{"id":1696,"date":"2025-11-30T00:26:25","date_gmt":"2025-11-29T15:26:25","guid":{"rendered":"https:\/\/mylifeisbeautiful555.net\/?page_id=1696"},"modified":"2025-11-30T00:26:25","modified_gmt":"2025-11-29T15:26:25","slug":"%e3%82%a2%e3%83%88%e3%83%aa%e3%83%93%e3%83%a5%e3%83%bc%e3%83%88-origin","status":"publish","type":"page","link":"https:\/\/mylifeisbeautiful555.net\/?page_id=1696","title":{"rendered":"\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8 Origin"},"content":{"rendered":"\n

BGP \u306e origin\uff08\u30aa\u30ea\u30b8\u30f3\uff09\u5c5e\u6027<\/strong> \u306f\u3001
\u300c\u305d\u306e\u7d4c\u8def\u304c\u3069\u3053\u304b\u3089\u6765\u305f\u306e\u304b\u300d\u3092\u793a\u3059 \u7d4c\u8def\u5c5e\u6027\uff08Well-known Mandatory\uff09<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n

BGP \u3067\u306f\u5fc5\u305a\u3069\u306e\u7d4c\u8def\u306b\u3082 origin \u304c\u4ed8\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

BGP Origin \u5c5e\u6027\u3068\u306f<\/strong><\/h1>\n\n\n\n

\u7d4c\u8def\u304c\u751f\u6210\u3055\u308c\u305f\u201c\u5143\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u201d\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u5024\u306f3\u7a2e\u985e\u3057\u304b\u3042\u308a\u307e\u305b\u3093\uff1a<\/p>\n\n\n\n

\u5024<\/th>\u540d\u79f0<\/th>\u610f\u5473<\/th>\u512a\u5148\u5ea6\uff08\u4f4e\u3044\u6570\u304c\u512a\u5148\uff09<\/th><\/tr><\/thead>
i<\/strong><\/td>IGP<\/strong><\/td>\u3082\u3068\u3082\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b3\u30de\u30f3\u30c9\u3067\u751f\u6210\u3055\u308c\u305f\uff08\u5185\u90e8\u3067\u5ba3\u8a00\uff09<\/td>\u6700\u512a\u5148 (1)<\/strong><\/td><\/tr>
e<\/strong><\/td>EGP<\/strong><\/td>\u53e4\u3044\u5916\u90e8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30d7\u30ed\u30c8\u30b3\u30eb\uff08EGP\uff09\u7d4c\u7531<\/td>\u4e2d\u9593 (2)<\/strong><\/td><\/tr>
?<\/strong><\/td>Incomplete<\/strong><\/td>\u518d\u914d\u5e03\uff08redistribute\uff09\u3067\u5165\u3063\u3066\u304d\u305f<\/td>\u6700\u512a\u5148\u3055\u308c\u306a\u3044 (3)<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Origin \u304c\u3069\u3053\u3067\u6c7a\u307e\u308b\u304b<\/strong><\/h1>\n\n\n\n

\u2460 IGP\uff08i\uff09<\/strong><\/h3>\n\n\n\n

\u4ee5\u4e0b\u306e\u6642\u306b origin \u304c\u300ci\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

    \n
  • network 192.168.1.0 mask 255.255.255.0<\/code>
    \u2192 \u81ea\u5206\u3067\u300c\u3053\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u5e83\u544a\u3057\u3066\uff01\u300d\u3068\u5ba3\u8a00\u3057\u305f\u7d4c\u8def<\/strong><\/li>\n\n\n\n
  • aggregate-address \u306a\u3069\u3067\u751f\u6210\u3055\u308c\u305f\u7d4c\u8def\u3082\u300ci\u300d<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    \u2461 EGP\uff08e\uff09<\/strong><\/h3>\n\n\n\n
      \n
    • \u3053\u308c\u306f\u6614\u306e EGP \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u7531\u6765<\/li>\n\n\n\n
    • \u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f \u307b\u307c\u4f7f\u308f\u308c\u306a\u3044<\/strong><\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      \u2462 Incomplete\uff08?\uff09<\/strong><\/h3>\n\n\n\n

      \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u5225\u30d7\u30ed\u30c8\u30b3\u30eb\u304b\u3089\u7d4c\u8def\u3092\u518d\u914d\u5e03\u3057\u305f\u5834\u5408\uff1a<\/p>\n\n\n\n

        \n
      • redistribute connected<\/code><\/li>\n\n\n\n
      • redistribute static<\/code><\/li>\n\n\n\n
      • redistribute ospf 1<\/code><\/li>\n\n\n\n
      • redistribute eigrp 1<\/code><\/li>\n<\/ul>\n\n\n\n

