{"id":3764,"date":"2025-06-13T11:22:14","date_gmt":"2025-06-13T03:22:14","guid":{"rendered":"https:\/\/www.key-iot.com\/?p=3764"},"modified":"2025-06-13T11:23:28","modified_gmt":"2025-06-13T03:23:28","slug":"cant-plan-ip-addresses-as-a-network-engineer-thats-embarrassing","status":"publish","type":"post","link":"https:\/\/www.key-iot.com\/jp\/blog\/cant-plan-ip-addresses-as-a-network-engineer-thats-embarrassing\/","title":{"rendered":"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u3057\u3066IP\u30a2\u30c9\u30ec\u30b9\u3092\u8a08\u753b\u3067\u304d\u306a\u3044\uff1f\u305d\u308c\u306f\u6065\u305a\u304b\u3057\u3044"},"content":{"rendered":"
\"ae9fd27604b3ad66a72a7638636de0e8\"<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u4ed5\u4e8b\u306b\u5c31\u304f\u591a\u304f\u306e\u4eba\u304c\u6700\u521d\u306b\u51fa\u4f1a\u3046\u306e\u306f\u3001\u30b9\u30a4\u30c3\u30c1\u306e\u5c0e\u5165\u3067\u3082\u30eb\u30fc\u30bf\u30fc\u306e\u8a2d\u5b9a\u3067\u3082\u306a\u304f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u3067\u3042\u308b\u3002\u4e0d\u601d\u8b70\u306a\u3053\u3068\u306b\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u30d5\u30a9\u30fc\u30e9\u30e0\u3067\u3082\u3001\u300cIP\u30a2\u30c9\u30ec\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u5272\u308a\u5f53\u3066\u308b\u304b\u300d\u3068\u3044\u3046\u554f\u984c\u306b\u76f4\u9762\u3059\u308b\u3068\u3001\u6570\u3048\u5207\u308c\u306a\u3044\u307b\u3069\u306e\u4eba\u3005\u304c\u6df7\u4e71\u3059\u308b\u3002\u7279\u306b\u76e3\u8996\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3084\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u643a\u308f\u308b\u4eba\u3005\u306f\u3001\u30de\u30eb\u30c1\u30c7\u30d0\u30a4\u30b9\u3084\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u6271\u3046\u3068\u304d\u306b\u9014\u65b9\u306b\u66ae\u308c\u308b\u3002<\/div>\n

 <\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u57fa\u672c\u7684\u306a\u30b9\u30ad\u30eb\u3067\u3042\u308b\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u3044\u304b\u306b\u5408\u7406\u7684\u306b\u8a08\u753b\u3059\u308b\u304b\u306b\u7126\u70b9\u3092\u5f53\u3066\u308b\u3002<\/div>\n

\u306a\u305cIP\u30a2\u30c9\u30ec\u30b9\u8a08\u753b\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h2>\n
\u57fa\u672c\u7684\u306a\u30ed\u30b8\u30c3\u30af\u304b\u3089\u59cb\u3081\u3088\u3046\uff1a<\/div>\n

 <\/p>\n

    \n
  • \u7121\u7406\u306aIP\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0 \u2192 IP\u30b3\u30f3\u30d5\u30ea\u30af\u30c8\uff0b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6df7\u4e71\uff0b\u60aa\u5922\u306e\u3088\u3046\u306a\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9<\/li>\n
  • \u660e\u78ba\u306aIP\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0\u2192\u4e00\u76ee\u3067\u308f\u304b\u308b\u554f\u984c\u70b9\uff0b\u7c21\u5358\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff0b\u624b\u9593\u306e\u304b\u304b\u3089\u306a\u3044\u62e1\u5f35\u6027<\/li>\n<\/ul>\n

     <\/p>\n

    192.168.1.X\u3092\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u6570\u767e\u53f0\u306e\u76e3\u8996\u30ab\u30e1\u30e9\u3001\u8907\u6570\u30d3\u30eb\u306e\u8a2d\u5099\u3001\u30ad\u30e3\u30f3\u30d1\u30b9\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306a\u3069\u306e\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001IP\u8a08\u753b\u304c\u4e0d\u5341\u5206\u3060\u3068\u3059\u3050\u306b\u5f8c\u6094\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/div>\n

