实验练习:

SE 2014 年4月21日(二)-LMLPHP
如图配置:

两BGP自治系统,要求建立相关BGP邻居关系
1. 建立BGP邻居关系
要求使用BGP对等体组完成(IBGP要求使用loopback接口作为TCP建立的源接口)
2. R3 R4 R5 分别起源两BGP路由信息(保证BGP路由互通)
3. AS 65002中不能够存在 172网络的5网段,可以存在192网络的5网段(但起源属性为incomeplete
4. AS 65001中不能存在
起源于 AS 65002中172网络的路由,其他路由正常学习

步骤:

1、  完成基本的配置

2、  AS 65002完成OSPF单区域的配置

[RT1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0

[RT1-ospf-1-area-0.0.0.0]network 10.1.12.1 0.0.0.0

[RT1-ospf-1-area-0.0.0.0]network 10.1.15.1 0.0.0.0

[RT2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0

[RT2-ospf-1-area-0.0.0.0]network 10.1.12.2 0.0.0.0

[RT2-ospf-1-area-0.0.0.0]network 10.1.25.2 0.0.0.0

[RT2-ospf-1-area-0.0.0.0]network 10.1.23.1 0.0.0.0

[RT5-ospf-1-area-0.0.0.0]network 5.5.5.5 0.0.0.0

[RT5-ospf-1-area-0.0.0.0]network 10.1.15.2 0.0.0.0

[RT3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0

[RT3-ospf-1-area-0.0.0.0]network 10.1.23.2 0.0.0.0

3、  完成BGP对等体关系配置

[RT4-bgp]group ex external

[RT4-bgp]peer 10.1.14.2 group ex as-number 65002

[RT1-bgp]group ex external

[RT1-bgp]group in internal

[RT1-bgp]peer 10.1.14.1 group ex as-number 65001

[RT1-bgp]peer 2.2.2.2 group in as 65002

[RT1-bgp]peer 5.5.5.5 group in as 65002

[RT1-bgp]peer 3.3.3.3 group in as 65002

[RT1-bgp]peer in connect-interface LoopBack 1

[RT2-bgp]group in internal

[RT2-bgp]peer 1.1.1.1 group in as 65002

[RT2-bgp]peer 5.5.5.5 group in as 65002

[RT2-bgp]peer 3.3.3.3 group in as 65002

[RT2-bgp]peer in connect-interface LoopBack 1

[RT5-bgp]peer 1.1.1.1 group in as 65002

[RT5-bgp]peer 2.2.2.2 group in as 65002

[RT5-bgp]peer in connect-interface LoopBack 1

[RT3-bgp]group in 
internal

[RT3-bgp]peer 2.2.2.2 group in as 65002

[RT3-bgp]peer 5.5.5.5 group in as 65002

[RT3-bgp]peer 1.1.1.1 group in as 65002

[RT3-bgp]peer in connect-interface LoopBack 1

4、  注入BGP业务流

[RT4-bgp]network 172.16.4.100 32

[RT4-bgp]network 192.168.4.100 32

[RT5-bgp]network 172.16.5.100 32

[RT5-bgp]network 192.168.5.100 32

[RT3-bgp]network 172.16.3.100 32

[RT3-bgp]network 192.168.3.100 32

[RT1-bgp]peer in next-hop-local

5、  过滤172的网段,并修改192的5网段的源属

[RT5]ip ip-prefix filter_a permit 172.168.5.100 32

[RT5]ip ip-prefix filter_b permit 192.168.5.100 32

[RT5]route-policy filter_a deny node 10

[RT5-route-policy]if-match ip-prefix filter_a

[RT5]route-policy filter_a permit node 20

[RT5-route-policy]if-match ip-prefix filter_b

[RT5-route-policy]apply origin incomplete

[RT5]route-policy filter_a permit node 30

[RT5-bgp]peer in route-policy filter_a export

6、  过滤AS65002发布的172网段的路由

[RT4-acl-basic-2000]rule deny source 172.16.0.0 0.0.255.255

[RT4-acl-basic-2000]rule permit

[RT4-bgp]peer ex filter-policy 2000 import

7、  测试

查看RT2的BGP路由表

SE 2014 年4月21日(二)-LMLPHP

查看RT4的IP 路由表的BGP路由条目

SE 2014 年4月21日(二)-LMLPHP

05-11 19:44