        \u3053\u306e\u3068\u304d\u306f \u5143\u304c BGP \u3067\u306f\u306a\u3044\u305f\u3081\u3001\u3069\u3053\u304b\u3089\u6765\u305f\u304b\u308f\u304b\u3089\u306a\u3044<\/strong> \u2192\u300c?\u300d<\/p>\n\n\n\n

        Path Selection\uff08\u7d4c\u8def\u9078\u629e\uff09\u3067\u306e\u512a\u5148\u9806\u4f4d<\/strong><\/h1>\n\n\n\n

        BGP \u306e\u6c7a\u5b9a\u30d7\u30ed\u30bb\u30b9\u3067 origin \u5c5e\u6027\u306f \u304b\u306a\u308a\u5f8c\u534a\u306e\u6761\u4ef6<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n

        \u512a\u5148\u9806\u4f4d\u3068\u3057\u3066\u306f\u3053\u3093\u306a\u611f\u3058\uff1a<\/p>\n\n\n\n

          \n
        1. weight\uff08Cisco\u72ec\u81ea\uff09<\/li>\n\n\n\n
        2. local preference<\/li>\n\n\n\n
        3. locally originated\uff08network\/aggregate\/static\uff09<\/li>\n\n\n\n
        4. AS-PATH \u9577\u3055<\/li>\n\n\n\n
        5. origin type\uff08i \u304c\u5f37\u3044\uff0c? \u304c\u5f31\u3044<\/strong>\uff09<\/li>\n\n\n\n
        6. MED<\/li>\n\n\n\n
        7. eBGP > iBGP<\/li>\n\n\n\n
        8. IGP metric
          \u2026 \u306a\u3069\u7d9a\u304f<\/li>\n<\/ol>\n\n\n\n

          Origin \u306f AS-PATH \u3088\u308a\u5f8c\u3001MED \u3088\u308a\u524d\u3002<\/p>\n\n\n\n

          \u5b9f\u969b\u306e show \u30b3\u30de\u30f3\u30c9\u4f8b<\/strong><\/h1>\n\n\n\n
          R1# show ip bgp 10.10.10.0\nBGP routing table entry for 10.10.10.0\/24, version 12\nPaths: (2 available)\n  65001 65002\n    192.0.2.2 (metric 0) from 192.0.2.2 (1.1.1.1)\n      Origin IGP, localpref 100, valid, external\n\n  65001 65003\n    203.0.113.3 (metric 0) from 203.0.113.3 (2.2.2.2)\n      Origin incomplete, localpref 100, valid, external\n<\/code><\/pre>\n\n\n\n
          \u2192 Origin IGP<\/code> \u306e\u7d4c\u8def\u304c\u512a\u5148\u3055\u308c\u308b\u3002<\/p>\n\n\n\n
          \u307e\u3068\u3081<\/strong><\/h1>\n\n\n\n
            \n
          • BGP origin \u306f \u7d4c\u8def\u751f\u6210\u5143<\/strong> \u3092\u793a\u3059\u5c5e\u6027<\/li>\n\n\n\n
          • 3\u7a2e\u985e\uff1ai\uff08IGP\uff09 > e\uff08EGP\uff09 > ?\uff08Incomplete\uff09<\/strong><\/li>\n\n\n\n
          • network \u30b3\u30de\u30f3\u30c9\u306f\u300ci\u300d\u3001\u518d\u914d\u5e03\u306f\u300c?\u300d<\/li>\n\n\n\n
          • \u7d4c\u8def\u9078\u629e\u3067\u306f origin \u304c\u5c0f\u3055\u3044\u307b\u3069\u512a\u5148<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
            BGP \u306e origin\uff08\u30aa\u30ea\u30b8\u30f3\uff09\u5c5e\u6027 \u306f\u3001\u300c\u305d\u306e\u7d4c\u8def\u304c\u3069\u3053\u304b\u3089\u6765\u305f\u306e\u304b\u300d\u3092\u793a\u3059 \u7d4c\u8def\u5c5e\u6027\uff08Well-known Mandatory\uff09 \u3067\u3059\u3002 BGP \u3067\u306f\u5fc5\u305a\u3069\u306e\u7d4c\u8def\u306b\u3082 origin \u304c\u4ed8\u304d\u307e\u3059\u3002 BGP Orig […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1696","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1696","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1696"}],"version-history":[{"count":1,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1696\/revisions"}],"predecessor-version":[{"id":1697,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1696\/revisions\/1697"}],"wp:attachment":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}