{"id":270,"date":"2025-03-13T10:46:00","date_gmt":"2025-03-13T01:46:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=270"},"modified":"2025-10-11T15:03:31","modified_gmt":"2025-10-11T06:03:31","slug":"stp%ef%bc%88%e7%99%ba%e5%b1%95%e3%81%a8%e8%a8%ad%e5%ae%9a%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=270","title":{"rendered":"STP\uff08\u767a\u5c55\u3068\u8a2d\u5b9a\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u30c8\u30dd\u30ed\u30b8\u30fc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u69cb\u6210\u65b9\u6cd5\u306b\u306f\u5927\u304d\u304f2\u3064\u306e\u8003\u3048\u65b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3064\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u30671\u3064\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u3092\u5f62\u6210\u3059\u308b <strong><span class=\"swl-marker mark_yellow\">CST\uff08Common Spanning Tree\uff09<\/span><\/strong>\u3001\u3082\u30461\u3064\u306fVLAN\u3054\u3068\u306b\u500b\u5225\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u3092\u69cb\u6210\u3067\u304d\u308b <strong><span class=\"swl-marker mark_yellow\">PVST+\uff08Per-VLAN Spanning Tree Plus\uff09<\/span><\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cCST\u306f\u30b7\u30f3\u30d7\u30eb\u3060\u304c\u8ca0\u8377\u5206\u6563\u3067\u304d\u306a\u3044\u300d\u300cPVST+\u306fVLAN\u3054\u3068\u306b\u8abf\u6574\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u9055\u3044\u3092\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CST\uff08Common Spanning Tree\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">CST<\/span><\/strong>\u306f\u3001VLAN\u304c\u3044\u304f\u3064\u5b58\u5728\u3057\u3066\u3044\u3066\u3082\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306f1\u3064\u3060\u3051\u4f5c\u3089\u308c\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3064\u307e\u308a\u3001VLAN\u3054\u3068\u306b\u5225\u3005\u306e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001VLAN10\u306e\u30db\u30b9\u30c8A\u3068VLAN20\u306e\u30db\u30b9\u30c8B\u304c\u3044\u3066\u3082\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306f\u5171\u901a\u306e\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u30d1\u30b9\u3092\u901a\u308a\u307e\u3059\u3002\u3082\u3057\u305d\u306e\u30ea\u30f3\u30af\u306b\u969c\u5bb3\u304c\u8d77\u304d\u305f\u5834\u5408\u306f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30ea\u30f3\u30af\u304cSTP\u306b\u3088\u3063\u3066\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u72b6\u614b\u3078\u5207\u308a\u66ff\u308f\u308a\u307e\u3059\u304c\u3001\u5e73\u5e38\u6642\u306b\u306f\u5229\u7528\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CST\u304c\u6a19\u6e96\u5316\u3055\u308c\u305f\u5f53\u521d\uff08IEEE 802.1D\u5236\u5b9a\u6642\uff09\u306f\u3001VLAN\u3068\u3044\u3046\u6982\u5ff5\u81ea\u4f53\u304c\u306a\u304b\u3063\u305f\u305f\u3081\u3001\u5f53\u6642\u306e\u30b9\u30a4\u30c3\u30c1\u306fCST\u3057\u304b\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PVST+\uff08Per-VLAN Spanning Tree Plus\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">PVST+<\/span><\/strong>\u306fCisco\u72ec\u81ea\u306b\u62e1\u5f35\u3055\u308c\u305f\u4ed5\u7d44\u307f\u3067\u3001VLAN\u3054\u3068\u306b\u72ec\u7acb\u3057\u305fSTP\u3092\u69cb\u6210\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001VLAN\u3054\u3068\u306b\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u5206\u3051\u3066\u8a2d\u5b9a\u3057\u3001\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u3092\u884c\u3046\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001SWA\u3092VLAN10\u306e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