{"id":4174,"date":"2026-02-09T08:25:22","date_gmt":"2026-02-08T23:25:22","guid":{"rendered":"http:\/\/daimaru-tech-blog.com\/?p=4174"},"modified":"2026-02-09T21:11:15","modified_gmt":"2026-02-09T12:11:15","slug":"2-9%e6%8a%95%e7%a8%bf%e4%ba%88%e5%ae%9a%e3%80%90bgp%e5%85%a5%e9%96%80%e3%80%91bgp%e3%81%ae%e5%9f%ba%e6%9c%ac%e8%a8%ad%e5%ae%9a%e3%82%92%e5%ad%a6%e3%82%93%e3%81%a7%e3%81%bf%e3%82%88%e3%81%86","status":"publish","type":"post","link":"https:\/\/daimaru-tech-blog.com\/?p=4174","title":{"rendered":"\u3010BGP\u5165\u9580\u3011BGP\u306e\u57fa\u672c\u8a2d\u5b9a\u3092\u5b66\u3093\u3067\u307f\u3088\u3046"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p>\u3053\u3093\u306b\u3061\u306f\u3002<strong><span class=\"swl-inline-color has-swl-deep-02-color\"><span class=\"swl-marker mark_blue\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u300c\u3060\u3044\u307e\u308b\u300d<\/span><\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4eca\u56de\u306f\u3001<strong>\u4eca\u307e\u3067\u5b66\u3093\u3067\u304d\u305fBGP\u306e\u57fa\u672c\u3092\u5b9f\u6a5f\u3092\u4f7f\u3063\u3066\u78ba\u8a8d\u3057\u3001\u7406\u89e3\u3092\u6df1\u3081\u3066\u3044\u304d\u305f\u3044<\/strong>\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u7406\u89e3\u306b\u306f\u3001\u5b9f\u6a5f\u78ba\u8a8d\u304c\u4e00\u756a\u65e9\u3044\uff01<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"p-blogParts post_content\" data-partsID=\"3910\">\n<center>\n    <div class=\"product-banner-container\">\n        <div class=\"image-section\">\n            <img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/81RO+wECc0L._SY425_.jpg\"  class=\"product-main-image\">\n        <\/div>\n        <div class=\"content-section\">\n            <div class=\"product-title\">\u4e16\u754c\u4e00\u6d41\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u601d\u8003\u6cd5<\/div>\n            <div class=\"product-subtitle\">\u301cMicrosoft\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u8a9e\u308b\u4e00\u6d41\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u306f\uff1f\u301c<\/div>\n            <div class=\"button-row\">            \n                <a href=\"https:\/\/amzn.to\/4qPQH6e\" target=\"_blank\" class=\"buy-button amazon\">\n                    Amazon\u3067\u898b\u308b\n                <\/a>\n                <a href=\"\/\/af.moshimo.com\/af\/c\/click?a_id=3735106&#038;p_id=54&#038;pc_id=54&#038;pl_id=616&#038;url=https%3A%2F%2Fbooks.rakuten.co.jp%2Frb%2F17649922%2F%3Fl-id%3Dsearch-c-item-text-01\" target=\"_blank\" class=\"buy-button rakuten\">\n                    \u697d\u5929\u3067\u898b\u308b\n                <\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/center>\n\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">\u691c\u8a3c\u69cb\u6210<\/h2>\n\n\n\n<p>\u4eca\u56de\u3001\u5b9f\u6a5f\u78ba\u8a8d\u3067\u7528\u3044\u308b\u306e\u306fEVE-NG\u3067\u69cb\u7bc9\u3057\u305f\u4ee5\u4e0b\u306e\u69cb\u6210\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div 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&lt;mxGeometry x=\\&quot;909\\&quot; y=\\&quot;460\\&quot; width=\\&quot;80\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-20\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-8\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-9\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;768\\&quot; y=\\&quot;347\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;920\\&quot; y=\\&quot;435\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-21\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=0;exitDx=0;exitDy=0;exitPerimeter=0;entryX=0;entryY=0.322;entryDx=0;entryDy=0;entryPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-8\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-6\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;768\\&quot; y=\\&quot;517\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;920\\&quot; y=\\&quot;435\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-22\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-1\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-7\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;729\\&quot; y=\\&quot;490\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;730\\&quot; y=\\&quot;369\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