{"id":23180,"date":"2026-10-28T11:37:19","date_gmt":"2026-10-28T03:37:19","guid":{"rendered":"https:\/\/www.luleey.com\/?p=23180"},"modified":"2026-10-24T11:40:44","modified_gmt":"2026-10-24T03:40:44","slug":"25g-fec-mismatch-why-an-sfp28-link-stays-down","status":"publish","type":"post","link":"https:\/\/www.luleey.com\/ja\/25g-fec-mismatch-why-an-sfp28-link-stays-down\/","title":{"rendered":"25G FEC\u306e\u4e0d\u4e00\u81f4\uff1aSFP28\u30ea\u30f3\u30af\u304c\u30c0\u30a6\u30f3\u3057\u305f\u307e\u307e\u306b\u306a\u308b\u7406\u7531"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-b469f63b\">A <strong>25G <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/fec\/\" title=\"FEC\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">FEC<\/a> \u4e0d\u4e00\u81f4<\/strong> \uff5e\u3092\u7dad\u6301\u3067\u304d\u308b <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/sfp28\/\" title=\"SFP28\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">SFP28<\/a> \u4e21\u65b9\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u691c\u51fa\u3055\u308c\u3001\u30d5\u30a1\u30a4\u30d0\u30fc\u304c\u63a5\u7d9a\u3055\u308c\u3001\u53d7\u4fe1\u5149\u30d1\u30ef\u30fc\u3082\u59a5\u5f53\u306a\u5024\u3092\u793a\u3057\u3066\u3044\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30ea\u30f3\u30af\u304c\u30c0\u30a6\u30f3\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u300225GbE\u3067\u306f\u30012\u3064\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304c\u901f\u5ea6\u3060\u3051\u3067\u306a\u304f\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u524d\u65b9\u8aa4\u308a\u8a02\u6b63\uff08FEC\uff09\u30e2\u30fc\u30c9\u306b\u3064\u3044\u3066\u3082\u3001\u4f7f\u7528\u3059\u308bPHY\u3001\u4f1d\u9001\u5a92\u4f53\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u5b8c\u5168\u306b\u4e92\u63db\u6027\u304c\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0cb348d6\">\u307e\u305a\u5149\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4ea4\u63db\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u4e21\u7aef\u3067\u8a2d\u5b9a\u6e08\u307f\u304b\u3064\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u308bFEC\u3092\u8a18\u9332\u3057\u3001\u30dd\u30fc\u30c8\u304c\u5b9f\u969b\u306b1\u3064\u306e25G\u30ec\u30fc\u30f3\u3067\u52d5\u4f5c\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u3001\u6a5f\u5668\u306e\u53d6\u6271\u8aac\u660e\u66f8\u306b\u57fa\u3065\u3044\u3066\u30011\u304b\u6240\u306e\u307f\u3092\u614e\u91cd\u306b\u5909\u66f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-caa71302\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-23182\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/25g-fec-mismatch-hero-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-bec86812\">25G FEC\u306e\u30df\u30b9\u30de\u30c3\u30c1\uff1a\u7c21\u6f54\u306a\u7b54\u3048<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7272a461\">FEC\u306f\u3001\u53d7\u4fe1\u5074\u304c\u4e00\u90e8\u306e\u30d3\u30c3\u30c8\u30a8\u30e9\u30fc\u3092\u8a02\u6b63\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u9001\u4fe1\u524d\u306b\u5197\u9577\u60c5\u5831\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u53d7\u4fe1\u5074\u306f\u3001\u3053\u308c\u306b\u5bfe\u5fdc\u3057\u305f\u30c7\u30b3\u30fc\u30c0\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3042\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304c <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/rs-fec\/\" title=\"RS-FEC\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">RS-FEC<\/a> \u4e00\u65b9\u3001\u3082\u3046\u4e00\u65b9\u306f\u671f\u5f85\u3057\u3066\u3044\u308b <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/base-r-fec\/\" title=\"BASE-R FEC \u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">BASE-R