{"id":229,"date":"2025-04-12T17:33:00","date_gmt":"2025-04-12T08:33:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=229"},"modified":"2025-10-12T11:46:06","modified_gmt":"2025-10-12T02:46:06","slug":"ospf%ef%bc%88%e5%9f%ba%e6%9c%ac%e3%81%a8%e5%8b%95%e4%bd%9c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=229","title":{"rendered":"OSPF\uff08\u57fa\u672c\u3068\u52d5\u4f5c\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">IGP\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e2\u3064\u306e\u30bf\u30a4\u30d7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IGP\u306e\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u306f\u5927\u304d\u304f\u5206\u3051\u30662\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e00\u3064\u76ee\u306e<span class=\"swl-marker mark_yellow\">\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb<\/span><\/strong>\u306e\u4ee3\u8868\u4f8b\u3068\u3057\u3066\u306fOSPF\u3068IS-IS\u304c\u3042\u308a\u3001\u65e5\u672c\u306e\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u7279\u306bOSPF\u304c\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306bCisco\u72ec\u81ea\u306e\u65b9\u5f0f\u3068\u3057\u3066\u3001\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u578b\u3068\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u306e\u7279\u5fb4\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u300c\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u578b\uff08\u62e1\u5f35\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u578b\uff09\u300d\u3082\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3067\u3001<strong><span class=\"swl-marker mark_yellow\">\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u578b<\/span><\/strong>\u306e\u4ee3\u8868\u3067\u3042\u308bRIP\u306f\u6700\u5927\u30db\u30c3\u30d7\u6570\u304c15\u306b\u5236\u9650\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u306f\u5411\u304d\u307e\u305b\u3093\u3002\u307e\u305f\u3001VLSM\u306b\u975e\u5bfe\u5fdc\u3001\u53ce\u675f\u304c\u9045\u3044\u3068\u3044\u3063\u305f\u5f31\u70b9\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u305f\u306e\u304c\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u3067\u306f\u30db\u30c3\u30d7\u6570\u5236\u9650\u304c\u306a\u304f\u3001\u53ce\u675f\u3082\u901f\u3044\u305f\u3081\u3001\u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9069\u3057\u305f\u65b9\u5f0f\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u578b\u3067\u306f\u3001\u96a3\u63a5\u30eb\u30fc\u30bf\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u305d\u306e\u307e\u307e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u52a0\u3057\u3066\u3044\u304f\u5358\u7d14\u306a\u4ed5\u7d44\u307f\u3067\u3057\u305f\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u3067\u306f\u3088\u308a\u9ad8\u5ea6\u306a\u30d7\u30ed\u30bb\u30b9\u3092\u8e0f\u307f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3092\u4fef\u77b0\u3057\u3066\u6700\u77ed\u7d4c\u8def\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5177\u4f53\u7684\u306a\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2460 Hello\u30d1\u30b1\u30c3\u30c8\u306e\u3084\u308a\u53d6\u308a\u306b\u3088\u3063\u3066\u96a3\u63a5\u30eb\u30fc\u30bf\u3068\u30cd\u30a4\u30d0\u30fc\u95a2\u4fc2\u3092\u78ba\u7acb\u3057\u3001\u30cd\u30a4\u30d0\u30fc\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b<br>\u2461 \u30eb\u30fc\u30bf\u540c\u58eb\u3067LSA\uff08Link State Advertisement\uff09\u3092\u4ea4\u63db\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u60c5\u5831\u3092\u53ce\u96c6\u3059\u308b<br>\u2462 \u96c6\u3081\u305f\u60c5\u5831\u3092\u30c8\u30dd\u30ed\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u4fdd\u5b58\u3057\u3001\u305d\u3053\u304b\u3089\u30c8\u30dd\u30ed\u30b8\u30de\u30c3\u30d7\u3092\u4f5c\u6210\u3059\u308b<br>\u2463 