华为AR2220 配置BGP与IGP交互

一、组网需求

1、如图所示，用户将网络划分为AS65008和AS65009，在AS65009内，使用IGP协议来计算路由（该例使用OSPF做为IGP协议）。要求实现两个AS之间的互相通信。

2、网络拓扑

3、配置思路

采用如下的思路配置BGP与IGP交互：
在RouterB和RouterC上配置OSPF协议，使RouterB和RouterC之间可以互访。
在RouterA和RouterB上配置EBGP连接，使RouterA和RouterB之间可以通过BGP相互传递路由。
在RouterB上配置BGP与OSPF互相引入，实现两个AS之间的互相通信。
（可选）在RouterB上配置BGP路由聚合，可以简化BGP路由表规模。

二、操作步骤

1、配置各接口IP地址

<Huawei>system-view
[Huawei]sysname RouterA
[RouterA]interface  GigabitEthernet  0/0/0
[RouterA-GigabitEthernet0/0/0]ip address  8.1.1.254 24
[RouterA-GigabitEthernet0/0/0]q
[RouterA]interface  GigabitEthernet  0/0/1
[RouterA-GigabitEthernet0/0/1]ip address  3.1.1.2 24
[RouterA-GigabitEthernet0/0/1]q

<Huawei>system-view 
[Huawei]sysname RouterB
[RouterB]interface  GigabitEthernet  0/0/1
[RouterB-GigabitEthernet0/0/1]ip address  3.1.1.1 24
[RouterB-GigabitEthernet0/0/1]q
[RouterB]interface  GigabitEthernet  0/0/2
[RouterB-GigabitEthernet0/0/2]ip address  9.1.1.1 24
[RouterB-GigabitEthernet0/0/2]q

<Huawei>system-view 
[Huawei]sysname RouterC
[RouterC]interface  GigabitEthernet  0/0/2
[RouterC-GigabitEthernet0/0/2]ip address  9.1.1.2 24
[RouterC-GigabitEthernet0/0/2]q
[RouterC]interface  GigabitEthernet  0/0/0
[RouterC-GigabitEthernet0/0/0]ip address  9.1.2.254 24
[RouterC-GigabitEthernet0/0/0]q

2、配置AS65009的OSPF

[RouterB]ospf 1 router-id 2.2.2.2
[RouterB-ospf-1]area 0
[RouterB-ospf-1-area-0.0.0.0]network  9.1.1.0 0.0.0.255
[RouterB-ospf-1-area-0.0.0.0]q
[RouterB-ospf-1]q

[RouterC]ospf 1 router-id 3.3.3.3
[RouterC-ospf-1]area 0
[RouterC-ospf-1-area-0.0.0.0]network  9.1.1.0 0.0.0.255
[RouterC-ospf-1-area-0.0.0.0]network  9.1.2.0 0.0.0.255
[RouterC-ospf-1-area-0.0.0.0]q
[RouterC-ospf-1]q

3、配置EBGP连接

[RouterA]bgp 65008
[RouterA-bgp]router-id 1.1.1.1
[RouterA-bgp]peer 3.1.1.1 as-number 65009
[RouterA-bgp]ipv4-family unicast 
[RouterA-bgp-af-ipv4]network 8.1.1.0 24
[RouterA-bgp-af-ipv4]q
[RouterA-bgp]q

[RouterB]bgp 65009
[RouterB-bgp]router-id 2.2.2.2
[RouterB-bgp]peer 3.1.1.2 as-number 65008
[RouterB-bgp]q

4、配置BGP和IGP交互，在RouterB上配置BGP引入OSPF路由，配置OSPF引入BGP路由

[RouterB]bgp 65009
[RouterB-bgp]ipv4-family unicast 
[RouterB-bgp-af-ipv4]import-route ospf 1
[RouterB-bgp-af-ipv4]q
[RouterB-bgp]q
查看RouterA是否学习到路由
[RouterA]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: 3
      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn

 *>   8.1.1.0/24         0.0.0.0         0                     0      i
 *>   9.1.1.0/24         3.1.1.1         0                     0      65009?
 *>   9.1.2.0/24         3.1.1.1         2                     0      65009?

[RouterB]ospf 1
[RouterB-ospf-1]import-route bgp 
[RouterB-ospf-1]q

5、RouterC查看路由表

[RouterC]display  ip routing-table 
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
         Destinations : 11       Routes : 11       

Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

        8.1.1.0/24  O_ASE   150  1           D   9.1.1.1         GigabitEthernet
0/0/2
        9.1.1.0/24  Direct  0    0           D   9.1.1.2         GigabitEthernet
0/0/2
        9.1.1.2/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
0/0/2
      9.1.1.255/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
0/0/2
        9.1.2.0/24  Direct  0    0           D   9.1.2.254       GigabitEthernet
0/0/0
      9.1.2.254/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
0/0/0
      9.1.2.255/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
0/0/0
      127.0.0.0/8   Direct  0    0           D   127.0.0.1       InLoopBack0
      127.0.0.1/32  Direct  0    0           D   127.0.0.1       InLoopBack0
127.255.255.255/32  Direct  0    0           D   127.0.0.1       InLoopBack0
255.255.255.255/32  Direct  0    0           D   127.0.0.1       InLoopBack0

6、配置路由自动聚合

[RouterB]bgp 65009
[RouterB-bgp]ipv4-family unicast 
[RouterB-bgp-af-ipv4]summary automatic 
[RouterB-bgp-af-ipv4]q

7、RouterA查看BGP路由表

[RouterA]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: 2
      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn

 *>   8.1.1.0/24         0.0.0.0         0                     0      i
 *>   9.0.0.0            3.1.1.1                               0      65009?

8、ping验证

[RouterA]ping -a 8.1.1.254 9.1.2.1
  PING 9.1.2.1: 56  data bytes, press CTRL_C to break
    Request time out
    Reply from 9.1.2.1: bytes=56 Sequence=2 ttl=126 time=30 ms
    Reply from 9.1.2.1: bytes=56 Sequence=3 ttl=126 time=30 ms
    Reply from 9.1.2.1: bytes=56 Sequence=4 ttl=126 time=20 ms
    Reply from 9.1.2.1: bytes=56 Sequence=5 ttl=126 time=30 ms

  --- 9.1.2.1 ping statistics ---
    5 packet(s) transmitted
    4 packet(s) received
    20.00% packet loss
    round-trip min/avg/max = 20/27/30 ms

华为AR2220 配置BGP与IGP交互

一、组网需求

二、操作步骤

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