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实际案例：欣联路由器网吧电信网通双线路接入解决方案
http://www.bitscn.com/wb/solution/200805/140040.html

原文：http://www.gz-benet.com.cn/study/HTML/study_393.html

巧设路由器 实现电信、网通南北互通

如何实现“访问网通站点走网通线路，访问电信站点走电信线路”呢？现在，我们以华为AR系列路由器为例，说明如何通过配置策略路由的方式满足以上需要。
   
    一：配置访问控制列表，定义访问目的地址为网通的地址段
   
    进入系统视图，创建ACL 3100：
    system
    System View: return to User View with Ctrl+Z.
    [Quidway]acl num 3100
    [Quidway-acl-adv-3100]
    可以直接复制粘贴如下规则：
    rule 0 permit ip destination 60.0.0.0 0.7.255.255
    rule 1 permit ip destination 60.0.0.0 0.8.255.255
    rule 2 permit ip destination 60.0.0.0 0.9.255.255
    rule 3 permit ip destination 60.0.0.0 0.10.255.255
    rule 4 permit ip destination 60.0.0.0 0.11.255.255
    rule 5 permit ip destination 60.8.0.0 0.3.255.255
    rule 6 permit ip destination 60.12.0.0 0.0.255.255
    rule 7 permit ip destination 60.13.0.0 0.0.63.255
    rule 8 permit ip destination 60.13.128.0 0.0.127.255
    rule 9 permit ip destination 60.16.0.0 0.15.255.255
    rule 10 permit ip destination 60.208.0.0 0.7.255.255
    rule 11 permit ip destination 60.216.0.0 0.1.255.255
    rule 12 permit ip destination 60.220.0.0 0.3.255.255
    rule 13 permit ip destination 61.48.0.0 0.3.255.255
    rule 14 permit ip destination 61.52.0.0 0.1.255.255
    rule 15 permit ip destination 61.54.0.0 0.0.255.255
    rule 16 permit ip destination 61.55.0.0 0.0.255.255
    rule 17 permit ip destination 61.133.0.0 0.0.127.255
    rule 18 permit ip destination 61.134.64.0 0.0.63.255
    rule 19 permit ip destination 61.134.128.0 0.0.127.255
    rule 20 permit ip destination 61.135.0.0 0.0.255.255
    rule 21 permit ip destination 61.136.0.0 0.0.255.255
    rule 22 permit ip destination 61.138.0.0 0.0.127.255
    rule 23 permit ip destination 61.139.128.0 0.0.63.255
    rule 24 permit ip destination 61.148.0.0 0.0.255.255
    rule 25 permit ip destination 61.149.0.0 0.0.255.255
    rule 26 permit ip destination 61.156.0.0 0.0.255.255
    rule 27 permit ip destination 61.158.0.0 0.0.255.255
    rule 28 permit ip destination 61.159.0.0 0.0.63.255
    rule 29 permit ip destination 61.161.0.0 0.0.63.255
    rule 30 permit ip destination 61.161.128.0 0.0.127.255
    rule 31 permit ip destination 61.162.0.0 0.0.255.255
    rule 32 permit ip destination 61.163.0.0 0.0.255.255
    rule 33 permit ip destination 61.167.0.0 0.0.255.255
    rule 34 permit ip destination 61.168.0.0 0.0.255.255
    rule 35 permit ip destination 61.176.0.0 0.0.255.255
    rule 36 permit ip destination 61.179.0.0 0.0.255.255
    rule 37 permit ip destination 61.180.128.0 0.0.127.255
    rule 38 permit ip destination 61.181.0.0 0.0.255.255
    rule 39 permit ip destination 61.182.0.0 0.0.255.255
    rule 40 permit ip destination 61.189.0.0 0.0.127.255
    rule 41 permit ip destination 202.32.0.0 0.31.255.255
    rule 42 permit ip destination 202.96.64.0 0.0.31.255
    rule 43 permit ip destination 202.97.128.0 0.0.127.255
    rule 44 permit ip destination 202.98.0.0 0.0.31.255
    rule 45 permit ip destination 202.99.0.0 0.0.255.255
    rule 46 permit ip destination 202.102.128.0 0.0.63.255
    rule 47 permit ip destination 202.102.224.0 0.0.1.255
    rule 48 permit ip destination 202.106.0.0 0.0.255.255
    rule 49 permit ip destination 202.107.0.0 0.0.127.255
    rule 50 permit ip destination 202.108.0.0 0.0.255.255
    rule 51 permit ip destination 202.110.0.0 0.0.127.255
    rule 52 permit ip destination 202.110.192.0 0.0.63.255
    rule 53 permit ip destination 202.111.128.0 0.0.63.255
    rule 54 permit ip destination 210.51.0.0 0.0.255.255
    rule 55 permit ip destination 210.52.0.0 0.1.255.255
    rule 56 permit ip destination 218.4.0.0 0.3.255.255
    rule 57 permit ip destination 218.10.0.0 0.1.255.255
    rule 58 permit ip destination 218.21.128.0 0.0.127.255
    rule 59 permit ip destination 218.24.0.0 0.1.255.255
    rule 60 permit ip destination 218.26.0.0 0.0.255.255
    rule 61 permit ip destination 218.27.0.0 0.0.255.255
    rule 62 permit ip destination 218.28.0.0 0.1.255.255
    rule 63 permit ip destination 218.56.0.0 0.3.255.255
    rule 64 permit ip destination 218.60.0.0 0.1.255.255
    rule 65 permit ip destination 218.62.0.0 0.0.127.255
    rule 66 permit ip destination 218.67.128.0 0.0.127.255
    rule 67 permit ip destination 218.68.0.0 0.1.255.255
    rule 68 permit ip destination 219.141.128.0 0.0.127.255
    rule 69 permit ip destination 219.142.0.0 0.1.255.255
    rule 70 permit ip destination 219.154.0.0 0.1.255.255
    rule 71 permit ip destination 219.156.0.0 0.1.255.255
    rule 72 permit ip destination 219.158.0.0 0.0.255.255
    rule 73 permit ip destination 219.159.0.0 0.0.63.255
    rule 74 permit ip destination 221.0.0.0 0.3.255.255
    rule 75 permit ip destination 221.4.0.0 0.1.255.255
    rule 76 permit ip destination 221.6.0.0 0.0.255.255
    rule 77 permit ip destination 221.7.128.0 0.0.127.255
    rule 78 permit ip destination 221.8.0.0 0.1.255.255
    rule 79 permit ip destination 221.10.0.0 0.0.255.255
    rule 80 permit ip destination 221.11.0.0 0.0.127.255
    rule 81 permit ip destination 221.12.0.0 0.3.255.255
    rule 82 permit ip destination 221.12.0.0 0.0.127.255
    rule 83 permit ip destination 221.12.128.0 0.0.63.255
    rule 84 permit ip destination 221.192.0.0 0.3.255.255
    rule 85 permit ip destination 221.196.0.0 0.1.255.255
    rule 86 permit ip destination 221.199.0.0 0.0.31.255
    rule 87 permit ip destination 221.199.32.0 0.0.15.255
    rule 88 permit ip destination 221.199.128.0 0.0.63.255
    rule 89 permit ip destination 221.199.192.0 0.0.15.255
    rule 90 permit ip destination 221.200.0.0 0.3.255.255
    rule 91 permit ip destination 221.204.0.0 0.1.255.255
    rule 92 permit ip destination 221.207.0.0 0.0.63.255
    rule 93 permit ip destination 221.208.0.0 0.15.255.255
    rule 94 permit ip destination 222.128.0.0 0.3.255.255
    rule 95 permit ip destination 222.132.0.0 0.3.255.255
    rule 96 permit ip destination 222.136.0.0 0.7.255.255
    rule 97 permit ip destination 222.160.0.0 0.3.255.255
   
