{"id":277,"date":"2025-03-13T10:50:00","date_gmt":"2025-03-13T01:50:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=277"},"modified":"2025-10-11T15:19:28","modified_gmt":"2025-10-11T06:19:28","slug":"stp%ef%bc%88%e6%8b%a1%e5%bc%b5%e6%8a%80%e8%a1%93%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=277","title":{"rendered":"STP\uff08\u62e1\u5f35\u6280\u8853\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">STP\u62e1\u5f35\u6a5f\u80fd\uff1aBPDU\u30ac\u30fc\u30c9\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">BPDU\u30ac\u30fc\u30c9<\/span><\/strong>\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u30d7\u30ed\u30c8\u30b3\u30eb\uff08STP\uff09\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u7528\u3044\u3089\u308c\u308b\u6a5f\u80fd\u3067\u3059\u3002\u7279\u306b<strong><span class=\"swl-marker mark_yellow\">PortFast\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u30dd\u30fc\u30c8<\/span><\/strong>\u3067\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u4e88\u671f\u3057\u306a\u3044\u30b9\u30a4\u30c3\u30c1\u63a5\u7d9a\u3084\u30eb\u30fc\u30d7\u306e\u767a\u751f\u3092\u672a\u7136\u306b\u9632\u3050\u5f79\u5272\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PortFast\u306e\u524d\u63d0\u306f\u300cPC\u3084\u30b5\u30fc\u30d0\u306e\u3088\u3046\u306a\u672b\u7aef\u6a5f\u5668\u304c\u63a5\u7d9a\u3055\u308c\u308b\u3053\u3068\u300d\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u3082\u3057\u305d\u306e\u30dd\u30fc\u30c8\u306b\u5225\u306e\u30b9\u30a4\u30c3\u30c1\u3092\u63a5\u7d9a\u3057\u3066\u3057\u307e\u3046\u3068\u3001BPDU\uff08\u30d6\u30ea\u30c3\u30b8\u30d7\u30ed\u30c8\u30b3\u30eb\u30c7\u30fc\u30bf\u30e6\u30cb\u30c3\u30c8\uff09\u304c\u6d41\u308c\u8fbc\u307f\u3001\u610f\u56f3\u3057\u306a\u3044STP\u306e\u52d5\u4f5c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067BPDU\u30ac\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3057\u3066\u304a\u3051\u3070\u3001BPDU\u3092\u53d7\u4fe1\u3057\u305f\u77ac\u9593\u306b\u8a72\u5f53\u30dd\u30fc\u30c8\u3092<strong><span class=\"swl-marker mark_yellow\">error-disabled\u72b6\u614b<\/span><\/strong>\u306b\u3057\u3001\u5b89\u5168\u3092\u78ba\u4fdd\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cPortFast\u3068BPDU\u30ac\u30fc\u30c9\u306f\u30bb\u30c3\u30c8\u3067\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u300d\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u5b9f\u52d9\u3067\u3082STP\u30eb\u30fc\u30d7\u9632\u6b62\u7b56\u3068\u3057\u3066\u307b\u307c\u5e38\u8b58\u7684\u306b\u5c0e\u5165\u3055\u308c\u308b\u306e\u3067\u3001\u78ba\u5b9f\u306b\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BPDU\u30ac\u30fc\u30c9\u306e\u9069\u7528\u7bc4\u56f2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BPDU\u30ac\u30fc\u30c9\u306f\u3001\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u3082\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\uff08\u30b0\u30ed\u30fc\u30d0\u30eb\uff09\u3067\u3082\u6709\u52b9\u5316\u3067\u304d\u307e\u3059\u3002\u4e21\u8005\u306e\u9055\u3044\u3092\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u8a2d\u5b9a\u65b9\u6cd5<\/th><th>\u9069\u7528\u7bc4\u56f2<\/th><\/tr><\/thead><tbody><tr><td>\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u6709\u52b9\u5316<\/td><td>\u8a72\u5f53\u30dd\u30fc\u30c8\u306b\u5fc5\u305aBPDU\u30ac\u30fc\u30c9\u304c\u50cd\u304f\u3002PortFast\u306e\u6709\u7121\u306b\u95a2\u4fc2\u306a\u304f\u9069\u7528\u3055\u308c\u308b\u3002<\/td><\/tr><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u6709\u52b9\u5316<\/td><td>\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\u3067PortFast\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u30dd\u30fc\u30c8\u306b\u306e\u307fBPDU\u30ac\u30fc\u30c9\u304c\u50cd\u304f\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300c\u30b0\u30ed\u30fc\u30d0\u30eb\u6709\u52b9\u5316\u3067\u306fPortFast\u304c\u6761\u4ef6\u306b\u306a\u308b\u300d\u3068\u3044\u3046\u70b9\u304c\u554f\u308f\u308c\u3084\u3059\u3044\u306e\u3067\u8981\u6ce8\u610f\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BPDU\u30ac\u30fc\u30c9\u306e\u8a2d\u5b9a\u30b3\u30de\u30f3\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u8a2d\u5b9a\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# spanning-tree