SPF\uff08Shortest Path First\uff09\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7528\u3044\u3066SPF\u30c4\u30ea\u30fc\u3092\u4f5c\u6210\u3059\u308b<br>\u2464 SPF\u30c4\u30ea\u30fc\u3092\u3082\u3068\u306b\u6700\u77ed\u7d4c\u8def\u3092\u7b97\u51fa\u3057\u3001\u305d\u306e\u60c5\u5831\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u767b\u9332\u3059\u308b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3068\u304d\u53ce\u96c6\u3055\u308c\u305fLSA\u306b\u306f\u3001\u30eb\u30fc\u30bf\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u60c5\u5831\u3084\u30ea\u30f3\u30af\u72b6\u614b\u306b\u95a2\u3059\u308b\u8a73\u7d30\u304c\u542b\u307e\u308c\u307e\u3059\u3002OSPF\u306b\u304a\u3044\u3066\u3001\u3053\u306e\u30c8\u30dd\u30ed\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u300cLSDB\uff08Link State Database\uff09\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u578b\u3067\u306f\u4e00\u5b9a\u9593\u9694\u3054\u3068\u306b\u5168\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u66f4\u65b0\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u3067\u306f30\u5206\u3054\u3068\u306bLSA\u5358\u4f4d\u3067\u306e\u540c\u671f\u3092\u884c\u3046\u305f\u3081\u3001\u8ca0\u8377\u304c\u5c11\u306a\u304f\u52b9\u7387\u7684\u3067\u3059\u3002\u307e\u305f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5909\u66f4\u304c\u3042\u3063\u305f\u5834\u5408\u306b\u306f\u300c\u30c8\u30ea\u30ac\u30fc\u30c9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u300d\u306b\u3088\u3063\u3066\u5373\u6642\u306b\u66f4\u65b0\u304c\u4f1d\u9054\u3055\u308c\u3001\u5909\u66f4\u90e8\u5206\u3060\u3051\u3092\u5dee\u5206\u3067\u901a\u77e5\u3059\u308b\u305f\u3081\u5e2f\u57df\u306e\u7bc0\u7d04\u306b\u3082\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OSPF\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">OSPF\uff08Open Shortest Path First\uff09<\/span><\/strong>\u306f\u3001\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4ee3\u8868\u683c\u3067\u3042\u308a\u3001\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u6700\u3082\u4e00\u822c\u7684\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u540d\u524d\u306e\u901a\u308a\u300c\u6700\u77ed\u7d4c\u8def\u512a\u5148\u300d\u3092\u57fa\u672c\u3068\u3057\u3001SPF\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7528\u3044\u3066\u6700\u9069\u306a\u7d4c\u8def\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u306e\u5927\u304d\u306a\u7279\u5fb4\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u300c\u30a8\u30ea\u30a2\u300d\u3068\u3044\u3046\u5358\u4f4d\u306b\u5206\u5272\u3067\u304d\u308b\u70b9\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3082\u52b9\u7387\u3088\u304f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u7ba1\u7406\u3067\u304d\u3001LSA\u306e\u6d41\u901a\u7bc4\u56f2\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u3067\u4e0d\u8981\u306a\u8ca0\u8377\u3092\u6291\u3048\u3089\u308c\u307e\u3059\u3002\u7279\u306b\u4e2d\u5fc3\u3068\u306a\u308b\u306e\u306f\u30a8\u30ea\u30a20\uff08\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u30a8\u30ea\u30a2\uff09\u3067\u3001\u3059\u3079\u3066\u306e\u30a8\u30ea\u30a2\u306f\u3053\u306e\u30a8\u30ea\u30a2\u3092\u7d4c\u7531\u3057\u3066\u63a5\u7d9a\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u306b\u306f\u3001IPv4\u5bfe\u5fdc\u306e OSPFv2\u3068IPv6\u5bfe\u5fdc\u306e