    \u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3300\u306e\u76e3\u8996\u30dd\u30a4\u30f3\u30c8\u306bIP\u3092\u5272\u308a\u5f53\u3066\u308b\u306b\u306f\uff1f<\/h2>\n
    \u5de5\u5834\u306e\u76e3\u8996\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f8b\u306b\u3068\u3063\u3066\u307f\u3088\u3046\uff1a<\/div>\n

     <\/p>\n

      \n
    • \u5408\u8a08300\u53f0\u306e\u30ab\u30e1\u30e9<\/li>\n
    • 4\u3064\u306e\u30be\u30fc\u30f3\u306b\u5206\u304b\u308c\u3066\u3044\u308b\uff1a\n
        \n
      • \u30be\u30fc\u30f3A\uff1a\u30ab\u30e1\u30e970\u53f0<\/li>\n
      • \u30be\u30fc\u30f3B\uff1a\u30ab\u30e1\u30e970\u53f0<\/li>\n
      • \u30be\u30fc\u30f3C\uff1a\u30ab\u30e1\u30e980\u53f0<\/li>\n
      • \u30be\u30fc\u30f3D\uff1a\u30ab\u30e1\u30e980\u53f0<\/li>\n<\/ul>\n<\/li>\n
      • \u8981\u4ef6\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u30c8\u30e9\u30f3\u30af\u3068\u30be\u30fc\u30f3\u30b9\u30a4\u30c3\u30c1\u3067\u63a5\u7d9a\u3055\u308c\u305f\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u3059\u3079\u3066\u306e\u6a5f\u5668\u3002<\/li>\n<\/ul>\n

         <\/p>\n

        IP\u5272\u308a\u5f53\u3066\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u306f2\u3064\u306e\u4e3b\u6d41\u304c\u3042\u308b\uff1a<\/div>\n

        \u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f31\uff1aVLAN\u306a\u3057\u30011\u3064\u306e\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8<\/h3>\n
        \u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u30b9\u30fc\u30d1\u30fc\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u914d\u7f6e\u3059\u308b\uff1a<\/div>\n

         <\/p>\n

          \n
        • \u30cd\u30c3\u30c8\u30ef\u30fc\u30af192.168.0.0\/23 (\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af 255.255.254.0)<\/li>\n
        • \u5229\u7528\u53ef\u80fd\u306aIP\uff1a192.168.0.1\uff5e192.168.1.254<\/li>\n
        • \u7dcf\u5229\u7528\u53ef\u80fd\u6570\uff1a510IP-300\u53f0\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u5341\u5206\u306a\u6570\u3067\u3059\u3002<\/li>\n<\/ul>\n

           <\/p>\n

          \u6b20\u70b9<\/strong>:<\/div>\n

           <\/p>\n

            \n
          • \u904e\u5270\u306a\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\uff1a\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u304c1\u3064\u306e\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30fb\u30c9\u30e1\u30a4\u30f3\u5185\u306b\u3042\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30b9\u30c8\u30fc\u30e0\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u3002<\/li>\n
          • \u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u96e3\u3057\u3044\uff1aIP\u3068\u30be\u30fc\u30f3\u306e\u660e\u78ba\u306a\u30de\u30c3\u30d4\u30f3\u30b0\u304c\u306a\u3044\u3002<\/li>\n
          • \u62e1\u5f35\u6027\u304c\u4f4e\u3044\uff1a\u30c7\u30d0\u30a4\u30b9\u306e\u8ffd\u52a0\u6642\u306bIP\u304c\u7af6\u5408\u3057\u3084\u3059\u3044\u3002<\/li>\n<\/ul>\n

             <\/p>\n

            \u30b7\u30f3\u30d7\u30eb\u3060\u304c\u3001\u8907\u96d1\u3067\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u306f\u304a\u52e7\u3081\u3067\u304d\u306a\u3044\u3002<\/div>\n

            \u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f32\uff1a\u30bb\u30b0\u30e1\u30f3\u30c8\u5316\u3055\u308c\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff0bVLAN\u3001\u72ec\u7acb\u3057\u305f\u30be\u30fc\u30f3<\/h3>\n
            \u63a8\u5968\u3055\u308c\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u30b3\u30a2\u30fb\u30b9\u30a4\u30c3\u30c1\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306eVLAN\u3092\u4f5c\u6210\u3057\u3001\u5404\u30be\u30fc\u30f3\u306b\u72ec\u81ea\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u3002<\/div>\n

