peer 172.16.1.7 ebgp-max-hop 2

AR5:

[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 172.16.1.2 as-number 64512

[r5-bgp]peer 172.16.1.2 connect-interface LoopBack 0

[r5-bgp]peer 172.16.1.6 as-number 64513

[r5-bgp]peer 172.16.1.6 connect-interface LoopBack 0

[r5-bgp]peer 172.16.1.2 ebgp-max-hop 2

AR6:

[r6]bgp 64513

[r6-bgp]router-id 6.6.6.6

[r6-bgp]confederation id 2

[r6-bgp]peer 172.16.1.5 as-number 64513

[r6-bgp]peer 172.16.1.5 connect-interface LoopBack 0

[r6-bgp]peer 172.16.1.7 as-number 64513

[r6-bgp]peer 172.16.1.7 connect-interface LoopBack 0

AR7:

[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 172.16.1.4 as-number 64512

[r7-bgp]peer 172.16.1.4 connect-interface LoopBack 0

[r7-bgp]peer 172.16.1.4 ebgp-max-hop 2

[r7-bgp]peer 172.16.1.6 as-number 64513

[r7-bgp]peer 172.16.1.6 connect-interface LoopBack 0

[r7-bgp]peer 78.1.1.2 as-number 3

AR8:

[r8]bgp 3

[r8-bgp]router-id 8.8.8.8

[r8-bgp]peer 78.1.1.1 as-number 2

第五步 建立反射器 ，修改下一跳

AR1:

[r1]bgp 1

[r1-bgp]network 1.1.1.0 24

AR2:

[r2]bgp 64512

[r2-bgp]peer 172.16.1.3 next-hop-local

[r2-bgp]peer 172.16.1.5 next-hop-local

修改下一跳后AR3，5变优

汇总：写空接口宣告

[r2]ip route-static 172.16.0.0 21 null 0

[r2]bgp 64512

[r2-bgp]network 172.16.0.0 21

宣告空接口路由，可以访问172.16.0.0 21网段

AR3: 建立反射器，给AR4

[r3]bgp 64512

[r3-bgp]peer 172.16.1.4 reflect-client

AR4:

AR5:

AR6:

[r6]bgp 64513

[r6-bgp]peer 172.16.1.7 reflect-client

AR7:

[r7]bgp 64513

[r7-bgp]peer 172.16.1.4 next-hop-local

[r7-bgp]peer 172.16.1.6 next-hop-local

修改下一跳，AR4,AR6选路最优

同样设置空接口，避免AR2坏掉的时候还可以运行

[r7]ip route-static 172.16.0.0 21 null 0

[r7]bgp 64513

[r7-bgp]network 172.16.0.0 21

AR8:

[r8]bgp 3

[r8-bgp]network 8.8.8.0 24