{"id":1290,"date":"2025-10-10T03:58:57","date_gmt":"2025-10-09T18:58:57","guid":{"rendered":"https:\/\/mylifeisbeautiful555.net\/?page_id=1290"},"modified":"2025-10-10T03:58:57","modified_gmt":"2025-10-09T18:58:57","slug":"stp%e3%81%a8%e3%81%af","status":"publish","type":"page","link":"https:\/\/mylifeisbeautiful555.net\/?page_id=1290","title":{"rendered":"STP\u3068\u306f"},"content":{"rendered":"\n<p>STP\uff08Spanning Tree Protocol\uff09\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308b\u30eb\u30fc\u30d7\u3092\u9632\u6b62\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n<p>IEEE\u898f\u683c\u3067\u306f <strong>IEEE 802.1D<\/strong> \u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>STP\u306e\u76ee\u7684<br>\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30eb\u30fc\u30d7\u306e\u9632\u6b62<br>\u30fb\u5197\u9577\u7d4c\u8def\u306e\u7ba1\u7406<\/p>\n\n\n\n<p>STP\u304c\u306a\u3044\u5834\u5408<\/p>\n\n\n\n<p>\u30eb\u30fc\u30d7\u69cb\u6210\u3092\u53d6\u308b\u3068\u30d5\u30ec\u30fc\u30e0\u304c<strong>\u6c38\u9060\u306b\u56de\u308a\u7d9a\u3051\u3066\u3057\u307e\u3046<\/strong>\u3068\u3044\u3046\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"769\" height=\"440\" src=\"https:\/\/mylifeisbeautiful555.net\/wp-content\/uploads\/2025\/08\/image.png\" alt=\"\" class=\"wp-image-1304\" srcset=\"https:\/\/mylifeisbeautiful555.net\/wp-content\/uploads\/2025\/08\/image.png 769w, https:\/\/mylifeisbeautiful555.net\/wp-content\/uploads\/2025\/08\/image-300x172.png 300w\" sizes=\"auto, (max-width: 769px) 100vw, 769px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>PC-A\u304b\u3089\u9001\u4ed8\u3055\u308c\u305fARP\u306fPC-B\u306b\u5230\u7740\u3059\u308b\u304c\u3001<br>\u4ed6\u7d4c\u8def\u3092\u901a\u3058\u3066\u3001SW-A\u306b\u623b\u3063\u3066\u304d\u3066\u3057\u307e\u3046\u3082\u306e\u3082\u3042\u308a\u3001<br>\u66f4\u306b\u305d\u308c\u3092\u30d5\u30e9\u30c3\u30c7\u30a3\u30f3\u30b0\u3059\u308b\u305f\u3081\u3001\u30eb\u30fc\u30d7\u304c\u767a\u751f\u3059\u308b<br>\u3053\u308c\u3092<strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#cf2e2e\" class=\"has-inline-color\">\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30b9\u30c8\u30fc\u30e0<\/mark><\/strong>\u3068\u8a00\u3046<\/td><td>\u3053\u306e\u3088\u3046\u306b\u5197\u9577\u69cb\u6210\u3092\u4f5c\u308b\u3068\u3001\u3082\u3057STP\u304c\u306a\u3051\u308c\u3070\uff1a<br>\u30d5\u30ec\u30fc\u30e0\u304c\u7121\u9650\u306b\u56de\u308a\u7d9a\u3051\u308b<br>    MAC\u30a2\u30c9\u30ec\u30b9\u30c6\u30fc\u30d6\u30eb\u304c\u4e0d\u5b89\u5b9a\uff08\u4e0a\u66f8\u304d\u3055\u308c\u7d9a\u3051\u308b\uff09<br>    CPU\u8ca0\u8377\u4e0a\u6607\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u505c\u6b62<br>&#x27a1; <strong>STP\u306f\u3053\u306e\u30eb\u30fc\u30d7\u3092\u81ea\u52d5\u7684\u306b\u691c\u51fa\u30fb\u9632\u6b62<\/strong>\u3057\u307e\u3059\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td style=\"width:10px;border-color:#fff;background-color:#333\"><\/td><td style=\"font-size:24px;border-color:#fff #fff #333\">STP\u306e\u57fa\u672c\u52d5\u4f5c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>STP\u306f\u3001\u30b9\u30a4\u30c3\u30c1\u540c\u58eb\u3067\u300cBPDU\uff08Bridge Protocol Data Unit\uff09\u300d\u3068\u3044\u3046\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\u3092\u3084\u308a\u53d6\u308a\u3057\u3001<br>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067**1\u672c\u306e\u30c4\u30ea\u30fc\u69cb\u9020\uff08Spanning Tree\uff09**\u3092\u5f62\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25cf\u30b9\u30c6\u30c3\u30d71\uff1a\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\uff08Root Bridge\uff09\u306e\u9078\u51fa<\/h3>\n\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067\u3001<strong>\u6700\u3082\u512a\u5148\u5ea6\uff08Bridge ID\uff09\u304c\u4f4e\u3044\u30b9\u30a4\u30c3\u30c1<\/strong>\u3092<br>\u300c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\uff08Root