OSPFv3\u306e2\u7a2e\u985e\u3042\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u7684\u306b\u306f\u524d\u8005\u306eOSPFv2\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001OSPF\u306fRIP\u306e\u3088\u3046\u306b\u5358\u7d14\u306a\u30db\u30c3\u30d7\u6570\u3067\u306f\u306a\u304f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5e2f\u57df\u5e45\u3092\u57fa\u6e96\u306b\u300c\u30b3\u30b9\u30c8\u300d\u3068\u3044\u3046\u30e1\u30c8\u30ea\u30c3\u30af\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u3088\u308a\u6027\u80fd\u306e\u9ad8\u3044\u56de\u7dda\u3092\u512a\u5148\u3057\u3066\u4f7f\u7528\u3067\u304d\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cOSPF\u306f\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u300d\u300c\u30a8\u30ea\u30a2\u5206\u5272\u304c\u3067\u304d\u308b\u300d\u300c\u30e1\u30c8\u30ea\u30c3\u30af\u306f\u30b3\u30b9\u30c8\u300d\u300c\u6700\u77ed\u7d4c\u8def\u8a08\u7b97\u306b\u306fSPF\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3059\u308b\u300d\u3068\u3044\u3063\u305f\u70b9\u304c\u3088\u304f\u554f\u308f\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hello\u30d1\u30b1\u30c3\u30c8\u306b\u3088\u308b\u30cd\u30a4\u30d0\u30fc\u95a2\u4fc2\u306e\u78ba\u7acb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u3067\u306f\u3001\u307e\u305a\u96a3\u63a5\u3059\u308b\u30eb\u30fc\u30bf\u540c\u58eb\u304c\u300c\u81ea\u5206\u306f\u3053\u3053\u306b\u3044\u308b\u3088\u300d\u3068\u3044\u3046\u6328\u62f6\u306e\u3088\u3046\u306a\u610f\u5473\u3067Hello\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308a\u5408\u3044\u307e\u3059\u3002\u3053\u306e\u30d1\u30b1\u30c3\u30c8\u306f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9224.0.0.5\u5b9b\u306b\u9001\u4fe1\u3055\u308c\u3001\u53d7\u4fe1\u3057\u305f\u30eb\u30fc\u30bf\u306f\u76f8\u624b\u3092\u30cd\u30a4\u30d0\u30fc\u3068\u3057\u3066\u8a8d\u8b58\u3057\u307e\u3059\u3002\u8a8d\u8b58\u3055\u308c\u305f\u30cd\u30a4\u30d0\u30fc\u306f\u30cd\u30a4\u30d0\u30fc\u30c6\u30fc\u30d6\u30eb\u306b\u767b\u9332\u3055\u308c\u3001\u305d\u306e\u5f8c\u3082\u5b9a\u671f\u7684\u306bHello\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308a\u5408\u3046\u3053\u3068\u3067\u300c\u76f8\u624b\u304c\u307e\u3060\u751f\u304d\u3066\u3044\u308b\u304b\u300d\u3092\u78ba\u8a8d\u3057\u7d9a\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u306f\u3001\u307e\u308b\u3067\u53cb\u9054\u540c\u58eb\u304c\u300c\u5143\u6c17\uff1f\u300d\u3068\u6642\u3005\u9023\u7d61\u3092\u53d6\u308a\u5408\u3063\u3066\u3044\u308b\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u9023\u7d61\u304c\u9014\u7d76\u3048\u305f\u3089\u3001\u305d\u306e\u30eb\u30fc\u30bf\u306f\u30c0\u30a6\u30f3\u3057\u305f\u3068\u5224\u65ad\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cHello\u30d1\u30b1\u30c3\u30c8\u306f224.0.0.5\u306b\u9001\u4fe1\u3055\u308c\u308b\u300d\u3068\u3044\u3046\u70b9\u304c\u983b\u51fa\u3067\u3059\u306e\u3067\u3001\u5fc5\u305a\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">LSA\u4ea4\u63db \u21d2 LSDB\u69cb\u7bc9 \u21d2 \u30c8\u30dd\u30ed\u30b8\u30de\u30c3\u30d7\u4f5c\u6210<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30cd\u30a4\u30d0\u30fc\u95a2\u4fc2\u304c\u78ba\u7acb\u3059\u308b\u3068\u3001\u6b21\u306f\u30eb\u30fc\u30bf\u540c\u58eb\u3067\u30ea\u30f3\u30af\u60c5\u5831\u3092\u3084\u308a\u53d6\u308a\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u81ea\u8eab\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u60c5\u5831\u3084\u63a5\u7d9a\u72b6\u6cc1\u3092\u300cLSA\uff08Link State Advertisement\uff09\u300d\u3068\u3044\u3046\u5f62\u3067\u96a3\u306e\u30eb\u30fc\u30bf\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u53d7\u3051\u53d6\u3063\u305fLSA\u306f\u30c8\u30dd\u30ed\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u3001\u3055\u3089\u306b\u5225\u306e\u30eb\u30fc\u30bf\u306b\u3082\u4f1d\u9054\u3055\u308c\u308b\u305f\u3081\u3001\u6700\u7d42\u7684\u306b\u306f\u30a8\u30ea\u30a2\u5185\u306e\u3059\u3079\u3066\u306e\u30eb\u30fc\u30bf\u306b\u540c\u3058\u60c5\u5831\u304c\u5171\u6709\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u3067\u306f\u3001\u3053\u306e\u30c8\u30dd\u30ed\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u7279\u5225\u306b\u300cLSDB\uff08Link