路由过滤-BGP进程下过滤

一、网络拓扑

（注意：没有配OSPF）

二、各设备配置

R1：

#
 sysname R1
#
interface GigabitEthernet0/0/0
 ip address 10.0.12.1 255.255.255.0 
#
interface LoopBack10
 ip address 192.168.10.1 255.255.255.255 
#
interface LoopBack20
 ip address 192.168.20.1 255.255.255.255 
#
interface LoopBack30
 ip address 192.168.30.1 255.255.255.255 
#
interface LoopBack40
 ip address 192.168.40.1 255.255.255.255 
#
bgp 100
 router-id 1.1.1.1
 peer 10.0.12.2 as-number 200 
 #
 ipv4-family unicast
  undo synchronization
  filter-policy ip-prefix admin export 
  network 192.168.10.1 255.255.255.255 
  network 192.168.20.1 255.255.255.255 
  network 192.168.30.1 255.255.255.255 
  network 192.168.40.1 255.255.255.255 
  peer 10.0.12.2 enable
#
ip ip-prefix admin index 10 deny 192.168.10.1 32
ip ip-prefix admin index 20 permit 0.0.0.0 0 less-equal 32
#
 

R2：

#
 sysname R2
#
interface GigabitEthernet0/0/0
 ip address 10.0.12.2 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 10.0.23.2 255.255.255.0 
#
interface LoopBack0
 ip address 2.2.2.2 255.255.255.255 
#
bgp 200
 router-id 2.2.2.2
 peer 10.0.12.1 as-number 100 
 peer 10.0.23.3 as-number 300 
 #
 ipv4-family unicast
  undo synchronization
  peer 10.0.12.1 enable
  peer 10.0.23.3 enable
#
R3：

#
 sysname R3
#
interface GigabitEthernet0/0/0
 ip address 10.0.23.3 255.255.255.0 
#
interface LoopBack0
 ip address 3.3.3.3 255.255.255.255 
#
bgp 300
 router-id 3.3.3.3
 peer 10.0.23.2 as-number 200 
 #
 ipv4-family unicast
  undo synchronization
  import-route static
  peer 10.0.23.2 enable
#
ip route-static 172.16.10.0 255.255.255.0 NULL0
ip route-static 172.16.20.0 255.255.255.0 NULL0
#
 

三、过滤前后

过滤前：

过滤后：

四、主要配置