Bridge\uff09\u300d\u3068\u3057\u3066\u9078\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>Bridge ID = \u512a\u5148\u5ea6\uff08Priority\uff09 + MAC\u30a2\u30c9\u30ec\u30b9<\/strong><\/p>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u512a\u5148\u5ea6\u306f <code>32768<\/code> \u3067\u3059\u3002<br>\uff08\u512a\u5148\u5ea6\u304c\u540c\u3058\u306a\u3089\u3001MAC\u30a2\u30c9\u30ec\u30b9\u304c\u5c0f\u3055\u3044\u65b9\u304c\u52dd\u3061\uff09<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25cf\u30b9\u30c6\u30c3\u30d72\uff1a\u5404\u30b9\u30a4\u30c3\u30c1\u304c\u7d4c\u8def\u30b3\u30b9\u30c8\u3092\u8a08\u7b97<\/h3>\n\n\n\n<p>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u307e\u3067\u306e**\u7d4c\u8def\u30b3\u30b9\u30c8\uff08Path Cost\uff09**\u3092\u8a08\u7b97\u3057\u3001<br>\u6700\u77ed\u7d4c\u8def\u3092\u9078\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30ea\u30f3\u30af\u901f\u5ea6<\/th><th>\u30b3\u30b9\u30c8\u5024\uff08IEEE\u63a8\u5968\uff09<\/th><\/tr><\/thead><tbody><tr><td>10 Mbps<\/td><td>100<\/td><\/tr><tr><td>100 Mbps<\/td><td>19<\/td><\/tr><tr><td>1 Gbps<\/td><td>4<\/td><\/tr><tr><td>10 Gbps<\/td><td>2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u25cf\u30b9\u30c6\u30c3\u30d73\uff1a\u30dd\u30fc\u30c8\u306e\u5f79\u5272\u3092\u6c7a\u5b9a<\/h3>\n\n\n\n<p>\u5404\u30b9\u30a4\u30c3\u30c1\u306e\u30dd\u30fc\u30c8\u306b\u306f\u3001STP\u306b\u3088\u3063\u3066\u6b21\u306e\u5f79\u5272\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30dd\u30fc\u30c8\u5f79\u5272<\/th><th>\u610f\u5473<\/th><\/tr><\/thead><tbody><tr><td><strong>Root Port (RP)<\/strong><\/td><td>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3078\u6700\u77ed\u7d4c\u8def\u306e\u30dd\u30fc\u30c8\uff08\u5404\u30b9\u30a4\u30c3\u30c1\u306b1\u3064\uff09<\/td><\/tr><tr><td><strong>Designated Port (DP)<\/strong><\/td><td>\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u3067\u30d5\u30ec\u30fc\u30e0\u8ee2\u9001\u3092\u62c5\u5f53\u3059\u308b\u30dd\u30fc\u30c8<\/td><\/tr><tr><td><strong>Non-Designated Port (Blocking)<\/strong><\/td><td>\u30eb\u30fc\u30d7\u9632\u6b62\u306e\u305f\u3081\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u30dd\u30fc\u30c8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30c6\u30c3\u30d74\uff1a\u30dd\u30fc\u30c8\u72b6\u614b\u9077\u79fb<\/h3>\n\n\n\n<p>STP\u30dd\u30fc\u30c8\u306f\u3001\u4ee5\u4e0b\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u52d5\u4f5c\u72b6\u614b\u3092\u5909\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>Blocking \u2192 Listening \u2192 Learning \u2192 Forwarding<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u72b6\u614b<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td><strong>Blocking<\/strong><\/td><td>\u30d5\u30ec\u30fc\u30e0\u8ee2\u9001\u305b\u305a\u3001BPDU\u3060\u3051\u53d7\u4fe1<\/td><\/tr><tr><td><strong>Listening<\/strong><\/td><td>STP\u60c5\u5831\u3092\u51e6\u7406\u3001MAC\u5b66\u7fd2\u306f\u307e\u3060\u884c\u308f\u306a\u3044<\/td><\/tr><tr><td><strong>Learning<\/strong><\/td><td>MAC\u30a2\u30c9\u30ec\u30b9\u3092\u5b66\u7fd2\u3059\u308b\u304c\u8ee2\u9001\u306f\u3057\u306a\u3044<\/td><\/tr><tr><td><strong>Forwarding<\/strong><\/td><td>\u30d5\u30ec\u30fc\u30e0\u3092\u8ee2\u9001\u3059\u308b\u901a\u5e38\u72b6\u614b<\/td><\/tr><tr><td><strong>Disabled<\/strong><\/td><td>\u624b\u52d5\u3067\u7121\u52b9\u5316\uff08shutdown\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td style=\"width:10px;border-color:#fff;background-color:#333\"><\/td><td style=\"font-size:24px;border-color:#fff #fff #333\">STP\u3067\u4f7f\u308f\u308c\u308b\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\uff1aBPDU<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>BPDU\uff08Bridge Protocol Data