FEC<\/a> FEC\u304c\u306a\u3044\u5834\u5408\u3001\u53d7\u4fe1\u6a5f\u306fFEC\/PCS\u30ed\u30c3\u30af\u3092\u53d6\u5f97\u3067\u304d\u305a\u3001\u30ea\u30f3\u30af\u304c\u30c0\u30a6\u30f3\u3057\u305f\u307e\u307e\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e2\u30fc\u30c9<\/th><th>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u898b\u3089\u308c\u308b\u305d\u306e\u4ed6\u306e\u30e9\u30d9\u30eb<\/th><th>\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>RS-FEC<\/td><td>\u30ea\u30fc\u30c9\u30fb\u30bd\u30ed\u30e2\u30f3FEC\uff1b25G <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/clause-108\/\" title=\"\u7b2c108\u6761\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\u3059\u308b\">\u7b2c108\u6761<\/a>; \u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u7b2c91\u6761\u306b\u57fa\u3065\u304f\u30e9\u30d9\u30eb\u304c\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308b<\/td><td>\u4e00\u90e8\u306e25G PHY\uff0f\u30e1\u30c7\u30a3\u30a2\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u304a\u3044\u3066\u3001\u3088\u308a\u5927\u5e45\u306a\u4fee\u6b63\u304c\u5fc5\u8981\u3068\u306a\u308b\u3001\u3042\u308b\u3044\u306f\u4e88\u60f3\u3055\u308c\u308b<\/td><\/tr><tr><td>BASE-R FEC<\/td><td>Firecode\u3001FC-FEC\u3001, <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/clause-74\/\" title=\"\u7b2c74\u6761\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">\u7b2c74\u6761<\/a><\/td><td>RS-FEC\u3068\u306f\u7570\u306a\u308b\u30b3\u30fc\u30c9\u3067\u3042\u308a\u3001\u3053\u306e2\u3064\u306f\u4e92\u63db\u6027\u304c\u306a\u3044<\/td><\/tr><tr><td>FEC\u306a\u3057<\/td><td>\u30aa\u30d5\u3001\u306a\u3057<\/td><td>\u6b63\u78ba\u306aPHY\u3001\u4f1d\u9001\u5a92\u4f53\u3001\u304a\u3088\u3073\u4e21\u7aef\u70b9\u304c\u3053\u308c\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u306e\u307f\u6709\u52b9\u3067\u3059<\/td><\/tr><tr><td>\u81ea\u52d5\u8eca<\/td><td>FEC\u30aa\u30fc\u30c8<\/td><td>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u4eee\u5b9a\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u5b9f\u969b\u306e\u7d50\u679c\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8963ed28\">\u5358\u4e00\u8eca\u7dda\u306e\u5834\u5408 <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/25g-ethernet\/\" title=\"\u300c25G\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u300d\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">25G\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8<\/a>, IEEE\u898f\u683c\u3067\u306f\u3001RS-FEC\u30b5\u30d6\u30ec\u30a4\u30e4\u30fc\u3092 <strong>\u7b2c108\u6761<\/strong>. \u4e00\u90e8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u306f\u300125G\u30b3\u30fc\u30c9\u304c\u4ee5\u524d\u306eRS-FEC\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u7531\u6765\u3059\u308b\u3053\u3068\u304b\u3089\u3001\u300cClause 91\u300d\u3068\u3044\u3046\u7565\u79f0\u304c\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092 <code>RS-FEC<\/code> \u53e5\u756a\u53f7\u3092\u30b3\u30de\u30f3\u30c9\u306b\u5272\u308a\u5f53\u3066\u308b\u524d\u306b\u3001\u9069\u5207\u306a\u95a2\u6570\u540d\u3092\u78ba\u8a8d\u3057\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u7167\u5408\u3057\u3066\u304f\u3060\u3055\u3044\u3002IEEE\u306e\u30ef\u30fc\u30ad\u30f3\u30b0\u30b0\u30eb\u30fc\u30d7\u8cc7\u6599\u3067\u3082\u300125GBASE-SR\u306fRS-FEC\u306e\u9069\u7528\u4f8b\u3068\u3057\u3066\u6319\u3052\u3089\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-db589676\">\u516c\u5f0f <a href=\"https:\/\/www.ieee802.org\/3\/by\/public\/Mar15\/slavick_3by_02a_0315.