bpduguard enable<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\u3067\u6709\u52b9\u5316\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree portfast bpduguard default<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">BPDU\u30ac\u30fc\u30c9\u304c\u52d5\u4f5c\u3057\u305f\u3068\u304d\u306e\u6319\u52d5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3057BPDU\u30ac\u30fc\u30c9\u304c\u6709\u52b9\u306a\u30dd\u30fc\u30c8\u306b\u30b9\u30a4\u30c3\u30c1\u3092\u63a5\u7d9a\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u3001\u305d\u306e\u30dd\u30fc\u30c8\u306f\u81ea\u52d5\u7684\u306b<strong><span class=\"swl-marker mark_yellow\">err-disable\u72b6\u614b<\/span><\/strong>\u306b\u79fb\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>%SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port Fa0\/1 with BPDU Guard enabled. Disabling port.\n%PM-4-ERR_DISABLE: bpduguard error detected on Fa0\/1, putting Fa0\/1 in err-disable state<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">err-disable\u306b\u306a\u3063\u305f\u30dd\u30fc\u30c8\u306f\u3001\u305d\u306e\u307e\u307e\u3067\u306f\u901a\u4fe1\u3067\u304d\u307e\u305b\u3093\u3002\u5fa9\u65e7\u3055\u305b\u308b\u65b9\u6cd5\u306f2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u624b\u52d5\u3067 <code>shutdown<\/code> \u3068 <code>no shutdown<\/code> \u3092\u5165\u529b\u3059\u308b<\/li>\n\n\n\n<li>\u81ea\u52d5\u5fa9\u65e7\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u52d5\u5fa9\u65e7\u3092\u4f7f\u3046\u5834\u5408\u306e\u8a2d\u5b9a\u4f8b\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# errdisable recovery cause bpduguard<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f<strong><span class=\"swl-marker mark_yellow\">300\u79d2\u3054\u3068<\/span><\/strong>\u306b\u30dd\u30fc\u30c8\u304c\u5fa9\u65e7\u3092\u8a66\u307f\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fbBPDU\u30ac\u30fc\u30c9\u306fPortFast\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u57fa\u672c\u3067\u3042\u308b\u3053\u3068<br>\u30fb\u30dd\u30fc\u30c8\u5358\u4f4d\u3068\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u306e\u9055\u3044<br>\u30fbBPDU\u53d7\u4fe1\u6642\u306b\u30dd\u30fc\u30c8\u304cerr-disable\u306b\u306a\u308b\u6319\u52d5<br>\u30fb\u81ea\u52d5\u5fa9\u65e7\u306e\u30b3\u30de\u30f3\u30c9\u8a2d\u5b9a<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\u62e1\u5f35\u6a5f\u80fd\uff1aBPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/span><\/strong>\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306b\u95a2\u9023\u3059\u308b\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\uff08BPDU\uff09\u306e\u9001\u53d7\u4fe1\u3092\u5236\u5fa1\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002\u7279\u306b<strong><span class=\"swl-marker mark_yellow\">PortFast\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u30dd\u30fc\u30c8<\/span><\/strong>\u306b\u5bfe\u3057\u3066\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u901a\u5e38\u306fPC\u3084\u30b5\u30fc\u30d0\u306a\u3069\u306e\u672b\u7aef\u6a5f\u5668\u306bBPDU\u304c\u6d41\u308c\u8fbc\u3080\u306e\u3092\u9632\u3050\u76ee\u7684\u3067\u5c0e\u5165\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PC\u3084\u30b5\u30fc\u30d0\u306fSTP\u306b\u53c2\u52a0\u3057\u307e\u305b\u3093\u304b\u3089\u3001BPDU\u3092\u53d7\u3051\u53d6\u3063\u3066\u3082\u610f\u5473\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3080\u3057\u308d\u3001\u4f59\u8a08\u306a\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u308b\u3060\u3051\u901a\u4fe1\u8ca0\u8377\u306b\u306a\u308b\u306e\u3067\u3001BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u3088\u3063\u3066BPDU\u306e\u9001\u4fe1\u3092\u6b62\u3081\u3001\u53d7\u4fe1\u3057\u305fBPDU\u306f\u7834\u68c4\u3059\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u3053\u306e\u6a5f\u80fd\u306f\u6271\u3044\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u3001BPDU\u306e\u3084\u308a\u53d6\u308a\u304c\u5b8c\u5168\u306b\u6b62\u307e\u308b\u3068\u3001\u30dd\u30fc\u30c8\u304cSTP\u306b\u53c2\u52a0\u3057\u306a\u304f\u306a\u308a\u3001\u601d\u308f\u306c<strong><span