3001SWB\u3092VLAN20\u306e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u3059\u308b\u3053\u3068\u3067\u3001VLAN\u3054\u3068\u306b\u7570\u306a\u308b\u901a\u4fe1\u7d4c\u8def\u3092\u9078\u3070\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u3042\u308bVLAN\u306e\u901a\u4fe1\u306fSWA\u7d4c\u7531\u3001\u5225\u306eVLAN\u306e\u901a\u4fe1\u306fSWB\u7d4c\u7531\u3068\u3044\u3063\u305f\u5206\u6563\u304c\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u30011\u3064\u306e\u7269\u7406\u30dd\u30fc\u30c8\u3067\u3082VLAN\u3054\u3068\u306b\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u3084\u6307\u5b9a\u30dd\u30fc\u30c8\u306e\u5f79\u5272\u3092\u5909\u3048\u3089\u308c\u308b\u70b9\u304c\u7279\u5fb4\u3067\u3059\u3002\u3064\u307e\u308a\u540c\u3058\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3082\u3001VLAN10\u3067\u306f\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u3001VLAN20\u3067\u306f\u975e\u6307\u5b9a\u30dd\u30fc\u30c8\u3068\u3044\u3063\u305f\u5177\u5408\u306b\u7570\u306a\u308b\u5f79\u5272\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PVST+\u306b\u304a\u3051\u308b\u62e1\u5f35\u30b7\u30b9\u30c6\u30e0ID<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CST\u306e\u6642\u4ee3\u306f\u3001\u30d6\u30ea\u30c3\u30b8ID\u306f\u300c\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u300d\u3068\u300cMAC\u30a2\u30c9\u30ec\u30b9\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024\u306f 32768 \u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3001PVST+\u3067\u306f\u300c\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u300d\u300c\u62e1\u5f35\u30b7\u30b9\u30c6\u30e0ID\u300d\u300cMAC\u30a2\u30c9\u30ec\u30b9\u300d\u306e3\u8981\u7d20\u3067\u30d6\u30ea\u30c3\u30b8ID\u3092\u69cb\u6210\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u8ffd\u52a0\u3055\u308c\u305f\u62e1\u5f35\u30b7\u30b9\u30c6\u30e0ID\u306b\u306f\u300cVLAN ID\u300d\u306e\u60c5\u5831\u304c\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001VLAN\u3054\u3068\u306b\u7570\u306a\u308b\u30d6\u30ea\u30c3\u30b8ID\u3092\u6301\u3066\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\u62e1\u5f35\u30b7\u30b9\u30c6\u30e0ID\u306e\u5c0e\u5165\u306b\u3088\u3063\u3066\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u306e\u5024\u3092\u7d30\u304b\u304f\u8a2d\u5b9a\u3067\u304d\u306a\u304f\u306a\u308a\u30014096\u523b\u307f\u3067\u3057\u304b\u6307\u5b9a\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN1\u306e\u5834\u5408\uff1a\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3 32768 + VLAN ID 1 = 32769<\/li>\n\n\n\n<li>VLAN10\u306e\u5834\u5408\uff1a\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3 32768 + VLAN ID 10 = 32778<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001VLAN\u3054\u3068\u306b\u7570\u306a\u308b\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300c\u306a\u305c4096\u523b\u307f\u3067\u3057\u304b\u8a2d\u5b9a\u3067\u304d\u306a\u3044\u306e\u304b\uff1f\u300d\u3068\u3044\u3046\u554f\u3044\u304c\u51fa\u305f\u5834\u5408\u3001\u62e1\u5f35\u30b7\u30b9\u30c6\u30e0ID\u306b\u3088\u3063\u30664\u30d3\u30c3\u30c8\u304c\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u3068\u7b54\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\u306e\u8a2d\u5b9a\uff08PVST+\u306e\u8a2d\u5b9a\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Catalyst\u30b9\u30a4\u30c3\u30c1\u3067\u306f\u3001\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u57fa\u672c\u7684\u306b\u306f\u8ffd\u52a0\u306e\u8a2d\u5b9a\u306f\u4e0d\u8981\u3067\u3059\u304c\u3001\u7121\u52b9\u5316\u3057\u3066\u3044\u305f\u5834\u5408\u3084\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u610f\u56f3\u7684\u306b\u6c7a\u3081\u305f\u3044\u5834\u5408\u306b\u306f\u3001\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u8a66\u9a13\u3067\u554f\u308f\u308c\u3084\u3059\u3044 <strong><span class=\"swl-marker mark_yellow\">\u6709\u52b9\u5316\u30fb\u7121\u52b9\u5316\u306e\u8a2d\u5b9a<\/span><\/strong> \u3068 <span class=\"swl-marker mark_yellow\"><strong>\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u306e\u8abf\u6574<\/strong> <\/span>\u306b\u3064\u3044\u3066\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u6709\u52b9\u5316\u3068\u7121\u52b9\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">STP\u306fVLAN\u3054\u3068\u306b\u6709\u52b9\u30fb\u7121\u52b9\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6709\u52b9\u5316\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan vlan-id<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\uff1aVLAN10\u3067\u6709\u52b9\u5316\u3059\u308b\u5834\u5408<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan 10<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7121\u52b9\u5316\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# no spanning-tree vlan vlan-id<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\uff1aVLAN10\u3067\u7121\u52b9\u5316\u3059\u308b\u5834\u5408<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# no spanning-tree vlan 10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u306f\u300cVLAN\u5358\u4f4d\u3067\u5236\u5fa1\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u70b9\u3092\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PVST+\u3067\u306fVLAN\u3054\u3068\u306b\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u9078\u3079\u308b\u305f\u3081\u3001\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u3092VLAN\u3054\u3068\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan vlan-id priority priority<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN ID\uff1a1 \uff5e 4094<\/li>\n\n\n\n<li>\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024\uff1a0 \uff5e 61440\uff084096\u523b\u307f\u3067\u8a2d\u5b9a\u53ef\u80fd\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\uff1aVLAN10\u306e\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u30924096\u306b\u3059\u308b\u5834\u5408<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan 10 priority 4096<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3088\u304f\u3042\u308b\u8a2d\u8a08\u306f\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u3057\u305f\u3044\u30b9\u30a4\u30c3\u30c1<\/strong> \u2192 \u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3 0<\/li>\n\n\n\n<li><strong>\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u3057\u305f\u3044\u30b9\u30a4\u30c3\u30c1<\/strong> \u2192 \u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3 4096<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3068\u3044\u3046\u5f62\u3067\u3059\u3002\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306f\u3001\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304c\u30c0\u30a6\u30f3\u3057\u305f\u3068\u304d\u306b\u4ee3\u308f\u308a\u3092\u52d9\u3081\u308b\u5019\u88dc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cisco\u30b9\u30a4\u30c3\u30c1\u306b\u306f\u3001\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u3092\u81ea\u52d5\u8abf\u6574\u3057\u3066\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u3059\u308b\u30b3\u30de\u30f3\u30c9\u3082\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30a4\u30de\u30ea\u30fc\u30eb\u30fc\u30c8\u306b\u8a2d\u5b9a\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan vlan-id