HuaWei ❀ 配置基于前缀的BGP ORF

Posted 2022-08-02 无糖可乐没有灵魂

配置基于前缀的BGP ORF

如下图所示，R1和R2都属于AS 1，要求R2不必维护出口策略就可以实现R2设备只发送符合R1设备入口策略的路由；

配置接口IP地址：

[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip address 12.1.1.1 24
配置类似，不做阐述；

配置BGP：

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

[r2]bgp 1
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.1.1.1 as-number 1

配置R1基于前缀的入口过滤策略：

[r1]ip ip-prefix 1 permit 4.4.4.0 24 greater-equal 32
[r1]bgp 1
[r1-bgp]peer 12.1.1.2 ip-prefix 1 import 

配置R2上路由信息：

[r2]ip route-static 3.3.3.3 255.255.255.255 NULL 0
[r2]ip route-static 4.4.4.4 255.255.255.255 NULL 0
[r2]ip route-static 5.5.5.5 255.255.255.255 NULL 0
[r2]bgp 1
[r2-bgp]import-route static

查看配置结果：

[r2]display bgp routing-table

 BGP Local router ID is 2.2.2.2 
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete
 Total Number of Routes: 3
      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
 *>   3.3.3.3/32         0.0.0.0         0                     0      ?
 *>   4.4.4.4/32         0.0.0.0         0                     0      ?
 *>   5.5.5.5/32         0.0.0.0         0                     0      ?


[r1]display bgp routing-table

 BGP Local router ID is 1.1.1.1 
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete
 Total Number of Routes: 1
      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
 *>i  4.4.4.4/32         12.1.1.2        0          100        0      ?

查看R1路由接收情况：

[r1]display bgp routing-table peer 12.1.1.2 received-routes

查看R2路由发送情况：

[r2]display bgp routing-table peer 12.1.1.1 advertised-routes