class=\"swl-marker mark_yellow\">\u30eb\u30fc\u30d7\u767a\u751f\u306e\u30ea\u30b9\u30af<\/span><\/strong>\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001<strong><span class=\"swl-marker mark_yellow\">BPDU\u30ac\u30fc\u30c9\u304c\u63a8\u5968\u3055\u308c\u308b\u4e00\u65b9\u3067\u3001BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u57fa\u672c\u7684\u306b\u306f\u975e\u63a8\u5968<\/span><\/strong>\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u9069\u7528\u7bc4\u56f2\u3068\u6319\u52d5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u300c\u30dd\u30fc\u30c8\u5358\u4f4d\u300d\u3068\u300c\u30b0\u30ed\u30fc\u30d0\u30eb\u300d\u306e2\u7a2e\u985e\u306e\u8a2d\u5b9a\u65b9\u6cd5\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u52d5\u4f5c\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u8a66\u9a13\u3067\u3082\u51fa\u984c\u3055\u308c\u3084\u3059\u3044\u90e8\u5206\u306a\u306e\u3067\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u8a2d\u5b9a\u65b9\u6cd5<\/th><th>\u52d5\u4f5c\u306e\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr><td>\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u6709\u52b9\u5316<\/td><td>PortFast\u306e\u6709\u7121\u306b\u95a2\u4fc2\u306a\u304f\u3001\u305d\u306e\u30dd\u30fc\u30c8\u3067\u306fBPDU\u306e\u9001\u53d7\u4fe1\u304c\u5b8c\u5168\u306b\u505c\u6b62\u3002\u4e8b\u5b9f\u4e0a\u3001\u305d\u306e\u30dd\u30fc\u30c8\u3067STP\u304c\u7121\u52b9\u5316\u3055\u308c\u308b\u3002<\/td><\/tr><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u6709\u52b9\u5316<\/td><td>PortFast\u304c\u6709\u52b9\u306a\u30dd\u30fc\u30c8\u306e\u307fBPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u304c\u9069\u7528\u3055\u308c\u308b\u3002\u6700\u521d\u306fBPDU\u9001\u4fe1\u3092\u505c\u6b62\u3059\u308b\u304c\u3001\u3082\u3057BPDU\u3092\u53d7\u4fe1\u3057\u305f\u5834\u5408\u306fPortFast\u304c\u89e3\u9664\u3055\u308c\u3001\u901a\u5e38\u306eSTP\u52d5\u4f5c\u306b\u623b\u308b\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u9055\u3044\u304c\u7406\u89e3\u3067\u304d\u3066\u3044\u306a\u3044\u3068\u6df7\u4e71\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u300c\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u3067\u306f\u53d7\u4fe1\u3057\u305fBPDU\u306b\u3088\u3063\u3066\u52d5\u4f5c\u304c\u5207\u308a\u66ff\u308f\u308b\u300d\u3068\u3044\u3046\u30dd\u30a4\u30f3\u30c8\u3092\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u8a2d\u5b9a\u30b3\u30de\u30f3\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u8a2d\u5b9a\u3059\u308b\u5834\u5408\u306e\u30b3\u30de\u30f3\u30c9\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# spanning-tree bpdufilter enable<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\u3067\u6709\u52b9\u5316\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree portfast bpdufilter