华为 Router配置BGP的基本功能

布满荆棘的人生 2022-05-22 07:46 229阅读 0赞

一、组网需求

1、如图所示，需要在所有Router间运行BGP协议，RouterA、RouterB之间建立EBGP连接，RouterB、RouterC和RouterD之间建立IBGP全连接。

2、网络拓扑

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3、配置思路

在RouterB、RouterC和RouterD间配置IBGP连接。  
在RouterA和RouterB之间配置EBGP连接。

## 二、操作步骤 ##

1、配置Router接口IP

<Huawei>system-view 
    [Huawei]sysname RouterA
    [RouterA]interface  GigabitEthernet  0/0/1
    [RouterA-GigabitEthernet0/0/1]ip address  8.1.1.8 24
    [RouterA-GigabitEthernet0/0/1]q
    [RouterA]interface  GigabitEthernet  0/0/2
    [RouterA-GigabitEthernet0/0/2]ip address  200.1.1.2 24
    [RouterA-GigabitEthernet0/0/2]q
    
    <Huawei>system-view 
    [Huawei]sysname RouterB
    [RouterB]interface  GigabitEthernet  0/0/2
    [RouterB-GigabitEthernet0/0/2]ip address 200.1.1.1 24
    [RouterB-GigabitEthernet0/0/2]q
    [RouterB]interface  GigabitEthernet  0/0/1
    [RouterB-GigabitEthernet0/0/1]ip address  9.1.3.1 24
    [RouterB-GigabitEthernet0/0/1]q
    [RouterB]interface  GigabitEthernet  0/0/0
    [RouterB-GigabitEthernet0/0/0]ip address  9.1.1.1 24
    [RouterB-GigabitEthernet0/0/0]q
    
    <Huawei>system-view 
    [Huawei]sysname RouterC
    [RouterC]interface  GigabitEthernet  0/0/1
    [RouterC-GigabitEthernet0/0/1]ip address  9.1.3.2 24
    [RouterC-GigabitEthernet0/0/1]q
    [RouterC]interface  GigabitEthernet  0/0/2
    [RouterC-GigabitEthernet0/0/2]ip address  9.1.2.1 24
    [RouterC-GigabitEthernet0/0/2]q
    
    <Huawei>system-view 
    [Huawei]sysname RouterD
    [RouterD]interface  GigabitEthernet  0/0/2
    [RouterD-GigabitEthernet0/0/2]ip address  9.1.2.2 24
    [RouterD-GigabitEthernet0/0/2]q
    [RouterD]interface  GigabitEthernet  0/0/0
    [RouterD-GigabitEthernet0/0/0]ip address  9.1.1.2 24
    [RouterD-GigabitEthernet0/0/0]q

2、配置IBGP连接

[RouterB]bgp 65009
    [RouterB-bgp]router-id 2.2.2.2
    [RouterB-bgp]peer 9.1.1.2 as-number 65009
    [RouterB-bgp]peer 9.1.3.2 as-number 65009
    [RouterB-bgp]q
    
    [RouterC]bgp 65009
    [RouterC-bgp]router-id 3.3.3.3
    [RouterC-bgp]peer 9.1.3.1 as-number 65009
    [RouterC-bgp]peer 9.1.2.2 as-number 65009
    [RouterC-bgp]q
    
    [RouterD]bgp 65009
    [RouterD-bgp]router-id 4.4.4.4
    [RouterD-bgp]peer 9.1.1.1 as-number 65009
    [RouterD-bgp]peer 9.1.2.1 as-number 65009
    [RouterD-bgp]q

3、配置EBGP连接

[RouterA]bgp 65008
    [RouterA-bgp]router-id 1.1.1.1
    [RouterA-bgp]peer 200.1.1.1 as-number 65009
    [RouterA-bgp]q
    
    [RouterB]bgp 65009	
    [RouterB-bgp]peer 200.1.1.2 as-number 65008
    [RouterB-bgp]q

4、查看BGP对等体连接状态，看到全部已经建立

[RouterB]display  bgp  peer 
    
     BGP local router ID : 2.2.2.2
     Local AS number : 65009
     Total number of peers : 3		  Peers in established state : 3
    
      Peer            V          AS  MsgRcvd  MsgSent  OutQ  Up/Down       State Pre
    fRcv
    
      9.1.1.2         4       65009        6        7     0 00:04:53 Established    
       0
      9.1.3.2         4       65009        7        8     0 00:05:44 Established    
       0
      200.1.1.2       4       65008        2        3     0 00:00:12 Established    
       0
    [RouterB]

5、配置RouterA发布路由8.1.1.0/24

[RouterA]bgp  65008
    [RouterA-bgp]ipv4-family unicast 
    [RouterA-bgp-af-ipv4]network 8.1.1.0 255.255.255.0
    [RouterA-bgp-af-ipv4]q

6、查看RouterA、RouterB、RouterC路由表信息

[RouterA-bgp]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
     *>   8.1.1.0/24         0.0.0.0         0                     0      i
     
    [RouterB]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: 1
          Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
     *>   8.1.1.0/24         200.1.1.2       0                     0      65008i
     
    [RouterC]display  bgp  routing-table 
     BGP Local router ID is 3.3.3.3 
     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  8.1.1.0/24         200.1.1.2       0          100        0      65008i

从路由表可以看出，RouterC虽然学到了AS65008中的8.0.0.0的路由，但因为下一跳200.1.1.2不可达，所以不是有效路由。

7、配置BGP引入直连路由

[RouterB]bgp 65009
    [RouterB-bgp]ipv4-family unicast 
    [RouterB-bgp-af-ipv4]import-route direct 
    [RouterB-bgp-af-ipv4]q

8、测试

[RouterC]bgp 65009
    [RouterC-bgp]display  bgp routing-table 
    
     BGP Local router ID is 3.3.3.3 
     Status codes: * - valid, > - best, d - damped,
                   h - history,  i - internal, s - suppressed, S - Stale
                   Origin : i - IGP, e - EGP, ? - incomplete
    
    
     Total Number of Routes: 4
          Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
    
     *>i  8.1.1.0/24         200.1.1.2       0          100        0      65008i
     *>i  9.1.1.0/24         9.1.3.1         0          100        0      ?
       i  9.1.3.0/24         9.1.3.1         0          100        0      ?
     *>i  200.1.1.0          9.1.3.1         0          100        0      ?
    [RouterC-bgp]ping 8.1.1.8
      PING 8.1.1.8: 56  data bytes, press CTRL_C to break
        Reply from 8.1.1.8: bytes=56 Sequence=1 ttl=254 time=30 ms
        Reply from 8.1.1.8: bytes=56 Sequence=2 ttl=254 time=30 ms
        Reply from 8.1.1.8: bytes=56 Sequence=3 ttl=254 time=20 ms
        Reply from 8.1.1.8: bytes=56 Sequence=4 ttl=254 time=30 ms
        Reply from 8.1.1.8: bytes=56 Sequence=5 ttl=254 time=20 ms
    
      --- 8.1.1.8 ping statistics ---
        5 packet(s) transmitted
        5 packet(s) received
        0.00% packet loss
        round-trip min/avg/max = 20/26/30 ms

[70]: /images/20220522/3e2dba5c12da45619ed5684dc992ef72.png