State Database\uff09\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u300c\u540c\u3058\u30a8\u30ea\u30a2\u5185\u306e\u5168\u30eb\u30fc\u30bf\u306f\u540c\u4e00\u306eLSDB\u3092\u4fdd\u6301\u3059\u308b\u300d\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u30a8\u30ea\u30a2\u3068\u306f\u3001LSA\u306e\u3084\u308a\u53d6\u308a\u3092\u884c\u3046\u7bc4\u56f2\u3092\u533a\u5207\u308b\u8ad6\u7406\u7684\u306a\u5358\u4f4d\u3067\u3042\u308a\u3001\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u52b9\u7387\u7684\u306b\u7ba1\u7406\u3059\u308b\u4ed5\u7d44\u307f\u306e\u3072\u3068\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LSDB\u306b\u683c\u7d0d\u3055\u308c\u305f\u60c5\u5831\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5404\u30eb\u30fc\u30bf\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u5730\u56f3\u3001\u3064\u307e\u308a\u300c\u30c8\u30dd\u30ed\u30b8\u30de\u30c3\u30d7\u300d\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u6bb5\u968e\u3067\u30eb\u30fc\u30bf\u306f\u81ea\u5206\u3092\u53d6\u308a\u5dfb\u304f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u59ff\u3092\u6b63\u3057\u304f\u628a\u63e1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SPF\u30c4\u30ea\u30fc\u306e\u4f5c\u6210 \u21d2 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c8\u30dd\u30ed\u30b8\u30de\u30c3\u30d7\u304c\u5b8c\u6210\u3057\u305f\u3089\u3001\u6b21\u306bSPF\uff08Shortest Path First\uff09\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3001\u901a\u79f0\u300c\u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u6cd5\u300d\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u3001\u5730\u56f3\u3092\u3082\u3068\u306b\u300c\u6700\u3082\u30b3\u30b9\u30c8\u306e\u4f4e\u3044\u7d4c\u8def\u306f\u3069\u3053\u304b\u300d\u3092\u8a08\u7b97\u3059\u308b\u3082\u306e\u3067\u3001\u7d50\u679c\u3068\u3057\u3066\u300cSPF\u30c4\u30ea\u30fc\u300d\u3068\u547c\u3070\u308c\u308b\u968e\u5c64\u69cb\u9020\u304c\u4f5c\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u306e\u30b3\u30b9\u30c8\u306f\u30ea\u30f3\u30af\u306e\u5e2f\u57df\u5e45\u304b\u3089\u7b97\u51fa\u3055\u308c\u3001\u5e2f\u57df\u5e45\u304c\u5e83\u3044\u30ea\u30f3\u30af\u307b\u3069\u30b3\u30b9\u30c8\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u307010Mbps\u306f\u30b3\u30b9\u30c810\u3001100Mbps\u306f\u30b3\u30b9\u30c81\u30011Gbps\u306f\u8a08\u7b97\u4e0a0.1\u3067\u3059\u304c\u3001\u6574\u6570\u5024\u306b\u5207\u308a\u4e0a\u3052\u30661\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u9ad8\u901f\u56de\u7dda\u304c\u512a\u5148\u7684\u306b\u9078\u3070\u308c\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3068\u3048\u3070R1\u304b\u3089\u300c192.168.3.0\/24\u300d\u306b\u884c\u304f\u5834\u5408\u3001R1\u304b\u3089R2\u307e\u3067\u306e\u30b3\u30b9\u30c8\u304c1\u3001R2\u304b\u3089R3\u307e\u3067\u304c1\u3001R3\u304b\u3089\u76ee\u7684\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u307e\u3067\u304c1\u306a\u3089\u3001\u5408\u8a08\u30b3\u30b9\u30c8\u306f3\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001\u3082\u3057\u5225\u7d4c\u8def\u304c\u3042\u308a\u3001\u305d\u306e\u5408\u8a08\u30b3\u30b9\u30c8\u304c12\u3067\u3042\u308c\u3070\u3001OSPF\u306f\u81ea\u52d5\u7684\u306b\u30b3\u30b9\u30c83\u306e\u7d4c\u8def\u3092\u9078\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u91cd\u8981\u306a\u306e\u306f\u3001\u540c\u3058\u5b9b\u5148\u3078\u306e\u7d4c\