default<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5b9f\u52d9\u306b\u304a\u3051\u308b\u5229\u7528\u30b7\u30fc\u30f3\u3068\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">BPDU\u30ac\u30fc\u30c9\u306f\u300c\u30eb\u30fc\u30d7\u9632\u6b62\u300d\u306b\u76f4\u7d50\u3059\u308b\u305f\u3081\u63a8\u5968\u3055\u308c\u307e\u3059\u304c\u3001BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u8aa4\u7528\u3059\u308b\u3068\u30eb\u30fc\u30d7\u3092\u52a9\u9577\u3059\u308b\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u901a\u5e38\u306f\u63a8\u5968\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u308c\u3067\u3082\u5229\u7528\u3055\u308c\u308b\u30b1\u30fc\u30b9\u3068\u3057\u3066\u306f\u3001\u300cSTP\u3092\u5b8c\u5168\u306b\u7121\u52b9\u5316\u306f\u3057\u305f\u304f\u306a\u3044\u304c\u3001\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u304b\u3089BPDU\u3092\u9001\u4fe1\u3055\u305b\u305f\u304f\u306a\u3044\u300d\u3068\u3044\u3046\u3088\u3046\u306a\u7279\u6b8a\u306a\u74b0\u5883\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5916\u90e8\u306e\u7ba1\u7406\u5bfe\u8c61\u5916\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u30dd\u30fc\u30c8\u306a\u3069\u304c\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fbBPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u57fa\u672c\u7684\u306a\u5f79\u5272\uff08BPDU\u9001\u53d7\u4fe1\u3092\u5236\u5fa1\u3059\u308b\u6a5f\u80fd\uff09<br>\u30fb\u30dd\u30fc\u30c8\u5358\u4f4d\u3068\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u3067\u306e\u52d5\u4f5c\u306e\u9055\u3044<br>\u30fb\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u3067\u306f\u300cBPDU\u3092\u53d7\u4fe1\u3059\u308b\u3068PortFast\u304c\u89e3\u9664\u3055\u308c\u308b\u300d\u70b9<br>\u30fb\u63a8\u5968\u3055\u308c\u308bBPDU\u30ac\u30fc\u30c9\u3068\u306e\u6bd4\u8f03\uff08BPDU\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u975e\u63a8\u5968\u3067\u3042\u308b\u3053\u3068\uff09<br><br>\u7279\u306b\u300c\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u3067\u306e\u52d5\u4f5c\u300d\u304c\u7d30\u304b\u304f\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3001\u8868\u306e\u5185\u5bb9\u3092\u305d\u306e\u307e\u307e\u30a4\u30e1\u30fc\u30b8\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304f\u3068\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\u62e1\u5f35\u6a5f\u80fd\uff1a\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9<\/span><\/strong>\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306b\u304a\u3044\u3066<strong><span class=\"swl-marker mark_yellow\">\u610f\u56f3\u3057\u306a\u3044\u30b9\u30a4\u30c3\u30c1\u304c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u306a\u308b\u306e\u3092\u9632\u3050<\/span><\/strong>\u305f\u3081\u306e\u6a5f\u80fd\u3067\u3059\u3002\u901a\u5e38\u3001STP\u3067\u306fBPDU\u306e\u60c5\u5831\u3092\u6bd4\u8f03\u3057\u3001\u30d6\u30ea\u30c3\u30b8ID\u304c\u6700\u3082\u5c0f\u3055\u3044\u30b9\u30a4\u30c3\u30c1\u304c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u9078\u3070\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u65b0\u3057\u304f\u30b9\u30a4\u30c3\u30c1\u304c\u8ffd\u52a0\u3055\u308c\u305f\u308a\u3001\u8a2d\u5b9a\u30df\u30b9\u3067\u512a\u5148\u5ea6\u306e\u4f4e\u3044\u30b9\u30a4\u30c3\u30c1\u304c\u63a5\u7d9a\u3055\u308c\u305f\u308a\u3059\u308b\u3068\u3001\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304c\u66f8\u304d\u63db\u308f\u3063\u3066\u3057\u307e\u3044\u3001\u65e2\u5b58\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u304c\u5909\u5316\u3059\u308b\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001STP\u306e\u518d\u53ce\u675f\u304c\u8d77\u3053\u308a\u3001\u4e00\u6642\u7684\u306a\u901a\u4fe1\u65ad\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3053\u3046\u3057\u305f\u77ac\u65ad\u3067\u3082\u5927\u304d\u306a\u5f71\u97ff\u3092\u53ca\u307c\u3059\u305f\u3081\u3001\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306e\u4f4d\u7f6e\u3092\u5f37\u5236\u7684\u306b\u56fa\u5b9a\u3057\u305f\u3044\u5834\u9762\u3067\u306f\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u304c\u6709\u52b9\u306b\u50cd\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u305f\u30dd\u30fc\u30c8\u304c\u300c\u3088\u308a\u512a\u5148\u5ea6\u306e\u9ad8\u3044BPDU\uff08\u4e0a\u4f4dBPDU\uff09\u300d\u3092\u53d7\u4fe1\u3057\u305f\u5834\u5408\u3001\u305d\u306e\u30dd\u30fc\u30c8\u306f\u81ea\u52d5\u7684\u306b<span class=\"swl-marker