求助, IP 地址段有什么批量拆分的办法么 - V2EX
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fengxing

求助, IP 地址段有什么批量拆分的办法么

  •  
  •   fengxing Dec 28, 2015 2846 views
    This topic created in 3773 days ago, the information mentioned may be changed or developed.
    想批量拆分 cidr 的 IP 段,发现网上查到的都是 cidr 合并,没有找到拆分,请问大家有没有什么的好的方法拆分 IP 段
    10 replies    2015-12-29 20:46:10 +08:00
    fetich
        1
    fetich  
       Dec 29, 2015
    路由器匹配时是最长匹配,把大块地址划成小块不就行了?
    fengxing
        2
    fengxing  
    OP
       Dec 29, 2015
    @fetich 批量啊,例如我需要把一大批的 /15 的 IP 段拆分成 /24 的,路由器还真完成不了这件事
    Showfom
        3
    Showfom  
    PRO
       Dec 29, 2015
    @fengxing 这个不是脑子里计算下就行了。。。。
    fengxing
        4
    fengxing  
    OP
       Dec 29, 2015
    @Showfom 批量啊...好几千行 IP 段,最小的是 /15 ,最大的是 /3 ,脑子计算............
    Showfom
        5
    Showfom  
    PRO
       Dec 29, 2015
    @fengxing 只见过 /8 没见过 /3 哪里冒出来的
    BOYPT
        6
    BOYPT  
       Dec 29, 2015
    用 cidr 库自己写吧
    fengxing
        7
    fengxing  
    OP
       Dec 29, 2015
    @Showfom 分配给美国的 IP 段最大是 /4 ,/3 是我自己整理全世界 IP 段,没见过不代表没有啊
    Showfom
        8
    Showfom  
    PRO
       Dec 29, 2015
    @fengxing 没有人会这么用啊,而且分配给美国的,又不是全部用的美国的。你说是分配给 Arin 的吧?

    https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks
    fengxing
        9
    fengxing  
    OP
       Dec 29, 2015
    @Showfom 15.0.0.0/4 就是分配给美国的
    Showfom
        10
    Showfom  
    PRO
       Dec 29, 2015
    @fengxing 15/8 和 16/8 是惠普的,谁会直接用 /4 啊
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