深入解析：BGP综合实验

一、实验拓扑图

二、实验要求

  1. AS1 的 192.168.1.0/24 和 AS3 的 192.168.2.0/24 不通过任何路由协议宣告，但需实现互通。
  2. R1-R8 的建邻环回均使用 x.x.x.x/32（如 R1 环回 L0 为 1.1.1.1/32）。
  3. AS2 内部使用 172.16.0.0/16 网段，R3-R7 各有一个业务网段（172.16.3.0/24 至 172.16.7.0/24），并通过 OSPF 协议互通。
  4. AS 间骨干链路 IP 地址按需规划（如 R1-R2 为 12.1.1.0/24）。
  5. 通过 BGP 协议实现全网设备环回及业务网段的互通。
  6. 优化路由条目，通过联邦、路由反射器等技术避免环路。

三、实验思路

1、配置IP地址

2、将AS2内部配置OSPF协议

3、配置BGP协议

4、宣告AS2内部的业务网段

5、建立GRE VPN隧道

四、实验步骤

1.IP地址配置

[R1]INT G 0/0/0
[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 32
[R1-GigabitEthernet0/0/0]INT L1
[R1-LoopBack1]IP ADD 192.168.1.1 24
[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 172.16.1.1 30
[R2-GigabitEthernet0/0/1]INT G 0/0/2
[R2-GigabitEthernet0/0/2]IP ADD 172.16.1.21 30
[R2-GigabitEthernet0/0/2]INT L0
[R2-LoopBack0]IP ADD 2.2.2.2 32
[R3]INT G 0/0/0
[R3-GigabitEthernet0/0/0]IP ADD 172.16.1.2 30
[R3-GigabitEthernet0/0/0]INT G 0/0/1
[R3-GigabitEthernet0/0/1]IP ADD 172.16.1.5 30
[R3-GigabitEthernet0/0/1]INT L0
[R3-LoopBack0]IP ADD 3.3.3.3 32
[R3-LoopBack0]INT L1
[R3-LoopBack1]IP ADD 172.16.3.3 24
[R4]INT G 0/0/0
[R4-GigabitEthernet0/0/0]IP ADD 172.16.1.6 30
[R4-GigabitEthernet0/0/0]INT G 0/0/1
[R4-GigabitEthernet0/0/1]IP ADD 172.16.1.9 30
[R4-GigabitEthernet0/0/1]INT L0
[R4-LoopBack0]IP ADD 4.4.4.4 32
[R4-LoopBack0]INT L1
[R4-LoopBack1]IP ADD 172.16.4.4 24
[R5]INT G 0/0/0
[R5-GigabitEthernet0/0/0]IP ADD 172.16.1.22 30
[R5-GigabitEthernet0/0/0]INT G 0/0/1
[R5-GigabitEthernet0/0/1]IP ADD 172.16.1.17 30
[R5-LoopBack0]IP ADD 5.5.5.5 32
[R5-LoopBack0]INT L1
[R5-LoopBack1]IP ADD 172.16.5.5 24
[R6]INT G 0/0/0
[R6-GigabitEthernet0/0/0]IP ADD 172.16.1.18 30
[R6-GigabitEthernet0/0/0]INT G 0/0/1
[R6-GigabitEthernet0/0/1]IP ADD 172.16.1.13 30
[R6-GigabitEthernet0/0/1]INT L0
[R6-LoopBack0]IP ADD 6.6.6.6 32
[R6-LoopBack0]INT L1
[R6-LoopBack1]IP ADD 172.16.6.6 24
[R7]INT G 0/0/0
[R7-GigabitEthernet0/0/0]IP ADD 172.16.1.14 30
[R7-GigabitEthernet0/0/0]INT G 0/0/1
[R7-GigabitEthernet0/0/1]IP ADD 172.106.1.10 30
[R7-GigabitEthernet0/0/1]INT G 0/0/2
[R7-GigabitEthernet0/0/2]IP ADD 34.1.1.7 24
[R7-GigabitEthernet0/0/2]INT L0
[R7-LoopBack0]IP ADD 7.7.7.7 32
[R7-LoopBack0]INT L1
[R7-LoopBack1]IP ADD 172.16.7.7 24
[R8]INT G 0/0/0
[R8-GigabitEthernet0/0/0]IP ADD 34.1.1.8 24
[R8-GigabitEthernet0/0/0]INT L0
[R8-LoopBack0]IP ADD 8.8.8.8 32
[R8-LoopBack0]INT L1
[R8-LoopBack1]IP ADD 192.168.2.8 24

2.OSPF配置(AS 2内部) 