u8def\u30b3\u30b9\u30c8\u304c\u7b49\u3057\u3044\u5834\u5408\u3001OSPF\u306f\u300c\u7b49\u30b3\u30b9\u30c8\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u300d\u3092\u884c\u3046\u3053\u3068\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u8907\u6570\u306e\u7d4c\u8def\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u767b\u9332\u3057\u3001\u5b9b\u5148\u3078\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u8907\u6570\u306e\u30eb\u30fc\u30c8\u306b\u5206\u6563\u3055\u305b\u307e\u3059\u3002\u3053\u308c\u306f\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306e\u52b9\u7387\u7684\u306a\u5e2f\u57df\u5229\u7528\u306b\u3064\u306a\u304c\u308b\u5927\u5207\u306a\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cSPF\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u6cd5\u300d\u300c\u30b3\u30b9\u30c8\u306f\u5e2f\u57df\u5e45\u3092\u57fa\u6e96\u306b\u7b97\u51fa\u300d\u300c\u7b49\u30b3\u30b9\u30c8\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u3092\u30b5\u30dd\u30fc\u30c8\u300d\u3068\u3044\u3063\u305f\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OSPF &#8211; \u30c8\u30dd\u30ed\u30b8\u5909\u66f4\u306e\u52d5\u4f5c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u306b\u5909\u5316\u304c\u8d77\u304d\u305f\u3068\u304d\u306b\u300c\u5dee\u5206\u306e\u307f\u300d\u3092\u3059\u3070\u3084\u304f\u5468\u56f2\u306b\u77e5\u3089\u305b\u308b\u4ed5\u7d44\u307f\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u300c\u30c8\u30ea\u30ac\u30fc\u30c9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u3042\u308b\u30eb\u30fc\u30bf\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u30c0\u30a6\u30f3\u3057\u305f\u5834\u5408\u3001\u305d\u306e\u30eb\u30fc\u30bf\u306f\u3059\u3050\u306b\u65b0\u3057\u3044\u60c5\u5831\u3092LSA\u306b\u53cd\u6620\u3057\u3001\u96a3\u63a5\u30eb\u30fc\u30bf\u306b\u901a\u77e5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u8a18\u306f\u3001R1\u306eFastEthernet0\/0\u304c\u30c0\u30a6\u30f3\u3057\u305f\u5834\u5408\u306e\u6d41\u308c\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9805\u756a<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u2460<\/td><td>R1\u306eFa0\/0\u30ea\u30f3\u30af\u304c\u30c0\u30a6\u30f3\u3057\u3001\u63a5\u7d9a\u3057\u3066\u3044\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08192.168.0.0\/24\uff09\u304c\u4f7f\u3048\u306a\u304f\u306a\u308b\u3002<\/td><\/tr><tr><td>\u2461<\/td><td>R1\u306f\u81ea\u8eab\u306eLSA\u3092\u4fee\u6b63\u3057\u3001LSDB\u3092\u66f4\u65b0\u3059\u308b\u3002<\/td><\/tr><tr><td>\u2462<\/td><td>SPF\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u518d\u5b9f\u884c\u3057\u3001SPF\u30c4\u30ea\u30fc\u3092\u66f4\u65b0\u3002\u305d\u306e\u7d50\u679c\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u8a72\u5f53\u3059\u308b\u7d4c\u8def\u304c\u524a\u9664\u3055\u308c\u308b\u3002<\/td><\/tr><tr><td>\u2463<\/td><td>R1\u306f\u66f4\u65b0\u3057\u305fLSA\u3092\u96a3\u63a5\u30eb\u30fc\u30bf\u306b\u30c8\u30ea\u30ac\u30fc\u30c9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u901a\u77e5\u3059\u308b\u3002<\/td><\/tr><tr><td>\u2464<\/td><td>R2\u306f\u53d7\u4fe1\u3057\u305fLSA\u304c\u65b0\u3057\u3044\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001LSDB\u3092\u66f4\u65b0\u3059\u308b\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u2464\u4ee5\u964d\u3001R2\u3082\u540c\u69d8\u306bSPF\u3092\u518d\u8a08\u7b97\u3057\u3066\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u66f4\u65b0\u3057\u3001\u305d\u306eLSA\u3092\u3055\u3089\u306b\u4ed6\u306e\u30eb\u30fc\u30bf\u306b\u901a\u77e5\u3057\u307e\u3059\u3002\u3053\u306e\u4e00\u9023\u306e\u51e6\u7406\u306f\u30a8\u30ea\u30a2\u5185\u306e\u3059\u3079\u3066\u306eOSPF\u30eb\