{"id":477724,"date":"2023-08-09T09:19:17","date_gmt":"2023-08-09T09:19:17","guid":{"rendered":""},"modified":"2023-09-05T11:15:17","modified_gmt":"2023-09-05T11:15:17","slug":"is-is","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/is-is\/","title":{"rendered":"IS-IS"},"content":{"rendered":"<p>IS-IS (Intermediate System to Intermediate System) \u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30c7\u30d0\u30a4\u30b9 (\u30eb\u30fc\u30bf\u30fc) \u304c\u30c7\u30fc\u30bf \u30d1\u30b1\u30c3\u30c8\u3092\u8ee2\u9001\u3059\u308b\u6700\u9069\u306a\u65b9\u6cd5\u3092\u6c7a\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u30ea\u30f3\u30af\u72b6\u614b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u4e3b\u306b\u5927\u898f\u6a21\u3067\u8907\u96d1\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3067\u4f7f\u7528\u3055\u308c\u3001OSI (Open Systems Interconnection) \u30e2\u30c7\u30eb\u5185\u3067\u6a19\u6e96\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>IS-IS\u306e\u8d77\u6e90\u3068\u305d\u306e\u6700\u521d\u306e\u8a00\u53ca\u306e\u6b74\u53f2<\/h2>\n<p>IS-IS \u306f\u5f53\u521d\u3001OSI \u30e2\u30c7\u30eb\u306e\u4e00\u90e8\u3068\u3057\u3066 ISO 10589 \u3067\u5b9a\u7fa9\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5411\u3051\u306e\u5805\u7262\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u5fc5\u8981\u6027\u304c\u660e\u3089\u304b\u306b\u306a\u3063\u305f 1980 \u5e74\u4ee3\u5f8c\u534a\u306b\u751f\u307e\u308c\u307e\u3057\u305f\u3002IS-IS \u306f\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u30d7\u30ed\u30c8\u30b3\u30eb (RIP) \u306a\u3069\u306e\u4ee5\u524d\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3088\u308a\u3082\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u4ee3\u66ff\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u30011990 \u5e74\u306b RFC 1195 \u3067 IP \u74b0\u5883\u306b\u9069\u5fdc\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>IS-IS \u306b\u95a2\u3059\u308b\u8a73\u7d30\u60c5\u5831: \u30c8\u30d4\u30c3\u30af IS-IS \u306e\u62e1\u5f35<\/h2>\n<p>IS-IS \u306f OSI \u30e2\u30c7\u30eb\u306e\u30ec\u30a4\u30e4\u30fc 2 (\u30c7\u30fc\u30bf \u30ea\u30f3\u30af\u5c64) \u3067\u52d5\u4f5c\u3057\u3001\u3055\u307e\u3056\u307e\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3067\u304d\u307e\u3059\u3002\u30ea\u30f3\u30af\u72b6\u614b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u30d1\u30b1\u30c3\u30c8\u8ee2\u9001\u306b\u6700\u9069\u306a\u30d1\u30b9\u3092\u8a08\u7b97\u3057\u3001IPv4 \u3068 IPv6 \u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>IS-IS \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/h3>\n<ul>\n<li><strong>\u30ce\u30fc\u30c9<\/strong>: \u4e2d\u9593\u30b7\u30b9\u30c6\u30e0 (IS) \u3068\u30a8\u30f3\u30c9\u30b7\u30b9\u30c6\u30e0 (ES) \u306b\u5206\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30d1\u30b1\u30c3\u30c8 (LSP)<\/strong>: \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c8\u30dd\u30ed\u30b8\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u5171\u6709\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u30a8\u30ea\u30a2<\/strong>: \u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3092\u5bb9\u6613\u306b\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u968e\u5c64\u7684\u306a\u6307\u5b9a\u3002<\/li>\n<li><strong>\u30ec\u30d9\u30eb<\/strong>: 2 \u3064\u306e\u968e\u5c64\u30ec\u30d9\u30eb - \u30ec\u30d9\u30eb 1 (\u30a8\u30ea\u30a2\u5185) \u3068\u30ec\u30d9\u30eb 2 (\u30a8\u30ea\u30a2\u9593)\u3002<\/li>\n<\/ul>\n<h3>\u30d7\u30ed\u30c8\u30b3\u30eb\u64cd\u4f5c<\/h3>\n<p>IS-IS \u30eb\u30fc\u30bf\u306f\u30cd\u30a4\u30d0\u30fc\u3092\u691c\u51fa\u3057\u3001\u60c5\u5831\u3092\u4ea4\u63db\u3057\u3001\u30c0\u30a4\u30af\u30b9\u30c8\u30e9 \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u3059\u3079\u3066\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5b9b\u5148\u3078\u306e\u6700\u77ed\u30d1\u30b9\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<h2>IS-IS \u306e\u5185\u90e8\u69cb\u9020: IS-IS \u306e\u4ed5\u7d44\u307f<\/h2>\n<p>IS-IS \u306e\u52d5\u4f5c\u306f\u30012 \u3064\u306e\u968e\u5c64\u30ec\u30d9\u30eb\u3068\u3055\u307e\u3056\u307e\u306a\u30e1\u30c3\u30bb\u30fc\u30b8 \u30bf\u30a4\u30d7\u3092\u901a\u3058\u3066\u7406\u89e3\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>\u8fd1\u96a3\u63a2\u7d22<\/strong>: Hello \u30d1\u30b1\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u8fd1\u96a3\u95a2\u4fc2\u3092\u691c\u51fa\u3057\u3001\u7dad\u6301\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 (LSDB) \u306e\u69cb\u7bc9<\/strong>: \u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8 \u30d1\u30b1\u30c3\u30c8 (LSP) \u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u304a\u3088\u3073\u7ba1\u7406\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u6700\u77ed\u7d4c\u8def\u512a\u5148\uff08SPF\uff09\u8a08\u7b97<\/strong>: \u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5229\u7528\u3057\u3066\u6700\u9069\u306a\u30d1\u30b9\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<h3>\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u7a2e\u985e<\/h3>\n<ul>\n<li><strong>\u30cf\u30ed\u30fc\u30d1\u30b1\u30c3\u30c8<\/strong>: \u8fd1\u96a3\u63a2\u7d22\u3068\u95a2\u4fc2\u7dad\u6301\u306e\u305f\u3081\u3002<\/li>\n<li><strong>LSP<\/strong>: \u30c8\u30dd\u30ed\u30b8\u60c5\u5831\u3092\u5171\u6709\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u5b8c\u5168\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u30d1\u30b1\u30c3\u30c8 (CSNP)<\/strong> \u305d\u3057\u3066 <strong>\u90e8\u5206\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u30d1\u30b1\u30c3\u30c8 (PSNP)<\/strong>: \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u540c\u671f\u7528\u3002<\/li>\n<\/ul>\n<h2>IS-IS\u306e\u4e3b\u306a\u7279\u5fb4\u306e\u5206\u6790<\/h2>\n<ul>\n<li><strong>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3<\/strong>: \u968e\u5c64\u69cb\u9020\u306e\u305f\u3081\u3001\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u67d4\u8edf\u6027<\/strong>: \u8907\u6570\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u5805\u7262\u6027<\/strong>: \u8fc5\u901f\u306a\u53ce\u675f\u3068\u5b89\u5b9a\u6027\u3002<\/li>\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u6210<\/strong>: \u69cb\u6210\u306e\u8907\u96d1\u3055\u304c\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>IS-IS \u306e\u7a2e\u985e: \u30c6\u30fc\u30d6\u30eb\u3068\u30ea\u30b9\u30c8\u306e\u4f7f\u7528<\/h2>\n<h3>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30ec\u30d9\u30eb<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u30ec\u30d9\u30eb<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u30ec\u30d9\u30eb1<\/td>\n<td>\u30a8\u30ea\u30a2\u5185\uff08\u30a8\u30ea\u30a2\u5185\uff09\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30ec\u30d9\u30eb2<\/td>\n<td>\u30a8\u30ea\u30a2\u9593\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff08\u30a8\u30ea\u30a2\u9593\uff09\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb<\/h3>\n<ul>\n<li>IPv4<\/li>\n<li>IPv6<\/li>\n<li>IPX (\u5c65\u6b74)<\/li>\n<\/ul>\n<h2>IS-IS\u306e\u4f7f\u3044\u65b9\u3001\u4f7f\u7528\u4e0a\u306e\u554f\u984c\u70b9\u3068\u305d\u306e\u89e3\u6c7a\u7b56<\/h2>\n<p>IS-IS \u306f\u3001\u5927\u898f\u6a21\u306a\u4f01\u696d\u3084 ISP \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u6b21\u306e\u3088\u3046\u306a\u8ab2\u984c\u304c\u306a\u3044\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>\u554f\u984c\u70b9<\/h3>\n<ul>\n<li>\u975e\u5e38\u306b\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u8907\u96d1\u3055\u3002<\/li>\n<li>\u8aa4\u3063\u3066\u69cb\u6210\u3055\u308c\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30eb\u30fc\u30d7\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/h3>\n<ul>\n<li>\u9069\u5207\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u3068\u30bb\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3002<\/li>\n<li>\u5b9a\u671f\u7684\u306a\u76e3\u8996\u304a\u3088\u3073\u8a3a\u65ad\u30c4\u30fc\u30eb\u3002<\/li>\n<\/ul>\n<h2>\u4e3b\u306a\u7279\u5fb4\u3068\u985e\u4f3c\u7528\u8a9e\u3068\u306e\u6bd4\u8f03<\/h2>\n<h3>OSPF\u3068\u306e\u6bd4\u8f03<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7279\u5fb4<\/th>\n<th>IS-IS<\/th>\n<th>OSPF<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>OSI \u5c64<\/td>\n<td>\u30ec\u30a4\u30e4\u30fc2<\/td>\n<td>\u30ec\u30a4\u30e4\u30fc3<\/td>\n<\/tr>\n<tr>\n<td>\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30b5\u30dd\u30fc\u30c8<\/td>\n<td>\u30de\u30eb\u30c1\u30d7\u30ed\u30c8\u30b3\u30eb<\/td>\n<td>IPv4\u3001IPv6<\/td>\n<\/tr>\n<tr>\n<td>\u69cb\u6210<\/td>\n<td>\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b<\/td>\n<td>\u3088\u308a\u8907\u96d1\u306a<\/td>\n<\/tr>\n<tr>\n<td>\u30a8\u30ea\u30a2\u30bf\u30a4\u30d7<\/td>\n<td>\u57fa\u672c\u7684\u306a\u968e\u5c64<\/td>\n<td>\u3055\u307e\u3056\u307e\u306a\u30a8\u30ea\u30a2\u30bf\u30a4\u30d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>IS-IS\u306b\u95a2\u3059\u308b\u5c06\u6765\u306e\u5c55\u671b\u3068\u6280\u8853<\/h2>\n<p>IS-IS \u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u304a\u3044\u3066\u7d99\u7d9a\u7684\u306b\u6539\u5584\u3055\u308c\u3001\u5c06\u6765\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308a\u7d9a\u3051\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/strong>: \u8a8d\u8a3c\u3068\u6697\u53f7\u5316\u306e\u5f37\u5316\u3002<\/li>\n<li><strong>SDN\u3068\u306e\u7d71\u5408<\/strong>: \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u5b9a\u7fa9\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u306e\u30b3\u30e9\u30dc\u30ec\u30fc\u30b7\u30e7\u30f3\u3002<\/li>\n<li><strong>\u65b0\u3057\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30b5\u30dd\u30fc\u30c8<\/strong>: \u65b0\u8208\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6280\u8853\u3078\u306e\u9069\u5fdc\u3002<\/li>\n<\/ul>\n<h2>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u306e\u4f7f\u7528\u65b9\u6cd5\u3084 IS-IS \u3068\u306e\u95a2\u9023\u4ed8\u3051\u65b9\u6cd5<\/h2>\n<p>\u4e00\u90e8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30f3\u30c4 \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u30ed\u30b0\u8a18\u9332\u306a\u3069\u306e\u7279\u5b9a\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u3001\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u304c IS-IS \u3068\u3068\u3082\u306b\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3092 IS-IS \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u7d71\u5408\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u3088\u308a\u7d71\u4e00\u7684\u306b\u5b9f\u65bd\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.iso.org\/standard\/68959.html\" target=\"_new\" rel=\"noopener nofollow\">ISO 10589: \u60c5\u5831\u6280\u8853 - \u96fb\u6c17\u901a\u4fe1\u304a\u3088\u3073\u60c5\u5831\u4ea4\u63db<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc1195\" target=\"_new\" rel=\"noopener nofollow\">RFC 1195: TCP\/IP \u304a\u3088\u3073\u30c7\u30e5\u30a2\u30eb\u74b0\u5883\u3067\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b OSI IS-IS \u306e\u4f7f\u7528<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/ip\/intermediate-system-to-intermediate-system-is-is\/13713-22.html\" target=\"_new\" rel=\"noopener nofollow\">Cisco \u306e IS-IS \u30ac\u30a4\u30c9<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/jp\/\" target=\"_new\" rel=\"noopener\">OneProxy\u516c\u5f0f\u30b5\u30a4\u30c8<\/a><\/li>\n<\/ul>\n<p>\u3053\u306e\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9\u306f\u3001\u591a\u7528\u9014\u3067\u5805\u7262\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30d7\u30ed\u30c8\u30b3\u30eb