-23\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-3\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-8\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;488\\&quot; y=\\&quot;347\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;690\\&quot; y=\\&quot;347\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-24\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=0;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;entryX=0.5;entryY=1;entryDx=0;entryDy=0;entryPerimeter=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-3\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-1\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;488\\&quot; y=\\&quot;517\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;690\\&quot; y=\\&quot;517\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-25\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-4\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-1\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;449\\&quot; y=\\&quot;490\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;449\\&quot; y=\\&quot;373\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-26\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-4\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-3\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;329\\&quot; y=\\&quot;435\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;410\\&quot; y=\\&quot;347\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-27\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;\\&quot; parent=\\&quot;1\\&quot; source=\\&quot;ixuwpoIWPNPj1oIpzHQ4-5\\&quot; target=\\&quot;ixuwpoIWPNPj1oIpzHQ4-4\\&quot; edge=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;329\\&quot; y=\\&quot;435\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;410\\&quot; y=\\&quot;517\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-28\\&quot; value=\\&quot;192.168.1.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;556\\&quot; y=\\&quot;308\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-29\\&quot; value=\\&quot;192.168.2.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;556\\&quot; y=\\&quot;510\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-30\\&quot; value=\\&quot;10.1.0.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;460\\&quot; y=\\&quot;398.5\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-31\\&quot; value=\\&quot;10.2.0.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;640\\&quot; y=\\&quot;398.5\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-32\\&quot; value=\\&quot;10.2.1.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;827\\&quot; y=\\&quot;338\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-33\\&quot; value=\\&quot;10.2.2.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;827\\&quot; y=\\&quot;480\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-34\\&quot; value=\\&quot;10.1.1.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;290\\&quot; y=\\&quot;333\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-35\\&quot; value=\\&quot;10.1.2.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;290\\&quot; y=\\&quot;506\\&quot; width=\\&quot;60\\&quot; height=\\&quot;27\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-36\\&quot; value=\\&quot;10.1.3.0\/30\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;170\\&quot; y=\\&quot;371.5\\&quot; width=\\&quot;60\\&quot; height=\\&quot;27\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-37\\&quot; value=\\&quot;Lo0:10.10.X.1\/32\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;230\\&quot; y=\\&quot;243\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;ixuwpoIWPNPj1oIpzHQ4-38\\&quot; value=\\&quot;Lo0:10.20.X.1\/32\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; parent=\\&quot;1\\&quot; vertex=\\&quot;1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;850\\&quot; y=\\&quot;240\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n      &lt;\/root&gt;\\n    &lt;\/mxGraphModel&gt;\\n  &lt;\/diagram&gt;\\n&lt;\/mxfile&gt;\\n&quot;}\"><\/div>\n<script type=\"text\/javascript\" src=\"https:\/\/viewer.diagrams.net\/js\/viewer-static.min.js\"><\/script><\/center>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><span