mark_yellow\"><strong>root-inconsistent\u72b6\u614b<\/strong>\u306b<\/span>\u79fb\u884c\u3057\u307e\u3059\u3002<br>\u3053\u306e\u72b6\u614b\u3067\u306f\u30d5\u30ec\u30fc\u30e0\u8ee2\u9001\u304c\u6b62\u307e\u308a\u3001\u305d\u306e\u30dd\u30fc\u30c8\u7d4c\u7531\u3067\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304c\u66f8\u304d\u63db\u308f\u308b\u306e\u3092\u9632\u6b62\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u3057\u3066\u3001\u4e0d\u6b63\u306aBPDU\u306e\u53d7\u4fe1\u304c\u6b62\u307e\u308c\u3070\u3001\u81ea\u52d5\u7684\u306broot-inconsistent\u72b6\u614b\u304b\u3089\u5fa9\u5e30\u3057\u3001\u901a\u5e38\u306e\u30dd\u30fc\u30c8\u3068\u3057\u3066\u518d\u3073\u5229\u7528\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300c\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306f\u30dd\u30fc\u30c8\u3092err-disable\u306b\u3057\u306a\u3044\u300d\u300cBPDU\u306e\u53d7\u4fe1\u304c\u306a\u304f\u306a\u308c\u3070\u81ea\u52d5\u5fa9\u65e7\u3059\u308b\u300d\u3068\u3044\u3046\u70b9\u3067\u3059\u3002BPDU\u30ac\u30fc\u30c9\u3068\u6df7\u540c\u3057\u3084\u3059\u3044\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306f<strong><span class=\"swl-marker mark_yellow\">\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u306e\u307f<\/span><\/strong>\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u306e\u4e00\u62ec\u8a2d\u5b9a\u306f\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u7ba1\u7406\u3057\u3066\u3044\u306a\u3044\u6a5f\u5668\u3084\u5916\u90e8\u30b9\u30a4\u30c3\u30c1\u3068\u63a5\u7d9a\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u30dd\u30fc\u30c8\u306b\u500b\u5225\u3067\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u30b3\u30de\u30f3\u30c9\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# spanning-tree guard root<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306e\u72b6\u614b\u78ba\u8a8d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306b\u3088\u3063\u3066root-inconsistent\u72b6\u614b\u306b\u5165\u3063\u305f\u30dd\u30fc\u30c8\u306f\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># show spanning-tree inconsistentports<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ed\u30b0\u51fa\u529b\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306b\u3088\u3063\u3066\u30dd\u30fc\u30c8\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u305f\u5834\u5408\u3001\u6b21\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>%SPANTREE-2-ROOTGUARD_BLOCK: Root guard blocking port FastEthernet0\/3 on VLAN0001<\/code><\/pre>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fb\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u306f\u300c\u610f\u56f3\u3057\u306a\u3044\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306e\u5909\u66f4\u300d\u3092\u9632\u6b62\u3059\u308b\u6a5f\u80fd<br>\u30fbroot-inconsistent\u72b6\u614b\u306b\u306a\u308b\u304c\u3001err-disable\u306b\u306f\u306a\u3089\u306a\u3044<br>\u30fb\u4e0d\u6b63\u306aBPDU\u306e\u53d7\u4fe1\u304c\u6b62\u307e\u308c\u3070\u81ea\u52d5\u7684\u306b\u5fa9\u5e30\u3059\u308b<br>\u30fb\u8a2d\u5b9a\u306f\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u306e\u307f\u53ef\u80fd<br><br>\u3053\u308c\u3089\u306f\u7279\u306b<strong>BPDU\u30ac\u30fc\u30c9\u3068\u306e\u9055\u3044<\/strong>\u3068\u30bb\u30c3\u30c8\u3067\u554f\u308f\u308c\u3084\u3059\u3044\u305f\u3081\u3001\u6574\u7406\u3057\u3066\u899a\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\u62e1\u5f35\u6a5f\u80fd\uff1a\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9<\/span><\/strong>\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u5197\u9577\u69cb\u6210\u306b\u304a\u3044\u3066<strong><span class=\"swl-marker