u30fc\u30bf\u3067\u9023\u9396\u7684\u306b\u884c\u308f\u308c\u3001\u6700\u7d42\u7684\u306b\u5168\u30eb\u30fc\u30bf\u304c\u540c\u3058LSDB\u3092\u6301\u3064\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u306e\u304a\u304b\u3052\u3067\u3001OSPF\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u969c\u5bb3\u6642\u306b\u9ad8\u901f\u3067\u53ce\u675f\u3057\u3001\u5927\u898f\u6a21\u306a\u74b0\u5883\u3067\u3082\u5b89\u5b9a\u3057\u305f\u901a\u4fe1\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cOSPF\u306f\u30c8\u30dd\u30ed\u30b8\u5909\u5316\u6642\u306b\u5dee\u5206\u306e\u307f\u3092\u30c8\u30ea\u30ac\u30fc\u30c9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u901a\u77e5\u3059\u308b\u300d\u3068\u3044\u3046\u8868\u73fe\u304c\u3088\u304f\u554f\u308f\u308c\u307e\u3059\u306e\u3067\u5fc5\u305a\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OSPF\u306e\u7279\u5fb4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">OSPF\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u3082\u306e\u3092\u4ee5\u4e0b\u306b\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9805\u756a<\/th><th>\u7279\u5fb4<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u2460<\/td><td>\u30de\u30eb\u30c1\u30d9\u30f3\u30c0\u30fc\u5bfe\u5fdc<\/td><td>IETF\u6a19\u6e96\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u305f\u3081\u3001\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u30eb\u30fc\u30bf\u540c\u58eb\u3067\u3082\u76f8\u4e92\u63a5\u7d9a\u304c\u53ef\u80fd\u3002<\/td><\/tr><tr><td>\u2461<\/td><td>\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b<\/td><td>RIP\u306e\u3088\u3046\u306a\u30c7\u30a3\u30b9\u30bf\u30f3\u30b9\u30d9\u30af\u30bf\u3067\u306f\u306a\u304f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3092\u628a\u63e1\u3059\u308b\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u3002<\/td><\/tr><tr><td>\u2462<\/td><td>\u9ad8\u901f\u306a\u30b3\u30f3\u30d0\u30fc\u30b8\u30a7\u30f3\u30b9<\/td><td>\u30c8\u30dd\u30ed\u30b8\u5909\u5316\u6642\u306b\u3059\u3050\u306b\u518d\u8a08\u7b97\u3055\u308c\u3001\u53ce\u675f\u304c\u901f\u3044\u3002<\/td><\/tr><tr><td>\u2463<\/td><td>\u30b3\u30b9\u30c8\u3092\u30e1\u30c8\u30ea\u30c3\u30af\u306b\u4f7f\u7528<\/td><td>\u5e2f\u57df\u5e45\u3092\u57fa\u6e96\u306b\u8a08\u7b97\u3055\u308c\u308b\u300c\u30b3\u30b9\u30c8\u300d\u3067\u7d4c\u8def\u9078\u629e\u3092\u884c\u3046\u3002<\/td><\/tr><tr><td>\u2464<\/td><td>VLSM\u5bfe\u5fdc<\/td><td>\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3092\u542b\u3081\u3066\u901a\u77e5\u3067\u304d\u308b\u305f\u3081\u3001\u30af\u30e9\u30b9\u30ec\u30b9\u30a2\u30c9\u30ec\u30b9\u8a2d\u8a08\u306b\u5bfe\u5fdc\u3002<\/td><\/tr><tr><td>\u2465<\/td><td>\u7d4c\u8def\u96c6\u7d04\u306e\u30b5\u30dd\u30fc\u30c8<\/td><td>ABR\u3084ASBR\u3067\u624b\u52d5\u306b\u3088\u308b\u7d4c\u8def\u96c6\u7d04\u304c\u53ef\u80fd\u3002\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9069\u3057\u3066\u3044\u308b\u3002<\/td><\/tr><tr><td>\u2466<\/td><td>\u30a8\u30ea\u30a2\u8a2d\u8a08\u304c\u53ef\u80fd<\/td><td>\u30a8\u30ea\u30a2\u3068\u3044\u3046\u8ad6\u7406\u7684\u306a\u5358\u4f4d\u3092\u4f7f\u3063\u3066\u968e\u5c64\u7684\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u5206\u5272\u3067\u304d\u308b\u3002<\/td><\/tr><tr><td>\u2467<\/td><td>\u5dee\u5206\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/td><td>\u5b9a\u671f\u7684\u306b\u5168\u60c5\u5831\u3092\u6d41\u3059\u306e\u3067\u306f\u306a\u304f\u3001\u30c8\u30dd\u30ed\u30b8\u5909\u66f4\u6642\u306e\u307f\u5dee\u5206\u3092\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u3067\u901a\u77e5\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p 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