实验要求及拓扑如下
![](https://file.jishuzhan.net/article/1792136507960594434/caa2d5f03a5adb819ea04142aff18f52.webp)
1.子网划分
AS2基于172.16.0.0/16进行网段划分
划分出掩码为30的网段分给R2-R7作为PC,划分出掩码为24的网段作为AS2内部路由器之间的链路网段
172.16.0.0/30
172.16.0.4/30
172.16.0.8/30
172.16.0.12/30
172.16.0.16/30
172.16.0.20/30
172.16.1.0/24---23链路
172.16.2.0/24---34链路
172.16.3.0/24---56链路
172.16.4.0/24---67链路
172.16.5.0/24---25链路
172.16.6.0/24---47链路
R1---L0---192.168.1.0/24
L1---10.1.1.0/24
R8---L0---192.168.2.0/24
L1---11.1.1.0/24
2.配置过程
(1)IP配置
R1
R2
![](https://file.jishuzhan.net/article/1792136507960594434/3579fb5563a1a7b5680fac9c696a3168.webp)
R3
![](https://file.jishuzhan.net/article/1792136507960594434/ffa92ec03254455e5a7b29d8d0346fc3.webp)
R4
![](https://file.jishuzhan.net/article/1792136507960594434/9dc3b22632ebce2d02d78f978d3fa2de.webp)
R5
![](https://file.jishuzhan.net/article/1792136507960594434/43bd514defa059a3ce34ea85cd6082d2.webp)
R6
![](https://file.jishuzhan.net/article/1792136507960594434/d5ce5cbce1175c5d6c7c1a15661fae65.webp)
R7
![](https://file.jishuzhan.net/article/1792136507960594434/128d99503774f4a165f111a76291a8dc.webp)
R8
![](https://file.jishuzhan.net/article/1792136507960594434/48d7ace75fd1fc98c188bad176398e2d.webp)
(2)搭建AS2内部IGP环境(通过OSPF)
R2
![](https://file.jishuzhan.net/article/1792136507960594434/297efdf5bd7c9cbafd6e48c5db83e5b6.webp)
R3
![](https://file.jishuzhan.net/article/1792136507960594434/d58124becd9cfcee9ab7d367debf5992.webp)
R4
![](https://file.jishuzhan.net/article/1792136507960594434/4a4e1cd46f950b106813ad6dd987c6d9.webp)
R5
![](https://file.jishuzhan.net/article/1792136507960594434/2255ccfbd16e88eaf7653e42cf83ba2f.webp)
R6
![](https://file.jishuzhan.net/article/1792136507960594434/ed2b715b103ccd89770486a44ef9948e.webp)
R7
![](https://file.jishuzhan.net/article/1792136507960594434/105bd72a625417501a47f1b643ddb9b4.webp)
检查OSPF是否搭建完成:通过查看每台路由器的OSPF邻居表
![](https://file.jishuzhan.net/article/1792136507960594434/43fd9835aa868617c3740915bf125c97.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/ffe2531d4eb31f5f37dc02dd2fb79187.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/70eb3b45fb17f866312d85629b64a21e.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/49f79a00d4089e3030c773fe5f7f9119.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/77feb1bf32b863f2fd5a0078306cecb8.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/69bd78df1dc1d2ec54383c01b748b565.webp)
(3)R1上搭建AS1并与R2建立对等体关系
![](https://file.jishuzhan.net/article/1792136507960594434/e854c094290ced8e6ef88a4d79073ace.webp)
(4)R8上搭建AS3并与R7建立对等体关系
![](https://file.jishuzhan.net/article/1792136507960594434/6c4d6f8b64689856315d54f5b107fe5d.webp)
(5)搭建AS2内部的联邦AS
![](https://file.jishuzhan.net/article/1792136507960594434/fe70cf9119b6ed3660ddeaa2977b0777.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/b47119a736d658b56944971e76375429.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/4a109c9e302b7f22c870ea1cdc83d23a.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/ec51ec01000abcce47deb952dfb74e94.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/d877e9c2f29062a152dcdcfcfe5985ad.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/d5f26495e27e6af2d66e2e2349f510e7.webp)
检查BGP对等体是否建立成功,即查看路由器上的BGP邻居表
![](https://file.jishuzhan.net/article/1792136507960594434/9653c4c34e8e9b52bae5bf44c48d71cc.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/b0684f46bfe2a9b634dff7bb67c74e6e.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/2c5f7115b2f16b96f2f8f6a230b7a946.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/14e3bb802bc98c6349eee771bc014256.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/308a09938e95cf0ee9a91ce2078f50f5.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/d6fe50da13bf81aa03caba3d17096be6.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/3462b646075b5d9de4b01b1b9dacce63.webp)
![](https://file.jishuzhan.net/article/1792136507960594434/5ef90b2ce358a66b04f9689e6b003a69.webp)
(6)R1和R8之间建立GRE环境实现不能宣告的环回互通
![](https://file.jishuzhan.net/article/1792136507960594434/488fc81095b9429929104f26cfc24a3b.webp)
3.结果证明
证明R1,R8不能宣告的环回能够互通
![](https://file.jishuzhan.net/article/1792136507960594434/9ae8d03b19a6e1963d565ae1f8f4459c.webp)