root primary<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u305d\u306e\u30b9\u30a4\u30c3\u30c1\u306f\u65e2\u5b58\u306e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3088\u308a\u5c0f\u3055\u3044\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024\u3092\u81ea\u52d5\u7684\u306b\u9078\u3073\u307e\u3059\u3002\u4f8b\u3048\u3070\u65e2\u5b58\u304c32768\u306a\u3089\u3001\u81ea\u52d5\u7684\u306b24576\u304c\u8a2d\u5b9a\u3055\u308c\u3001\u5f37\u5236\u7684\u306b\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u306b\u8a2d\u5b9a\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree vlan vlan-id root secondary<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3061\u3089\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u305d\u306e\u30b9\u30a4\u30c3\u30c1\u306e\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u306f28672\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u5024\u306f\u56fa\u5b9a\u3067\u3042\u308a\u3001\u4ed6\u306e\u30b9\u30a4\u30c3\u30c1\u306e\u8a2d\u5b9a\u72b6\u6cc1\u306b\u3088\u3063\u3066\u306f\u672c\u5f53\u306b\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u306b\u306a\u308c\u308b\u4fdd\u8a3c\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u300c\u5b9f\u904b\u7528\u3067\u306f\u975e\u63a8\u5968\u300d\u3068\u899a\u3048\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9f\u8df5\u7684\u306a\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u78ba\u5b9f\u306a\u65b9\u6cd5\u306f\u3001\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3068\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN\u3054\u3068\u306b\u300c\u30eb\u30fc\u30c8\uff1d0\u300d\u300c\u30bb\u30ab\u30f3\u30c0\u30ea\uff1d4096\u300d\u3068\u6c7a\u3081\u308b<\/li>\n\n\n\n<li>\u3059\u3079\u3066\u306e\u30ea\u30f3\u30af\u306e\u5e2f\u57df\u5e45\u304c\u540c\u3058\u5834\u5408\u3001\u6700\u7d42\u7684\u306a\u5224\u5b9a\u306f\u30d6\u30ea\u30c3\u30b8ID\uff08MAC\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8ID\uff09\u306b\u4f9d\u5b58\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3046\u3057\u3066\u304a\u3051\u3070\u3001\u969c\u5bb3\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306b\u4e88\u6e2c\u3069\u304a\u308a\u306e\u5207\u308a\u66ff\u3048\u304c\u884c\u308f\u308c\u3001\u5b89\u5b9a\u3057\u305fSTP\u306e\u904b\u7528\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a66\u9a13\u3067\u3082\u300croot primary \/ root secondary \u30b3\u30de\u30f3\u30c9\u306e\u52d5\u4f5c\u300d\u3068\u300c\u660e\u793a\u7684\u306a priority \u8a2d\u5b9a\u306e\u9055\u3044\u300d\u3092\u533a\u5225\u3057\u3066\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\uff08PVST+\uff09\uff1a\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u78ba\u8a8d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Catalyst\u30b9\u30a4\u30c3\u30c1\u3067\u30b9\u30d1\u30cb\u30f3\u30b0\u30c4\u30ea\u30fc\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\u3068\u304d\u306b\u306f\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># show spanning-tree<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3067\u8868\u793a\u3055\u308c\u308b\u60c5\u5831\u3092\u8aad\u307f\u89e3\u304f\u3053\u3068\u3067\u3001\u3069\u306e\u30b9\u30a4\u30c3\u30c1\u304c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306a\u306e\u304b\u3001\u5404\u30dd\u30fc\u30c8\u304c\u3069\u3093\u306a\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u8a66\u9a13\u3067\u306f\u51fa\u529b\u7d50\u679c\u306e\u4e00\u90e8\u3092\u793a\u3055\u308c\u3066\u300c\u3053\u306e\u30b9\u30a4\u30c3\u30c1\u306f\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304b\uff1f\u300d\u3068\u3044\u3063\u305f\u8a2d\u554f\u304c\u51fa\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u898b\u65b9\u3092\u6574\u7406\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u3067\u306f\u3001SWA\u304cVLAN1\u306b\u304a\u3044\u3066\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3068\u306a\u3063\u3066\u3044\u308b\u4f8b\u3092\u57fa\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u51fa\u529b\u9805\u76ee\u306e\u898b\u65b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u2460 <strong>VLAN ID<\/strong><br>\u3000\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u60c5\u5831\u304c\u3069\u306eVLAN\u306b\u95a2\u3059\u308b\u3082\u306e\u304b\u3092\u793a\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f VLAN1 \u306e\u60c5\u5831\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2461 <strong>STP\u30e2\u30fc\u30c9<\/strong><br>\u3000<code>ieee<\/code> \u306f PVST+\uff08\u5f93\u6765\u306eSTP\uff09\u3001<code>rstp<\/code> \u306f Rapid-PVST \u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2462 <strong>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306e\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024<\/strong><br>\u3000\u300c\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3 + VLAN ID\u300d\u306e\u5408\u8a08\u3067\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u304c0\u3067VLAN1\u306a\u3089\u300c1\u300d\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2463 <strong>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306eMAC\u30a2\u30c9\u30ec\u30b9<\/strong><br>\u3000\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u9078\u3070\u308c\u305f\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306eMAC\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u81ea\u5206\u304c\u30eb\u30fc\u30c8\u306a\u3089\u81ea\u5206\u306eMAC\u304c\u51fa\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2464 <strong>\u3053\u306e\u30b9\u30a4\u30c3\u30c1\u304c\u30eb\u30fc\u30c8\u304b\u3069\u3046\u304b<\/strong><br>\u3000\u300cThis bridge is the root\u300d\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u30b9\u30a4\u30c3\u30c1\u81ea\u8eab\u304c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2465 <strong>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304c\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3059\u308b\u5404\u7a2e\u30bf\u30a4\u30de\u30fc<\/strong><br>\u3000Hello\u30bf\u30a4\u30e0\uff08\u30c7\u30d5\u30a9\u30eb\u30c82\u79d2\uff09\u3001Forward Delay\uff0815\u79d2\uff09\u3001Max Age\uff0820\u79d2\uff09\u306a\u3069\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2466 <strong>\u81ea\u5206\u81ea\u8eab\u306e\u30d6\u30ea\u30c3\u30b8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3<\/strong><br>\u3000\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\u5024\u3068VLAN ID\u306e\u5408\u8a08\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2467 <strong>\u81ea\u5206\u81ea\u8eab\u306eMAC\u30a2\u30c9\u30ec\u30b9<\/strong><br>\u3000\u30b9\u30a4\u30c3\u30c1\u56fa\u6709\u306eMAC\u30a2\u30c9\u30ec\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2468 <strong>\u81ea\u5206\u81ea\u8eab\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30bf\u30a4\u30de\u30fc\u5024<\/strong><br>\u3000\u2465\u306e\u5024\u3068\u540c\u3058\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u304c\u3001\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u306f\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2469 <strong>MAC\u30a2\u30c9\u30ec\u30b9\u30a8\u30fc\u30b8\u30f3\u30b0\u30bf\u30a4\u30e0<\/strong><br>\u3000\u5b66\u7fd2\u3057\u305fMAC\u30a2\u30c9\u30ec\u30b9\u3092\u4fdd\u6301\u3059\u308b\u6642\u9593\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f300\u79d2\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246a <strong>\u30dd\u30fc\u30c8\u306e\u5f79\u5272\uff08Role\uff09<\/strong><br>\u3000<code>Root<\/code> = \u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u3001<code>Desg<\/code> = \u6307\u5b9a\u30dd\u30fc\u30c8\u3001<code>Altn<\/code> = \u975e\u6307\u5b9a\u30dd\u30fc\u30c8\uff08\u4ee3\u66ff\u30dd\u30fc\u30c8\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246b <strong>\u30dd\u30fc\u30c8\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\uff08State\uff09<\/strong><br>\u3000<code>FWD<\/code> = \u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u72b6\u614b\u3001<code>BLK<\/code> = \u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u72b6\u614b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246c <strong>\u30dd\u30fc\u30c8\u30b3\u30b9\u30c8<\/strong><br>\u3000\u30ea\u30f3\u30af\u901f\u5ea6\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u8a08\u7b97\u3055\u308c\u307e\u3059\u3002\u4f8b\uff1a10Gbps=2\u30011Gbps=4\u3001100Mbps=19\u300110Mbps=100\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246d <strong>\u30dd\u30fc\u30c8ID<\/strong><br>\u3000\u300c\u30dd\u30fc\u30c8\u30d7\u30e9\u30a4\u30aa\u30ea\u30c6\u30a3\uff08\u30c7\u30d5\u30a9\u30eb\u30c8128\uff09\u300d\u3068\u300c\u30dd\u30fc\u30c8\u756a\u53f7\u300d\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246e <strong>\u30dd\u30fc\u30c8\u30bf\u30a4\u30d7<\/strong><br>\u3000<code>P2p<\/code> \u306f\u30b9\u30a4\u30c3\u30c1\u9593\u63a5\u7d9a\u3001<code>Edge P2p<\/code> \u306fPortFast\u304c\u6709\u52b9\u306a\u30a8\u30c3\u30b8\u30dd\u30fc\u30c8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u246f <strong>\u30eb\u30fc\u30c8\u30d1\u30b9\u30b3\u30b9\u30c8<\/strong><br>\u3000\u305d\u306e\u30dd\u30fc\u30c8\u304b\u3089\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u307e\u3067\u306e\u5408\u8a08\u30b3\u30b9\u30c8\u5024\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2470 <strong>\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u306e\u8b58\u5225\u5b50<\/strong><br>\u3000Catalyst\u5185\u90e8\u306e\u7269\u7406\u30dd\u30fc\u30c8\u756a\u53f7\u3067\u3001\u88c5\u7f6e\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u756a\u53f7\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fb\u300c\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\uff1f\u300d\u2192 \u51fa\u529b\u5185\u306e\u300cThis bridge is the root\u300d\u3092\u63a2\u3059\u3002<br>\u30fb\u300c\u30dd\u30fc\u30c8\u306e\u5f79\u5272\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\uff1f\u300d\u2192 Role\u306e\u6b04\u3067 Root \/ Desg \/ Altn \u3092\u30c1\u30a7\u30c3\u30af\u3002<br>\u30fb\u300c\u3069\u306e\u30ea\u30f3\u30af\u304c\u4f7f\u7528\u4e2d\u304b\uff1f\u300d\u2192 State \u304c FWD \u306e\u30dd\u30fc\u30c8\u3092\u78ba\u8a8d\u3002<br><br>\u3053\u306e\u3088\u3046\u306b <code>show spanning-tree<\/code> \u306e\u7d50\u679c\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306eSTP\u52d5\u4f5c\u3092\u628a\u63e1\u3059\u308b\u9375\u3068\u306a\u308a\u307e\u3059\u3002\u8a66\u9a13\u3067\u3082\u5b9f\u969b\u306e\u8a2d\u5b9a\u78ba\u8a8d\u3067\u3082\u983b\u51fa\u306a\u306e\u3067\u3001\u5404\u9805\u76ee\u304c\u4f55\u3092\u610f\u5473\u3059\u308b\u304b\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">STP\uff08PVST+\uff09\uff1a\u30b3\u30f3\u30d0\u30fc\u30b8\u30a7\u30f3\u30b9\u306e\u9ad8\u901f\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f93\u6765\u306eIEEE 802.1D