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">IEEE P802.3by \u30bf\u30b9\u30af\u30d5\u30a9\u30fc\u30b9\u306e\u8cc7\u6599<\/a> \u3042\u308b\u6c4e\u7528\u8a2d\u5b9a\u304c\u5b89\u5168\u3067\u306a\u3044\u7406\u7531\u3092\u6b21\u306e\u3088\u3046\u306b\u793a\u3057\u3066\u3044\u307e\u3059\u300225GBASE-SR\u306fRS-FEC\u3092\u524d\u63d0\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u9285\u7dda\u3084\u30d0\u30c3\u30af\u30d7\u30ec\u30fc\u30f3\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3001\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u308bFEC\u3084\u3001\u8a2d\u8a08\u4e0aFEC\u306a\u3057\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u6b63\u3057\u3044\u9078\u629e\u306f\u3001SFP28\u306e\u30b7\u30a7\u30eb\u3067\u306f\u306a\u304f\u3001\u30ea\u30f3\u30af\u5168\u4f53\u306b\u57fa\u3065\u3044\u3066\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-c05db179\">\u306a\u305c\u300c\u81ea\u52d5\u300d\u3067\u306f\u5fc5\u305a\u3057\u3082\u89e3\u6c7a\u3057\u306a\u3044\u306e\u304b<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0b8eebfc\">\u201c\u300cAuto\u300d\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u610f\u5473\u3092\u6301\u3064\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306b\u53c2\u52a0\u3059\u308b\u5834\u5408\u3082\u3042\u308c\u3070\u3001\u30c9\u30e9\u30a4\u30d0\u304c\u691c\u51fa\u3055\u308c\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u3084\u30b1\u30fc\u30d6\u30eb\u304b\u3089\u30ed\u30fc\u30ab\u30ebFEC\u30e2\u30fc\u30c9\u3092\u9078\u629e\u3059\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u540c\u3058\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-82031f7f\">\u306b\u3064\u3044\u3066 <a href=\"https:\/\/cdn.kernel.org\/doc\/html\/latest\/networking\/ethtool-netlink.html?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">Linux \u30ab\u30fc\u30cd\u30eb\u306e ethtool \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a> \u8a2d\u5b9a\u6e08\u307f\u306eFEC\u30e2\u30fc\u30c9\u3001\u81ea\u52d5\u30ed\u30fc\u30ab\u30eb\u9078\u629e\u3001\u304a\u3088\u3073\u30a2\u30af\u30c6\u30a3\u30d6\u306aFEC\u30e2\u30fc\u30c9\u3092\u533a\u5225\u3057\u307e\u3059\u3002\u307e\u305f\u3001FEC\u306e\u7d71\u8a08\u60c5\u5831\u3082\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u30c7\u30d0\u30a4\u30b9\u3067\u306f\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30e2\u30fc\u30c9\u306e\u5831\u544a\u3092\u7701\u7565\u3067\u304d\u308b\u305f\u3081\u3001 <code>\u6709\u52b9\u306aFEC\uff1a\u306a\u3057<\/code> \u30c0\u30a6\u30f3\u30ea\u30f3\u30af\u4e0a\u3067\u3042\u308b\u3068\u3044\u3046\u4e8b\u5b9f\u3060\u3051\u3067\u306f\u3001\u4e21\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304c\u610f\u56f3\u7684\u306bFEC\u306a\u3057\u3092\u9078\u629e\u3057\u305f\u8a3c\u62e0\u306b\u306f\u306a\u3089\u306a\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7faca307\">\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306f\u3001\u30c9\u30e9\u30a4\u30d0\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001\u307e\u305f\u306f\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u306b\u3088\u3063\u3066\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u306e\u7aef\u304c RS-FEC \u306e\u307e\u307e\u3067\u3082\u3001\u3082\u3046\u4e00\u65b9\u306e\u7aef\u304c BASE-R \u307e\u305f\u306f\u300c\u30aa\u30d5\u300d\u306b\u5909\u66f4\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u3084\u30b1\u30fc\u30d6\u30eb\u306e\u4f4d\u7f6e\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u4ee5\u524d\u306f\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u305f\u30ea\u30f3\u30af\u304c\u5931\u6557\u3057\u3066\u3057\u307e\u3046\u7406\u7531\u3067\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-094028f2\">FEC\u306fSFP28\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u3088\u3063\u3066\u5236\u5fa1\u3055\u308c\u3066\u3044\u307e\u3059\u304b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-64e13abb\">\u5f93\u6765\u306e\u900f\u660e\u578bSFP28\u5149\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u306f\u3001FEC\u306f\u901a\u5e38\u3001\u30db\u30b9\u30c8\u5074\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306ePCS\u30ed\u30b8\u30c3\u30af\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u7b26\u53f7\u5316\u3055\u308c\u305f\u30b7\u30ea\u30a2\u30eb\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f1d\u9001\u3059\u308b\u306e\u307f\u3067\u30012\u3064\u306e\u30b9\u30a4\u30c3\u30c1\u9593\u3067FEC\u306b\u95a2\u3059\u308b\u5408\u610f\u3092\u72ec\u81ea\u306b\u5f62\u6210\