             <\/p>\n

              \n
            • \u5404\u30be\u30fc\u30f3\u306f\u6700\u5927254\u306eIP\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u73fe\u5728\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u30ab\u30d0\u30fc\u3057\u3001\u62e1\u5f35\u306e\u4f59\u5730\u3082\u3042\u308b\u3002<\/li>\n<\/ul>\n

               <\/p>\n

              \u30e1\u30ea\u30c3\u30c8<\/strong>:<\/div>\n

               <\/p>\n

                \n
              • IP\u30bb\u30b0\u30e1\u30f3\u30c8\u3067\u30be\u30fc\u30f3\u304c\u4e00\u76ee\u77ad\u7136\u3002<\/li>\n
              • \u30d0\u30c3\u30c1Ping\u306f\u3001\u30aa\u30d5\u30e9\u30a4\u30f3\u30c7\u30d0\u30a4\u30b9\u3092\u8fc5\u901f\u306b\u691c\u7d22\u3057\u307e\u3059\u3002<\/li>\n
              • IP\u306e\u7af6\u5408\u3092\u9632\u3050\u3002<\/li>\n
              • \u9577\u671f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u7c21\u7d20\u5316<\/li>\n<\/ul>\n

                 <\/p>\n

                \u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u67d4\u8edf\u6027\u3068\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u5316\u306e\u305f\u3081\u306b\u3001192.168.X.0\/23\u307e\u305f\u306f\u3088\u308a\u5927\u304d\u306a\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30bb\u30b0\u30e1\u30f3\u30c8\uff0810.X.X.X\u306a\u3069\uff09\u3092\u4f7f\u7528\u3059\u308b\u3002<\/div>\n

                IP\u30a2\u30c9\u30ec\u30b9\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0\u306e\u305f\u3081\u306e\u666e\u904d\u7684\u306a\u30d2\u30f3\u30c8<\/h2>\n
                \u3053\u3053\u3067\u306f\u5b9f\u8df5\u7684\u306a\u516c\u5f0f\u3092\u7d39\u4ecb\u3057\u3088\u3046\uff1a<\/div>\n

                1.\u7269\u7406\u7684\u30be\u30fc\u30f3\u306b\u3088\u308b\u5272\u308a\u5f53\u3066<\/h3>\n
                  \n
                • \u30aa\u30d5\u30a3\u30b9\u30d3\u30eb\u30d5\u30ed\u30a2\u5225<\/li>\n
                • \u5de5\u696d\u56e3\u5730\uff1a\u6a5f\u80fd\u5206\u91ce\u5225<\/li>\n
                • \u30ab\u30e1\u30e9\u5efa\u7269\u5225\u3001\u6a5f\u80fd\u5225<\/li>\n<\/ul>\n

                   <\/p>\n

                  \u5b66\u6821\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4f8b\uff1a<\/div>\n

                   <\/p>\n

                    \n
                  • \u6559\u80b2\u68df1\uff1a192.168.10.0\/24<\/li>\n
                  • \u7b2c2\u6821\u820e\uff1a192.168.11.0\/24<\/li>\n
                  • \u5beeA\uff1a192.168.20.0\/24<\/li>\n
                  • \u5beeB\uff1a192.168.21.0\/24<\/li>\n<\/ul>\n

                    2.\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30a2\u30c9\u30ec\u30b9\u306e\u6a19\u6e96\u5316<\/h3>\n
                    \u6163\u4f8b\u3092\u63a1\u7528\u3059\u308b\u3002\u00a0.1<\/code>\u00a0\u3092\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\uff08\u4f8b\uff1a192.168.10.1\uff09\u3068\u3057\u3066\u899a\u3048\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002<\/div>\n

                    3.\u4e88\u5099IP\u30d7\u30fc\u30eb\u3092\u4e88\u7d04\u3059\u308b<\/h3>\n
                    \u30e6\u30fc\u30b6\u30fcIP\u3092\u5272\u308a\u5f53\u3066\uff08\u4f8b\uff1a1-120\uff09\u3001121-254\u3092\u5c06\u6765\u306e\u30c7\u30d0\u30a4\u30b9\u7528\u306b\u78ba\u4fdd\u3059\u308b\u3002<\/div>\n