Unit\uff09<\/strong> \u3068\u306f\u3001<br>\u30b9\u30a4\u30c3\u30c1\u540c\u58eb\u3067STP\u60c5\u5831\u3092\u4ea4\u63db\u3059\u308b\u305f\u3081\u306e\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\u3067\u3059\u3002<\/p>\n\n\n\n<p>BPDU\u306b\u306f\u4ee5\u4e0b\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8ID<\/li>\n\n\n\n<li>\u7d4c\u8def\u30b3\u30b9\u30c8<\/li>\n\n\n\n<li>\u9001\u4fe1\u5143\u30d6\u30ea\u30c3\u30b8ID<\/li>\n\n\n\n<li>\u30bf\u30a4\u30de\u30fc\u60c5\u5831\uff08Hello\u3001Max Age\u3001Forward Delay\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u30bf\u30a4\u30de\u30fc\u8a2d\u5b9a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30bf\u30a4\u30de\u30fc\u540d<\/th><th>\u5185\u5bb9<\/th><th>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/th><\/tr><\/thead><tbody><tr><td><strong>Hello Time<\/strong><\/td><td>BPDU\u9001\u4fe1\u9593\u9694<\/td><td>2\u79d2<\/td><\/tr><tr><td><strong>Forward Delay<\/strong><\/td><td>Listening\/Learning\u306e\u6642\u9593<\/td><td>15\u79d2<\/td><\/tr><tr><td><strong>Max Age<\/strong><\/td><td>BPDU\u60c5\u5831\u306e\u4fdd\u6301\u6642\u9593<\/td><td>20\u79d2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>&#x27a1; \u5408\u8a08\u3067<strong>\u7d0430\u301c50\u79d2<\/strong>\u304b\u3051\u3066\u53ce\u675f\u3059\u308b\u305f\u3081\u3001<br>\u518d\u69cb\u7bc9\u6642\u306b\u901a\u4fe1\u304c\u4e00\u6642\u505c\u6b62\u3059\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td style=\"width:10px;border-color:#fff;background-color:#333\"><\/td><td style=\"font-size:24px;border-color:#fff #fff #333\">RSTP\uff08Rapid STP\uff09\u3078\u306e\u9032\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>STP\u306f\u518d\u53ce\u675f\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u305f\u3081\u3001\u6539\u826f\u7248\u304c\u767b\u5834\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u898f\u683c<\/th><th>\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr><td><strong>STP<\/strong><\/td><td>IEEE 802.1D<\/td><td>\u7d0430\u79d2\u3067\u518d\u53ce\u675f<\/td><\/tr><tr><td><strong>RSTP<\/strong><\/td><td>IEEE 802.1w<\/td><td>\u6570\u79d2\u3067\u518d\u53ce\u675f\uff08\u9ad8\u901fSTP\uff09<\/td><\/tr><tr><td><strong>MSTP<\/strong><\/td><td>IEEE 802.1s<\/td><td>VLAN\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066STP\u8ca0\u8377\u3092\u8efd\u6e1b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td style=\"width:10px;border-color:#fff;background-color:#333\"><\/td><td style=\"font-size:24px;border-color:#fff #fff #333\">\u307e\u3068\u3081<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td>\u540d\u79f0<\/td><td>Spanning Tree Protocol<\/td><\/tr><tr><td>\u898f\u683c<\/td><td>IEEE 802.1D<\/td><\/tr><tr><td>\u76ee\u7684<\/td><td>L2\u30eb\u30fc\u30d7\u9632\u6b62<\/td><\/tr><tr><td>\u4ed5\u7d44\u307f<\/td><td>\u4e00\u90e8\u30dd\u30fc\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u30011\u672c\u306e\u30c4\u30ea\u30fc\u3092\u69cb\u7bc9<\/td><\/tr><tr><td>\u30ad\u30fc\u6982\u5ff5<\/td><td>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3001BPDU\u3001\u30dd\u30fc\u30c8\u5f79\u5272\u3001\u72b6\u614b\u9077\u79fb<\/td><\/tr><tr><td>\u554f\u984c\u70b9<\/td><td>\u518d\u53ce\u675f\u304c\u9045\u3044\uff0830\u79d2\u524d\u5f8c\uff09<\/td><\/tr><tr><td>\u6539\u826f\u7248<\/td><td>RSTP\uff08\u9ad8\u901f\uff09\u3001MSTP\uff08\u8907\u6570VLAN\u5bfe\u5fdc\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>STP\uff08Spanning Tree Protocol\uff09\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308b\u30eb\u30fc\u30d7\u3092\u9632\u6b62\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002 IEEE\u898f\u683c\u3067\u306f IEEE 802.1D \u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002 STP\u306e\u76ee\u7684\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1290","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1290"}],"version-history":[{"count":12,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1290\/revisions"}],"predecessor-version":[{"id":1347,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1290\/revisions\/1347"}],"wp:attachment":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}