STP\u3067\u306f\u3001\u969c\u5bb3\u767a\u751f\u3084\u30ea\u30f3\u30af\u63a5\u7d9a\u6642\u306b\u6700\u592750\u79d2\u3082\u306e\u901a\u4fe1\u65ad\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3046\u306e\u304c\u5927\u304d\u306a\u8ab2\u984c\u3067\u3057\u305f\u3002\u3053\u306e\u6642\u9593\u306f <strong>\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0 \u2192 \u30ea\u30b9\u30cb\u30f3\u30b0\uff0820\u79d2\uff09 \u2192 \u30e9\u30fc\u30cb\u30f3\u30b0\uff0815\u79d2\uff09 \u2192 \u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\uff0815\u79d2\uff09<\/strong> \u3068\u3044\u3046\u9077\u79fb\u30d7\u30ed\u30bb\u30b9\u306b\u7531\u6765\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cisco\u306f\u3053\u306e\u554f\u984c\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u3001\u3044\u304f\u3064\u304b\u306e\u9ad8\u901f\u5316\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u4ee3\u8868\u304c <strong>PortFast \/ UplinkFast \/ BackboneFast<\/strong> \u306e3\u3064\u3067\u3059\u3002\u73fe\u5728\u3067\u306f\u6539\u826f\u7248\u306eRSTP\uff08Rapid PVST+\uff09\u304c\u4e3b\u6d41\u3067\u3042\u308a\u3001\u7279\u306bUplinkFast\u3084BackboneFast\u306f\u3042\u307e\u308a\u4f7f\u308f\u308c\u307e\u305b\u3093\u304c\u3001\u8a66\u9a13\u7bc4\u56f2\u3068\u3057\u3066\u306f\u7406\u89e3\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\u3001PortFast\u306f\u4eca\u3067\u3082\u73fe\u5834\u3067\u591a\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PortFast<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u306e\u30dd\u30fc\u30c8\u306f\u901a\u4fe1\u3092\u59cb\u3081\u308b\u307e\u3067\u306b\u5b66\u7fd2\u30d5\u30a7\u30fc\u30ba\u3092\u7d4c\u308b\u305f\u3081\u3001PC\u3084\u30b5\u30fc\u30d0\u3092\u63a5\u7d9a\u3059\u308b\u3068\u3059\u3050\u306b\u306f\u901a\u4fe1\u304c\u3067\u304d\u307e\u305b\u3093\u3002PortFast\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30dd\u30fc\u30c8\u306f\u3059\u3050\u306b\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u72b6\u614b\u306b\u79fb\u884c\u3057\u3001PC\u8d77\u52d5\u76f4\u5f8c\u304b\u3089\u901a\u4fe1\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e2\u7a2e\u985e\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7279\u5b9a\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u9069\u7528\uff08\u63a8\u5968\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# spanning-tree portfast<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5168\u3066\u306e\u30a2\u30af\u30bb\u30b9\u30dd\u30fc\u30c8\u306b\u4e00\u62ec\u9069\u7528\uff08\u975e\u63a8\u5968\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree portfast default<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001PortFast\u3092\u30b9\u30a4\u30c3\u30c1\u9593\u30ea\u30f3\u30af\u306a\u3069\u306b\u8aa4\u3063\u3066\u8a2d\u5b9a\u3059\u308b\u3068\u30eb\u30fc\u30d7\u3092\u5f15\u304d\u8d77\u3053\u3059\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u300c\u30db\u30b9\u30c8\u63a5\u7d9a\u306e\u30a2\u30af\u30bb\u30b9\u30dd\u30fc\u30c8\u5c02\u7528\u300d\u3068\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u6642\u306b\u306f\u8b66\u544a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u304c\u3001PC\u3084\u30b5\u30fc\u30d0\u63a5\u7d9a\u30dd\u30fc\u30c8\u3067\u3042\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">UplinkFast<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">UplinkFast\u306f\u3001\u975e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3067\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u304c\u969c\u5bb3\u306b\u3088\u308a\u4f7f\u3048\u306a\u304f\u306a\u3063\u305f\u3068\u304d\u3001\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u72b6\u614b\u306b\u3042\u3063\u305f\u5225\u306e\u30dd\u30fc\u30c8\u3092\u5373\u5ea7\u306b\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u3078\u5207\u308a\u66ff\u3048\u308b\u6a5f\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u53ce\u675f\u304c5\u79d2\u4ee5\u5185\u306b\u77ed\u7e2e\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u306f\u7c21\u5358\u3067\u3001\u6b21\u306e1\u884c\u3092\u6295\u5165\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree uplinkfast<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u3053\u306e\u6a5f\u80fd\u306f\u300c\u30eb\u30fc\u30c8\u30dd\u30fc\u30c8\u3068\u975e\u6307\u5b9a\u30dd\u30fc\u30c8\u3092\u6301\u3064\u975e\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u300d\u306b\u5bfe\u3057\u3066\u306e\u307f\u6709\u52b9\u3067\u3059\u3002\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3084\u30bb\u30ab\u30f3\u30c0\u30ea\u30fc\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u306b\u306f\u4e0d\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">BackboneFast<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BackboneFast\u306f\u300c\u9593\u63a5\u30ea\u30f3\u30af\u306e\u969c\u5bb3\u300d\u767a\u751f\u6642\u306b\u53ce\u675f\u3092\u901f\u3081\u308b\u305f\u3081\u306e\u6a5f\u80fd\u3067\u3059\u3002\u901a\u5e38\u306fMaxAge\uff0820\u79d2\uff09\u3092\u5f85\u3063\u3066\u304b\u3089\u518d\u8a08\u7b97\u306b\u5165\u308b\u305f\u3081\u53ce\u675f\u307e\u306750\u79d2\u304b\u304b\u308a\u307e\u3059\u304c\u3001BackboneFast\u3092\u6709\u52b9\u306b\u3059\u308b\u3068MaxAge\u306e\u5f85\u3061\u6642\u9593\u3092\u77ed\u7e2e\u3057\u300130\u79d2\u3067\u53ce\u675f\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u306f\u4ee5\u4e0b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# spanning-tree backbonefast<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u6a5f\u80fd\u306f <strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u5168\u30b9\u30a4\u30c3\u30c1\u306b\u8a2d\u5b9a\u304c\u5fc5\u8981<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u52d5\u4f5c\u306e\u6d41\u308c\u3092\u7c21\u5358\u306b\u6574\u7406\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9593\u63a5\u30ea\u30f3\u30af\uff08\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u3068\u5225\u306e\u30d6\u30ea\u30c3\u30b8\u9593\uff09\u304c\u5207\u65ad\u3055\u308c\u308b\u3002<\/li>\n\n\n\n<li>BPDU\u3092\u53d7\u4fe1\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u30b9\u30a4\u30c3\u30c1\u304c\u3001\u81ea\u5206\u3092\u30eb\u30fc\u30c8\u3068\u3059\u308bBPDU\uff08\u4e0b\u4f4dBPDU\uff09\u3092\u9001\u4fe1\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u305d\u308c\u3092\u53d7\u3051\u53d6\u3063\u305f\u30b9\u30a4\u30c3\u30c1\u304c\u300c\u30eb\u30fc\u30c8\u30ea\u30f3\u30af\u30af\u30a8\u30ea\uff08RLQ\uff09\u300d\u3092\u9001\u4fe1\u3057\u3001\u672c\u7269\u306e\u30eb\u30fc\u30c8\u306e\u5b58\u5728\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u30eb\u30fc\u30c8\u30d6\u30ea\u30c3\u30b8\u304c\u300cRLQ Ack\u300d\u3092\u8fd4\u3059\u3002<\/li>\n\n\n\n<li>\u5fdc\u7b54\u3092\u53d7\u3051\u305f\u30b9\u30a4\u30c3\u30c1\u306f\u300c\u30eb\u30fc\u30c8\u306f\u751f\u304d\u3066\u3044\u308b\u304c\u30c8\u30dd\u30ed\u30b8\u30fc\u306b\u5909\u5316\u3042\u308a\u300d\u3068\u5224\u65ad\u3057\u3001MaxAge\u3092\u5f85\u305f\u305a\u306b\u518d\u8a08\u7b97\u3092\u958b\u59cb\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u3053\u308c\u306b\u3088\u308a\u3001\u975e\u6307\u5b9a\u30dd\u30fc\u30c8\u304c30\u79d2\u3067\u6307\u5b9a\u30dd\u30fc\u30c8\u3078\u6607\u683c\u3057\u3001\u7d4c\u8def\u304c\u5207\u308a\u66ff\u308f\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"is-style-icon_pen 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