mark_yellow\">BPDU\u304c\u53d7\u4fe1\u3055\u308c\u306a\u304f\u306a\u3063\u305f\u3068\u304d\u306b\u8aa4\u3063\u3066\u30dd\u30fc\u30c8\u304c\u8ee2\u9001\u72b6\u614b\u306b\u306a\u308b\u306e\u3092\u9632\u3050\u6a5f\u80fd<\/span><\/strong>\u3067\u3059\u3002\u3082\u3057\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u304c\u306a\u3051\u308c\u3070\u3001\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u4e2d\u306e\u30dd\u30fc\u30c8\u304c\u300cBPDU\u304c\u5c4a\u304b\u306a\u3044\uff1d\u63a5\u7d9a\u5148\u304c\u6d88\u3048\u305f\u300d\u3068\u8aa4\u8a8d\u3057\u3001\u6307\u5b9a\u30dd\u30fc\u30c8\uff08DP\uff09\u3078\u79fb\u884c\u3057\u3066\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u72b6\u614b\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u5197\u9577\u30d1\u30b9\u306b\u304a\u3044\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u308b\u30dd\u30fc\u30c8\u304c\u4e00\u5207\u306a\u304f\u306a\u308a\u3001\u7d50\u679c\u3068\u3057\u3066<strong><span class=\"swl-marker mark_yellow\">L2\u30eb\u30fc\u30d7<\/span><\/strong>\u304c\u8d77\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u3001<span class=\"swl-marker mark_yellow\"><strong>\u5358\u4e00\u65b9\u5411\u30ea\u30f3\u30af\u969c\u5bb3<\/strong>\u3084<strong>STP\u30d7\u30ed\u30bb\u30b9\u306e\u7570\u5e38\u505c\u6b62<\/strong><\/span>\u3068\u3044\u3063\u305f\u30b1\u30fc\u30b9\u3067\u306f\u3001\u3053\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u3068\u3001\u672c\u6765BPDU\u3092\u53d7\u4fe1\u3059\u3079\u304d\u4ee3\u66ff\u30dd\u30fc\u30c8\u3084\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u3067BPDU\u304c\u5c4a\u304b\u306a\u304f\u306a\u3063\u305f\u5834\u5408\u3001\u305d\u306e\u30dd\u30fc\u30c8\u306f<strong><span class=\"swl-marker mark_yellow\">loop-inconsistent\u72b6\u614b<\/span><\/strong>\u306b\u79fb\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u72b6\u614b\u3067\u306f\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u79fb\u884c\u3057\u306a\u3044\u305f\u3081\u3001\u610f\u56f3\u3057\u306a\u3044L2\u30eb\u30fc\u30d7\u304c\u9632\u6b62\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001\u518d\u3073BPDU\u304c\u53d7\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308c\u3070\u3001\u81ea\u52d5\u7684\u306bloop-inconsistent\u72b6\u614b\u304b\u3089\u5fa9\u65e7\u3057\u3001\u901a\u5e38\u306eSTP\u52d5\u4f5c\u306b\u623b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u624b\u52d5\u3067\u5fa9\u65e7\u4f5c\u696d\u3092\u884c\u3046\u5fc5\u8981\u304c\u306a\u304f\u3001STP\u306e\u5b89\u5b9a\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u904b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u62bc\u3055\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306ferr-disable\u3092\u767a\u751f\u3055\u305b\u306a\u3044<\/span><\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002BPDU\u30ac\u30fc\u30c9\u3068\u306e\u9055\u3044\u3092\u6df7\u540c\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u8a66\u9a13\u3067\u306f\u8981\u6ce8\u610f\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306f<strong><span class=\"swl-marker mark_yellow\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5358\u4f4d\u3067\u3082\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u3082<\/span><\/strong>\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u63a8\u5968\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u306e\u6709\u52b9\u5316\u3067\u3001\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\u306b\u4e00\u62ec\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u6700\u5927\u306e\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b0\u30ed\u30fc\u30d0\u30eb\u3067\u306e\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree loopguard default<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30fc\u30c8\u5358\u4f4d\u3067\u306e\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# spanning-tree guard loop<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u3068\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306f<strong><span class=\"swl-marker