非直連BGP鄰居配置

案例：非直連BGP鄰居配置
問題

1）確保設備之間的連通性

2）配置BGP，指定鄰居

3）驗證
方案

使用eNSP搭建實驗環境，如圖-2所示。

實現此案例須要按照以下步驟進行。

//R1的基本配置
      interface gi0/0/0 
        ip address  192.168.12.1  255.255.255.0
    interface loopback 13
           ip address 10.10.1.1 255.255.255.0
    ospf 1 router-id 1.1.1.1
           area 0 
             network 192.168.12.0 0.0.0.255
             network 10.10.1.1 0.0.0.0  
    //R2的基本配置
      interface gi0/0/1 
        ip address  192.168.12.2  255.255.255.0
      interface gi0/0/0 
        ip address  192.168.23.2  255.255.255.0
    ospf 1 router-id 2.2.2.2
            area 0 
              network 192.168.12.0 0.0.0.255
    network 192.168.23.0 0.0.0.255
    //R3的基本配置
      interface gi0/0/1 
        ip address  192.168.23.3  255.255.255.0
    interface loopback 13
           ip address 10.10.3.3 255.255.255.0
    ospf 1 router-id 3.3.3.3
            area 0 
              network 192.168.23.0 0.0.0.255
              network 10.10.3.3 0.0.0.0
    //R1的配置
      bgp 64512
           router-id 1.1.1.1
           peer 10.10.3.3 as-number 64512
    //更改 R1 向 R3 發送 BGP 報文時所使用的源IP
           peer 10.10.3.3 connect-interface loopback 13
    //R3的配置
      bgp 64512
           router-id 3.3.3.3
           peer 10.10.1.1 as-number 64512
    //更改 R3 向 R1 發送 BGP 報文時所使用的源IP
           peer 10.10.1.1 connect-interface loopback 13                 
     //在R1上查看 BGP 的鄰居表
    display  bgp   peer
    BGP local router ID : 1.1.1.1
     Local AS number : 64512
     Total number of peers : 1          Peers in established state : 1
      Peer        V          AS  MsgRcvd  MsgSent  OutQ  Up/Down       State PrefRcv
      10.10.3.3   4       64512        3        5     0 00:01:37 Established   0
    //在R3上查看 BGP 的鄰居表
    display  bgp   peer
    BGP local router ID : 3.3.3.3
     Local AS number : 64512
     Total number of peers : 1          Peers in established state : 1
      Peer        V          AS  MsgRcvd  MsgSent  OutQ  Up/Down       State PrefRcv
      10.10.1.1   4       64512        5        5     0 00:03:57 Established   0

配置成功