    注：以上规则已经包含大部分网通地址段，如有更新可以动态添加。
   
    二：定义策略路由指定访问网通地址段的数据报文下一跳为网通网关
   
    [Quidway]route-policy auto permit node 1
    %New sequence of this list
    [Quidway-route-policy]if-match acl 3100
    [Quidway-route-policy]apply ip-address next-hop 10.1.1.2
    [Quidway-route-policy]dis this
    #
    route-policy auto permit node 1
    if-match acl 3100
    apply ip-address next-hop 10.1.1.2
    #
    return
    [Quidway-route-policy]
   
    注：上面配置中以地址10.1.1.2为例作为网通网关地址，应用中可根据实际需要修改。
   
    三：在连接局域网接口下应用此策略路由
   
    [Quidway]int e3/0
    [Quidway-Ethernet3/0]dis this
    #
    interface Ethernet3/0
    ip address 192.168.1.1 255.255.255.0
    #
    return
    [Quidway-Ethernet3/0]ip policy route-policy auto
    [Quidway-Ethernet3/0]dis this
    #
    interface Ethernet3/0
    ip address 192.168.1.1 255.255.255.0
    ip policy route-policy auto
    #
    return
    [Quidway-Ethernet3/0]
   
    四：配置默认路由器经过电信网关
   
    ip route-static 0.0.0.0 0.0.0.0 20.1.1.2 preference 60
   
    注：上面配置中以地址20.1.1.2为例作为电信网关地址，应用中可根据实际需要修改。
   
    经过如上三个配置步骤后，路由器便能自动区分网通流量和电信流量，使访问网通站点走网通线路，访问电信站点走电信线路。并且当网通线路出问题后所有流量都会自动切换到电信线路上，使用户能够不间断访问网络。