mark_yellow\">\u6392\u4ed6\u7684<\/span><\/strong>\u3067\u3042\u308a\u3001\u540c\u3058\u30dd\u30fc\u30c8\u306b\u4e21\u65b9\u306e\u6a5f\u80fd\u3092\u540c\u6642\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u70b9\u3082\u8a66\u9a13\u3067\u554f\u308f\u308c\u3084\u3059\u3044\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u72b6\u614b\u78ba\u8a8d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306b\u3088\u3063\u3066loop-inconsistent\u72b6\u614b\u306b\u306a\u3063\u305f\u30dd\u30fc\u30c8\u306f\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># show spanning-tree inconsistentports<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ed\u30b0\u51fa\u529b\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u304c\u50cd\u3044\u3066\u30dd\u30fc\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u305f\u5834\u5408\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>%SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port FastEthernet0\/1 on VLAN0010<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u304c\u89e3\u9664\u3055\u308c\u305f\u5834\u5408\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>%SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port FastEthernet0\/1 on VLAN0010<\/code><\/pre>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fb\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306f\u300cBPDU\u3092\u53d7\u4fe1\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u30dd\u30fc\u30c8\u300d\u3092\u5bfe\u8c61\u306bloop-inconsistent\u72b6\u614b\u306b\u3059\u308b\u6a5f\u80fd<br>\u30fb\u5197\u9577\u69cb\u6210\u3067\u306eL2\u30eb\u30fc\u30d7\u9632\u6b62\u7b56\u3068\u3057\u3066\u5229\u7528\u3055\u308c\u308b<br>\u30fb\u5fa9\u65e7\u306f\u81ea\u52d5\u3067\u884c\u308f\u308c\u308b\uff08err-disable\u306b\u306f\u306a\u3089\u306a\u3044\uff09<br>\u30fb\u30b0\u30ed\u30fc\u30d0\u30eb\u30fb\u30dd\u30fc\u30c8\u5358\u4f4d\u306e\u4e21\u65b9\u3067\u8a2d\u5b9a\u53ef\u80fd<br>\u30fb\u30eb\u30fc\u30c8\u30ac\u30fc\u30c9\u3068\u306e\u540c\u6642\u5229\u7528\u306f\u4e0d\u53ef<br><br>\u3053\u306e\u3088\u3046\u306b\u3001\u30eb\u30fc\u30d7\u30ac\u30fc\u30c9\u306f\u5197\u9577\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5b89\u5b9a\u6027\u3092\u5b88\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001\u8a66\u9a13\u3067\u3082\u5b9f\u52d9\u3067\u3082\u91cd\u8981\u306a\u77e5\u8b58\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u25c6\u307e\u3068\u3081\u30b9\u30e9\u30a4\u30c9<\/h2>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/03\/STP\uff08\u62e1\u5f35\u6280\u8853\uff09.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"STP\uff08\u62e1\u5f35\u6280\u8853\uff09\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-ff09d27a-2fe2-455a-870a-67d8bab2ca41\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/03\/STP\uff08\u62e1\u5f35\u6280\u8853\uff09.pdf\">STP\uff08\u62e1\u5f35\u6280\u8853\uff09<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>STP\u62e1\u5f35\u6a5f\u80fd\uff1aBPDU\u30ac\u30fc\u30c9\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5 BPDU\u30ac\u30fc\u30c9\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u30d7\u30ed\u30c8\u30b3\u30eb\uff08STP\uff09\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u7528\u3044\u3089\u308c\u308b\u6a5f\u80fd\u3067\u3059\u3002\u7279\u306bPortFast\u304c\u8a2d\u5b9a\u3055\u308c\u305f\u30dd\u30fc\u30c8\u3067\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u4e88\u671f\u3057\u306a\u3044\u30b9\u30a4\u30c3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[12],"tags":[],"class_list":["post-277","post","type-post","status-publish","format-standard","hentry","category-network-access"],"_links":{"self":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/277","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=277"}],"version-history":[{"count":2,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/277\/revisions"}],"predecessor-version":[{"id":652,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/277\/revisions\/652"}],"wp:attachment":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}