IS-IS\u3001\u305d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u8ab2\u984c\u3001\u304a\u3088\u3073\u5c06\u6765\u306e\u958b\u767a\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u51fa\u767a\u70b9\u3068\u306a\u308a\u307e\u3059\u3002OneProxy \u304c\u63d0\u4f9b\u3059\u308b\u3088\u3046\u306a\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u306b\u3088\u308a\u3001\u6700\u65b0\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30b7\u30ca\u30ea\u30aa\u306b\u304a\u3051\u308b\u53ef\u80fd\u6027\u304c\u3055\u3089\u306b\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>","protected":false},"featured_media":477725,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477724","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Intermediate System to Intermediate System (IS-IS)<\/mark>","faq_items":[{"question":"What is IS-IS and how does it work?","answer":"<p>IS-IS, which stands for Intermediate System to Intermediate System, is a link-state routing protocol used by routers to determine the best path for forwarding data packets in large and complex network environments. It operates on Layer 2 (Data Link Layer) of the OSI model and can support both IPv4 and IPv6. IS-IS routers discover neighbors, exchange information, and use the Dijkstra algorithm to calculate the shortest path to all network destinations.<\/p>"},{"question":"How did IS-IS originate?","answer":"<p>IS-IS was initially defined in ISO 10589 as part of the OSI model in the late 1980s. It was developed to provide a more scalable alternative to earlier routing protocols like RIP. In 1990, it was adapted to IP environments with RFC 1195.<\/p>"},{"question":"What are the key features of IS-IS?","answer":"<p>IS-IS offers several important features, including scalability for large networks, flexibility in supporting multiple network layer protocols, robustness with quick convergence, and simplicity in configuration.<\/p>"},{"question":"What are the different types of IS-IS?","answer":"<p>IS-IS operates with two hierarchical levels: Level 1 for routing within an area (intra-area) and Level 2 for routing between areas (inter-area). It also supports multiple network protocols, including IPv4, IPv6, and IPX (historical).<\/p>"},{"question":"How is IS-IS compared to OSPF?","answer":"<p>While both IS-IS and OSPF are link-state routing protocols, they have some differences. IS-IS operates at Layer 2 of the OSI model, while OSPF operates at Layer 3. IS-IS supports multi-protocol environments, while OSPF primarily focuses on IPv4 and IPv6. IS-IS configuration is generally simpler compared to OSPF's more complex setup.<\/p>"},{"question":"How can proxy servers be associated with IS-IS?","answer":"<p>Proxy servers can be used alongside IS-IS in certain network architectures to enhance performance and security. By integrating proxy servers with IS-IS routing, specific functionalities like content filtering, caching, and logging can be provided, optimizing network operations.<\/p>"},{"question":"What are the future prospects of IS-IS?","answer":"<p>The future of IS-IS is promising, with continuous improvements in security measures, integration with SDN (Software-Defined Networking), and support for emerging network protocols and technologies.<\/p>"},{"question":"Where can I find more information about IS-IS?","answer":"<p>For further information about IS-IS, you can refer to the ISO standard 10589 and RFC 1195. Additionally, Cisco offers a comprehensive guide to IS-IS, and you can explore OneProxy's website for more networking solutions and resources.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477724\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/477725"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=477724"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}