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a4fd5b11\">\u30a2\u30af\u30c6\u30a3\u30d6\u30b1\u30fc\u30d6\u30eb\u3001\u30ea\u30bf\u30a4\u30df\u30f3\u30b0\u30e2\u30b8\u30e5\u30fc\u30eb\u3001\u30a2\u30c0\u30d7\u30bf\u3001\u304a\u3088\u3073\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306b\u3088\u3063\u3066\u5236\u7d04\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u3053\u308c\u306f\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u95a2\u3059\u308b\u666e\u904d\u7684\u306a\u30eb\u30fc\u30eb\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5b89\u5168\u306a\u4e92\u63db\u6027\u60c5\u5831\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u5185\u5bb9\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30a4\u30c3\u30c1\u307e\u305f\u306fNIC\u306e\u6b63\u78ba\u306a\u30e2\u30c7\u30eb\u540d\u3001\u30dd\u30fc\u30c8\u3001\u304a\u3088\u3073\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30ea\u30d3\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001\u30c9\u30e9\u30a4\u30d0\u3001\u304a\u3088\u3073\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u30dd\u30fc\u30c8\u901f\u5ea6\u3001\u30ec\u30fc\u30f3\u30e2\u30fc\u30c9\u307e\u305f\u306f\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u30e2\u30fc\u30c9<\/li>\n\n\n\n<li>\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u3001DAC\u3001AOC\u3001\u307e\u305f\u306f\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u6b63\u78ba\u306a\u90e8\u54c1\u756a\u53f7\u304a\u3088\u3073\u30ea\u30d3\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u30ea\u30e2\u30fc\u30c8\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304a\u3088\u3073\u305d\u306e\u8a2d\u5b9a\u6e08\u307f\u304b\u3064\u30a2\u30af\u30c6\u30a3\u30d6\u306aFEC<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u7a2e\u985e\u3001\u6ce2\u9577\u3001\u504f\u6ce2\u3001\u8ddd\u96e2\u3001\u5149\u51fa\u529b\u3001\u307e\u305f\u306f\u9285\u30b1\u30fc\u30d6\u30eb\u306e\u9577\u3055<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b447855c\">\u7269\u7406\u7684\u306a\u9069\u5408\u6027\u3068\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u691c\u51fa\u306f\u3001\u7ba1\u7406\u30d1\u30b9\u304c\u6a5f\u80fd\u3059\u308b\u3053\u3068\u306e\u307f\u3092\u8a3c\u660e\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u4e92\u63db\u6027\u306e\u3042\u308b25G PCS\u30e2\u30fc\u30c9\u3084FEC\u30e2\u30fc\u30c9\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u95a2\u9023\u3059\u308bLuLeey\u30ac\u30a4\u30c9\u3067\u306f\u3001, <a href=\"https:\/\/www.luleey.com\/ja\/sfp-auto-negotiation-do-modules-select-speed\/?utm_source=chatgpt.com\">SFP\u306e\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\uff1a\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u901a\u4fe1\u901f\u5ea6\u3092\u9078\u629e\u3059\u308b\u306e\u304b\uff1f<\/a>, \u305d\u3053\u3067\u306f\u305d\u306e\u5206\u96e2\u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8a73\u3057\u304f\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e9f3f84b\">25G FEC\u306e\u30df\u30b9\u30de\u30c3\u30c1\u306b\u95a2\u3059\u308b\u5b89\u5168\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u624b\u9806<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4.png\" alt=\"\" class=\"wp-image-23181\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/10\/image-4-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-97c6700d\">1. \u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-024b4800\">\u4e21\u65b9\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3067\u300110G\u3001100G\u306e\u89aa\u30e2\u30fc\u30c9\u3001\u307e\u305f\u306f\u4e88\u671f\u3057\u306a\u3044\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u5b50\u30e2\u30fc\u30c9\u3067\u306f\u306a\u304f\u300125GbE\u30ec\u30fc\u30f3\u304c1\u3064\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8a2d\u5b9a\u901f\u5ea6\u3068\u5b9f\u969b\u306e\u52d5\u4f5c\u901f\u5ea6\u3092\u5225\u3005\u306b\u8a18\u9332\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f684fa37\">2. \u4e21\u7aef\u306eFEC\u3092\u8aad\u307f\u53d6\u308b<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a65c186f\">\u4f55\u304b\u3092\u5909\u66f4\u3059\u308b\u524d\u306b\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3001\u8a2d\u5b9a\u6e08\u307f\u3067\u3001\u304b\u3064\u30a2\u30af\u30c6\u30a3\u30d6\u306aFEC\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308bLinux\u30c9\u30e9\u30a4\u30d0\u3067\u306f\u3001\u8aad\u307f\u53d6\u308a\u5c02\u7528\u306e\u30c1\u30a7\u30c3\u30af\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ethtool --show-fec<\/code><\/pre>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3ae2f0f1\">\u4ed6\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u7570\u306a\u308b\u30b3\u30de\u30f3\u30c9\u3084\u30e9\u30d9\u30eb\u304c\u4f7f\u7528\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u304a\u4f7f\u3044\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u6b63\u78ba\u306a\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3064\u3044\u3066\u306f\u3001\u30de\u30cb\u30e5\u30a2\u30eb\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ea\u30f3\u30af\u304c\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30e2\u30fc\u30c9\u3084\u8a2d\u5b9a\u6e08\u307f\u306e\u30e2\u30fc\u30c9\u3001\u304a\u3088\u3073\u5831\u544a\u3055\u308c\u3066\u3044\u308b\u30a2\u30af\u30c6\u30a3\u30d6\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1f7017f5\">3. \u30e1\u30c7\u30a3\u30a2\u304c\u4f55\u3092\u6c42\u3081\u3066\u3044\u308b\u304b\u3092\u628a\u63e1\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e8dac2a1\">\u30db\u30b9\u30c8\u304a\u3088\u3073\u30e2\u30b8\u30e5\u30fc\u30eb\u3001\u3042\u308b\u3044\u306f\u30b1\u30fc\u30d6\u30eb\u306e\u53d6\u6271\u8aac\u660e\u66f8\u3092\u6b63\u78ba\u306b\u8aad\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u7570\u306a\u308b\u4f1d\u9001\u8ddd\u96e2\u3084\u30e1\u30c7\u30a3\u30a2\u30bf\u30a4\u30d7\u306b\u95a2\u3059\u308b\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u300225GBASE-SR\u5149\u30ea\u30f3\u30af\u3068\u3001\u77ed\u8ddd\u96e2\u306e\u5c02\u7528\u8a2d\u8a08DAC\u30ea\u30f3\u30af\u3067\u306f\u3001\u5fc5\u305a\u3057\u3082\u540c\u3058FEC\u30dd\u30ea\u30b7\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-92adf3f6\">\u3042\u308b\u5f53\u5c40\u8005 <a href=\"https:\/\/edc.intel.com\/content\/www\/us\/en\/design\/products\/ethernet\/adapters-and-devices-user-guide\/forward-error-correction-fec-mode\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">Intel \u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30a2\u30c0\u30d7\u30bf\u306e\u30ac\u30a4\u30c9<\/a> \u300cAuto\u300d\u3001\u300cRS-FEC \u7b2c108\u6761\u300d\u3001\u300cBASE-R \u7b2c74\u6761\u300d\u3001\u304a\u3088\u3073\u300cFEC\u306a\u3057\u300d\u3092\u500b\u5225\u306e\u9078\u629e\u80a2\u3068\u3057\u3066\u5217\u6319\u3057\u3001\u6dfb\u4ed8\u30e1\u30c7\u30a3\u30a2\u306b\u5fdc\u3058\u3066\u5229\u7528\u53ef\u80fd\u306a\u69cb\u6210\u3092\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-6a760464\">4. \u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u671f\u9593\u5185\u306b\u4e21\u7aef\u70b9\u3092\u4e00\u81f4\u3055\u305b\u308b<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph 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class=\"wp-block-wd-paragraph wd-adf76758\">\u3053\u306e\u7d50\u679c\u306f\u3001FEC\u306e\u4e0d\u4e00\u81f4\u3068\u3044\u3046\u8a3a\u65ad\u3092\u88cf\u4ed8\u3051\u308b\u3082\u306e\u3067\u3059\u3002\u3082\u3057\u30ea\u30f3\u30af\u304c\u30c0\u30a6\u30f3\u3057\u305f\u307e\u307e\u3060\u3063\u305f\u5834\u5408\u3001\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u5149\u8def\u306e\u78ba\u8a8d\u3067\u3042\u308a\u3001\u3055\u3089\u306b4\u3064\u306e\u8a2d\u5b9a\u3092\u7121\u4f5c\u70ba\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a7475439\">\u5b9f\u8df5\u7684\u306a\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph 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