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BGP小综合

news 2026/2/8 23:12:26

实验要求及拓扑

一、思路

1.使用OSPF使R2-R7之间可通。

2.各自宣告AS区域，两个区域两两之间建邻，AS2两个小区域之间建联邦（R2与R5、R4与R7）。

3.使R3、R6为路由反射器 RR反射器选取各小区域的路由器作为客户端、非客户端

4.优化路由表，汇总宣告ospf区域路由

二、上虚拟机操作

1.IP地址及环回地址配置

[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
[r1-GigabitEthernet0/0/0]int l0
[r1-LoopBack0]ip add 1.1.1.1 24

[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
[r2-GigabitEthernet0/0/0]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 172.16.0.1 30
[r2-GigabitEthernet0/0/1]int l0
[r2-LoopBack0]ip add 172.16.2.1 24
[r2]int g0/0/2
[r2-GigabitEthernet0/0/2]ip add 172.16.0.13 30

[r2]int l1
[r2-LoopBack1]ip add 172.16.1.1 24

[r3]int g0/0/0
[r3-GigabitEthernet0/0/1]int l0
[r3-LoopBack0]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

[r3]int l1
[r3-LoopBack1]ip add 172.16.8.1 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 172.16.0.9 30
[r4-LoopBack0]ip add 172.16.4.1 24

[r4]int l1
[r4-LoopBack1]ip add 172.16.9.1 24

[r5]int g0/0/1
[r5-GigabitEthernet0/0/1]ip add 172.16.0.14 30
[r5-GigabitEthernet0/0/1]int g0/0/0
[r5-GigabitEthernet0/0/0]ip add 172.16.0.17 30
[r5-GigabitEthernet0/0/0]int l0
[r5-LoopBack0]ip add 172.16.5.1 24

[r5]int l1
[r5-LoopBack1]ip add 172.16.10.1 24

[r6]int g0/0/1
[r6-GigabitEthernet0/0/1]ip add 172.16.0.18 30
[r6-GigabitEthernet0/0/1]int g0/0/0
[r6-GigabitEthernet0/0/0]ip add 172.16.0.21 30
[r6-GigabitEthernet0/0/0]int l0
[r6-LoopBack0]ip add 172.16.6.1 24

[r6]int l1
[r6-LoopBack1]ip add 172.16.11.1 24

[r7]int g0/0/0
[r7-GigabitEthernet0/0/0]ip add 78.1.1.2 24
[r7]int g0/0/1
[r7-GigabitEthernet0/0/1]ip add 172.16.0.22 30
[r7-GigabitEthernet0/0/0]int g0/0/2
[r7-GigabitEthernet0/0/1]ip add 172.16.0.10 30
[r7-GigabitEthernet0/0/2]int l0
[r7-LoopBack0]ip add 172.16.7.1 24

[r7]int l1
[r7-LoopBack1]ip add 172.16.12.1 24

[r8]int g0/0/0
[r8-GigabitEthernet0/0/0]ip add 78.1.1.1 24
[r8-GigabitEthernet0/0/0]int l0
[r8-LoopBack0]ip add 8.8.8.8 24

2.使用OSPF使R2-R7之间可通。

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 0
[r2-ospf-1-area-0.0.0.0]network 172.16.2.1 0.0.0.0
[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 172.16.0.13 0.0.0.0

[r2-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 0.0.0.0 255.255.255.255

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]network 0.0.0.0 255.255.255.255

[r5]ospf 1 router-id 5.5.5.5
[r5-ospf-1]area 0
[r5-ospf-1-area-0.0.0.0]network 0.0.0.0 255.255.255.255

[r6]ospf 1 router-id 6.6.6.6
[r6-ospf-1]area 0
[r6-ospf-1-area-0.0.0.0]network 0.0.0.0 255.255.255.255

[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]area 0
[r7-ospf-1-area-0.0.0.0]network 172.16.0.22 0.0.0.0
[r7-ospf-1-area-0.0.0.0]network 172.16.0.10 0.0.0.0
[r7-ospf-1-area-0.0.0.0]network 172.16.7.1 0.0.0.0

[r7-ospf-1-area-0.0.0.0]network 172.16.12.1 0.0.0.0

3.各自宣告AS区域，两个区域两两之间建邻，AS2两个小区域之间建联邦（R2与R5、R4与R7）。

AS1、2之间建邻

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

[r2]bgp 64512

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

[r2]confederation id 2
[r2-bgp]router-id 2.2.2.2

AS3、2之间建邻

[r7]bgp 64513

[r7-bgp]router-id 7.7.7.7
[r7-bgp]confederation id 2
[r7-bgp]peer 78.1.1.1 as-number 1

[r8]bgp 3
[r8-bgp]router-id 8.8.8.8
[r8-bgp]peer 78.1.1.2 as-number 2

小区域之间建邻

R2-R4

[r2-bgp]confederation id 2
[r2-bgp]peer 172.16.3.1 as-number 64512
[r2-bgp]peer 172.16.3.1 connect-interface LoopBack 0
[r2-bgp]peer 172.16.3.1 next-hop-local

[r3]bgp 64512
[r3-bgp]router-id 3.3.3.3
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.2.1 as-number 64512
[r3-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.4.1 as-number 64512
[r3-bgp]peer 172.16.4.1 connect-interface LoopBack 0

[r4]bgp 64512
[r4-bgp]router-id 4.4.4.4
[r4-bgp]confederation id 2
[r4-bgp]peer 172.16.3.1 as-number 64512
[r4-bgp]peer 172.16.3.1 connect-interface LoopBack 0
[r4-bgp]peer 172.16.3.1 next-hop-local

R4-R7

[r5]bgp 64513
[r5-bgp]router-id 5.5.5.5
[r5-bgp]confederation id 2
[r5-bgp]peer 172.16.6.1 as-number 64513
[r5-bgp]peer 172.16.6.1 connect-interface LoopBack 0
[r5-bgp]peer 172.16.6.1 next-hop-local

[r6]bgp 64513
[r6-bgp]router-id 6.6.6.6
[r6-bgp]confederation id 2
[r6-bgp]peer 172.16.5.1 as-number 64513
[r6-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[r6-bgp]peer 172.16.7.1 as-number 64513
[r6-bgp]peer 172.16.7.1 connect-interface LoopBack 0

[r7]bgp 64513
[r7-bgp]router-id 7.7.7.7
[r7-bgp]confederation id 2
[r7-bgp]peer 172.16.6.1 as-number 64513
[r7-bgp]peer 172.16.6.1 connect-interface LoopBack 0
[r7-bgp]peer 172.16.6.1 next-hop-local

AS2两个小区域之间建联邦

R2与R5

[r2-bgp]confederation peer-as 64512
[r2-bgp]peer 172.16.5.1 as-number 64513
[r2-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[r2-bgp] peer 172.16.5.1 ebgp-max-hop

[r5-bgp]confederation peer-as 64512

[r5-bgp]peer 172.16.2.1 as-number 64512
[r5-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[r5-bgp] peer 172.16.2.1 ebgp-max-hop