                    4.\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/h3>\n
                    IP\u5272\u308a\u5f53\u3066\u8868\u3092\u7ba1\u7406\u3059\u308b-\u6c7a\u3057\u3066\u30e1\u30e2\u30ea\u3060\u3051\u306b\u983c\u3089\u306a\u3044\u3053\u3068\u3002\u6700\u4f4e\u9650\u3001Excel\u30b7\u30fc\u30c8\u306e\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\uff1a
                    | \u30c7\u30d0\u30a4\u30b9\u306e\u7a2e\u985e\uff5c\u30be\u30fc\u30f3\uff5cIP\u30a2\u30c9\u30ec\u30b9\uff5cMAC\u30a2\u30c9\u30ec\u30b9\uff5c\u76ee\u7684<\/div>\n

                    \u6700\u7d42\u7684\u306a\u611f\u60f3<\/h2>\n
                    IP\u30a2\u30c9\u30ec\u30b9\u306e\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0\u306f\u5358\u7d14\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u304c\u3001\u305d\u306e\u91cd\u8981\u6027\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u898f\u6a21\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u3069\u9ad8\u307e\u308b\u3002\u8a08\u753b\u304c\u4e0d\u5341\u5206\u3060\u3068\u52b4\u50cd\u8005\u306b\u306a\u308a\u3001\u826f\u3044\u8a08\u753b\u3092\u7acb\u3066\u308b\u3068\u5efa\u7bc9\u5bb6\u306b\u306a\u308b\u3002<\/div>\n

                     <\/p>\n

                    \u5c0f\u3055\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u3001\u6a19\u6e96\u5316\u3055\u308c\u305f\u30d7\u30e9\u30f3\u30cb\u30f3\u30b0\u306e\u7fd2\u6163\u3092\u8eab\u306b\u3064\u3051\u308b\u3002\u30db\u30fc\u30e0\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3059\u308b\u3068\u304d\u3067\u3082\u3001\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u3092192.168.1.1-254\u306b\u6368\u3066\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002\u4eca\u65e5\u8eab\u306b\u3064\u3051\u305f\u30b9\u30ad\u30eb\u306f\u3001\u660e\u65e5\u306e\u30ad\u30e3\u30ea\u30a2\u30a2\u30c3\u30d7\u306b\u3064\u306a\u304c\u308b\u3002<\/div>","protected":false},"excerpt":{"rendered":"

                    Many people entering the network engineering profession first encounter not switch deployment or router configuration, but IP address allocation. Strangely, whether in projects or forums, countless people get confused when facing the question of “how to allocate IP addresses”\u2014especially those working on surveillance or enterprise networks, who are at a loss when dealing with multi-device and large network segments.   This article focuses on the basic skill of network engineers: how to reasonably plan IP addresses. Why is IP Address Planning Important? Let’s start with a basic logic:   Unreasonable IP planning \u2192 IP conflicts + network chaos + nightmarish maintenance Clear IP planning \u2192 issues identifiable at a glance […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3764","post","type-post","status-publish","format-standard","hentry","category-blog"],"metadata":{"classic-editor-remember":["classic-editor"],"_edit_lock":["1749794481:1"],"_edit_last":["1"],"themepark_seo_title":["Can't Plan IP Addresses as a Network Engineer? That's Embarrassing"],"themepark_seo_description":["whether in projects or forums, countless people get confused when facing the question of \"how to allocate IP addresses\"\u2014especially those working on surveillance or enterprise networks, who are at a loss when dealing with multi-device and large network segments."],"themepark_seo_keyword":["Plan IP Addresses"],"catce":["sidebar-widgets4"],"_yoast_wpseo_primary_category":["16"],"_yoast_wpseo_metadesc":["whether in projects or forums, countless people get confused when facing the question of \"how to allocate IP addresses\"\u2014especially those working on surveillance or enterprise networks, who are at a loss when dealing with multi-device and large network segments."],"_yoast_wpseo_content_score":["60"],"_yoast_wpseo_estimated-reading-time-minutes":["3"],"views":["5645"],"_wpml_word_count":["632"]},"yoast_head":"\nCan't Plan IP Addresses as a Network Engineer? That's Embarrassing - KEY-IOT<\/title>\n<meta name=\"description\" content=\"whether in projects or forums, countless people get confused when facing the question of "how to allocate IP addresses"\u2014especially those working on surveillance or enterprise networks, who are at a loss when dealing with multi-device and large network segments.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.key-iot.com\/jp\/blog\/cant-plan-ip-addresses-as-a-network-engineer-thats-embarrassing\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can't Plan IP Addresses as a Network Engineer? 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