[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]A 0
[R2-ospf-1-area-0.0.0.0]NET 172.16.1.1 0.0.0.0
[R2-ospf-1-area-0.0.0.0]NET 172.16.1.21 0.0.0.0
[R2-ospf-1-area-0.0.0.0]NET 2.2.2.2 0.0.0.0
[R3]OSPF 1 router-id 3.3.3.3
[R3-ospf-1]A 0
[R3-ospf-1-area-0.0.0.0]NET 172.16.1.2 0.0.0.0
[R3-ospf-1-area-0.0.0.0]NET 172.16.1.5 0.0.0.0
[R3-ospf-1-area-0.0.0.0]NET 3.3.3.3 0.0.0.0
[R3-ospf-1-area-0.0.0.0]NET 172.16.3.0 0.0.0.255
[R4]OSPF 1 router-id 4.4.4.4
[R4-ospf-1]A  0
[R4-ospf-1-area-0.0.0.0]NET 172.16.1.6 0.0.0.0
[R4-ospf-1-area-0.0.0.0]NET 172.16.1.9 0.0.0.0
[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 172.16.4.0 0.0.0.255
[R5]OSPF 1 router-id 5.5.5.5
[R5-ospf-1]A 0
[R5-ospf-1-area-0.0.0.0]NET 5.5.5.5 0.0.0.0
[R5-ospf-1-area-0.0.0.0]NET 172.16.1.22 0.0.0.0
[R5-ospf-1-area-0.0.0.0]NET 172.16.1.17 0.0.0.0
[R5-ospf-1-area-0.0.0.0]NET 172.16.5.0 0.0.0.255
[R6]OSPF 1 router-id 6.6.6.6
[R6-ospf-1]A 0
[R6-ospf-1-area-0.0.0.0]NET 6.6.6.6 0.0.0.0
[R6-ospf-1-area-0.0.0.0]NET 172.16.6.0 0.0.0.255
[R6-ospf-1-area-0.0.0.0]NET 172.16.1.18 0.0.0.0
[R6-ospf-1-area-0.0.0.0]NET 172.16.1.13 0.0.0.0
[R7]OSPF 1 router-id 7.7.7.7
[R7-ospf-1]A 0
[R7-ospf-1-area-0.0.0.0]NET 7.7.7.7 0.0.0.0
[R7-ospf-1-area-0.0.0.0]NET 172.16.7.0 0.0.0.255
[R7-ospf-1-area-0.0.0.0]NET 172.16.1.14 0.0.0.0
[R7-ospf-1-area-0.0.0.0]NET 172.16.1.10 0.0.0.0

测试内网是否通

3.BGP配置

[R1]BGP 1
[R1-bgp]PEER 12.1.1.2 AS 2
[R2]BGP 64512
[R2-bgp]confederation ID 2
[R2-bgp]confederation peer-as 64513
[R2-bgp]PEER 12.1.1.1 AS 1
[R2-bgp]PEER 3.3.3.3 AS 64512
[R2-bgp]PEER 3.3.3.3 connect-interface L0
[R2-bgp]PEER 3.3.3.3 next-hop-invariable
[R2-bgp]PEER 3.3.3.3 next-hop-local
[R2-bgp]PEER 5.5.5.5 AS 64513
[R2-bgp]PEER 5.5.5.5 connect-interface L0
[R2-bgp]PEER 5.5.5.5 next-hop-local
[R2-bgp]PEER 5.5.5.5 ebgp-max-hop
[R3]BGP 64512
[R3-bgp]CON
[R3-bgp]confederation ID 2
[R3-bgp]PEER 2.2.2.2 AS 64512
[R3-bgp]PEER 2.2.2.2 connect-interface L0
[R3-bgp]PEER 4.4.4.4 AS 64512
[R3-bgp]PEER 4.4.4.4 connect-interface L0
[R3-bgp]PEER 2.2.2.2 reflect-client
[R3-bgp]PEER 4.4.4.4 reflect-client
[R4]BGP 64512
[R4-bgp]confederation ID 2
[R4-bgp]PEER 3.3.3.3 AS 64512
[R4-bgp]PEER 3.3.3.3 connect-interface L0
[R5]BGP 64513
[R5-bgp]confederation id 2
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 6.6.6.6 as 64513
[R5-bgp]peer 6.6.6.6 connect-interface l0
[R5-bgp]peer 6.6.6.6 next-hop-local
[R5-bgp]peer 2.2.2.2 as 64512
[R5-bgp]peer 2.2.2.2 connect-interface l0
[R5-bgp]peer 2.2.2.2 next-hop-local
[R5-bgp]peer 2.2.2.2 ebgp-max-hop
[R6]bgp 64513
[R6-bgp]confederation id 2
[R6-bgp]peer 5.5.5.5 as 64513
[R6-bgp]peer 5.5.5.5 connect-interface l0
[R6-bgp]peer 7.7.7.7 as 64513
[R6-bgp]peer 7.7.7.7 connect-interface l0
[R6-bgp]peer 5.5.5.5 reflect-client
[R6-bgp]peer 7.7.7.7 reflect-client
[R7]BGP 64513
[R7-bgp]confederation ID 2
[R7-bgp]PEER 6.6.6.6 AS 64513
[R7-bgp]PEER 6.6.6.6 connect-interface L0
[R7-bgp]PEER 6.6.6.6 next-hop-local
[R7-bgp]PEER 34.1.1.8 AS 3
[R8]BGP 3
[R8-bgp]PEER 34.1.1.7 AS 2

4.BGP路由宣告

[R2-bgp]NET 2.2.2.2 32
[R3-bgp]NET 3.3.3.3 32
[R3-bgp]NET 172.16.3.0 24
[R4-bgp]NET 4.4.4.4 32
[R4-bgp]NET 172.16.4.0 24
[R5-bgp]NET 5.5.5.5 32
[R5-bgp]NET 172.16.5.0 24
[R6-bgp]NET 6.6.6.6 32
[R6-bgp]NET 172.16.6.0 24
[R7-bgp]NET 7.7.7.7 32
[R7-bgp]NET 172.16.7.0 24
[R8-bgp]NET 8.8.8.8 32

5.GRE隧道配置

[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]ip add 10.1.1.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre
[R1-Tunnel0/0/0]source 10.1.1.1
[R1-Tunnel0/0/0]description 11.1.1.11
[R1]ip route-static 192.168.2.0 24 10.0.0.8
[R8]int Tunnel 0/0/0
[R8-Tunnel0/0/0]ip add 10.1.1.8 24
[R8-Tunnel0/0/0]tunnel-protocol gre
[R8-Tunnel0/0/0]sou
[R8-Tunnel0/0/0]source 11.1.1.11
[R8-Tunnel0/0/0]description 10.1.1.1
[R1]ip route-static 192.168.1.0 24 10.0.0.1

测试

posted @ 2025-08-11 19:45  yjbjingcha  阅读(6)  评论(0)    收藏  举报