style=\"color:#0000ff\" class=\"swl-inline-color\"><strong>\u30eb\u30fc\u30bf\u306e\u82e5\u756a\u304c\u5c0f\u3055\u3044IP\u30a2\u30c9\u30ec\u30b9\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/strong><\/span><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u3053\u306e\u69cb\u6210\u306e\u7406\u7531\u306f\u3001<strong>\u300ciBGP\u300d\u3001\u300ceBGP\u300d\u3001\u300cNetwork\u6587\u306b\u3088\u308b\u7d4c\u8def\u5e83\u5831\u300d\u306e3\u3064\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306bAS\u30922\u3064\u3001\u540c\u3058AS\u5185\u306b\u8907\u6570\u306e\u30eb\u30fc\u30bf\u3092\u69cb\u7bc9<\/strong>\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n<div class=\"p-blogParts post_content\" data-partsID=\"4119\">\n<center>\n    <div class=\"product-banner-container\">\n        <div class=\"image-section\">\n            <img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/81QKoBCDcQL._SY522_.jpg\"  class=\"product-main-image\">\n        <\/div>\n        <div class=\"content-section\">\n            <div class=\"product-title\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u5165\u9580 \u7b2c3\u7248<\/div>\n            <div class=\"product-subtitle\">\u301c\u56f3\u89e3\u3067\u308f\u304b\u308b\u7d4c\u8def\u5236\u5fa1\u306e\u4ed5\u7d44\u307f!\u301c<\/div>\n            <div class=\"button-row\">            \n                <a href=\"https:\/\/amzn.to\/45pa1OI\" target=\"_blank\" class=\"buy-button amazon\">\n                    Amazon\u3067\u898b\u308b\n                <\/a>\n                 <a href=\"\/\/af.moshimo.com\/af\/c\/click?a_id=3969798&#038;p_id=56&#038;pc_id=56&#038;pl_id=637&#038;url=https%3A%2F%2Fbooks.rakuten.co.jp%2Frk%2Ffb4921254778391d9235bc09de5ab723%2F%3FvariantId%3Dfb4921254778391d9235bc09de5ab723\" target=\"_blank\" class=\"buy-button rakuten\">\n                    \u697d\u5929\u3067\u898b\u308b\n                <\/a>\n\n            <\/div>\n        <\/div>\n    <\/div>\n<\/center>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u969b\u306b\u52d5\u4f5c\u78ba\u8a8d\u3092\u3057\u3066\u307f\u3088\u3046\uff01<\/h2>\n\n\n\n<p>\u5148\u7a0b\u3082\u5c11\u3057\u89e6\u308c\u307e\u3057\u305f\u304c\u3001\u4eca\u56de\u306f\u4ee5\u4e0b\u306e\u8868\u306b\u8a18\u8f09\u306e3\u9805\u76ee\u306b\u3064\u3044\u3066\u5b9f\u6a5f\u78ba\u8a8d\u3092\u5b9f\u65bd\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-swl-pale-04-background-color has-background\"><thead style=\"--thead-color--bg:#0000ff;--thead-color--txt:var(--swl-text_color--white)\"><tr><th>No<\/th><th>\u9805\u76ee<\/th><th>\u78ba\u8a8d\u5185\u5bb9<\/th><\/tr><\/thead><tbody><tr><td><strong>1<\/strong><\/td><td>iBGP\u306e\u8a2d\u5b9a<\/td><td>iBGP\u306e\u8a2d\u5b9a\u3068\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/td><\/tr><tr><td><strong>2<\/strong><\/td><td>eBGP\u306e\u8a2d\u5b9a<\/td><td>eBGP\u306e\u8a2d\u5b9a\u3068\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/td><\/tr><tr><td><strong>3<\/strong><\/td><td>Network\u6587\u306b\u3088\u308b\u7d4c\u8def\u5e83\u5831\u306e\u8a2d\u5b9a<\/td><td>AS\u5185\u5916\u3078\u306e\u7d4c\u8def\u5e83\u5831\u3068\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u9805\u76ee\u2460\uff1aiBGP\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p>\u6700\u521d\u306e\u8a2d\u5b9a\u3068\u78ba\u8a8d\u306f\u3001<strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u540c\u4e00AS\u5185\u306b\u5b58\u5728\u3059\u308b\u30eb\u30fc\u30bf\u3067\u8a2d\u5b9a\u3059\u308b\u300ciBGP\u300d<\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u300c<strong>iBGP<\/strong>\u300d\u306f\u3001<strong>\u540c\u3058AS\u306b\u5c5e\u3059\u308b\u5168\u30eb\u30fc\u30bf\u3067\u30d4\u30a2\u3092\u5f35\u308a\u5408\u3046\u300c\u30d5\u30eb\u30e1\u30c3\u30b7\u30e5\u69cb\u6210\u300d\u306b\u3059\u308b\u5fc5\u8981<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u305d\u306e\u624b\u9593\u3092\u7701\u304f\u305f\u3081\u306b\u30eb\u30fc\u30c8\u30ea\u30d5\u30ec\u30af\u30bf\u3092\u4f7f\u3046\u5834\u5408\u3082\u3042\u308a\u307e\u3059\uff01<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u3068\u306a\u308b\u30b3\u30de\u30f3\u30c9<\/h4>\n\n\n\n<p>BGP\u304b\u3064iBGP\u30d4\u30a2\u306e\u305f\u3081\u306e\u57fa\u672c\u3068\u306a\u308b\u8a2d\u5b9a\u306f\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\"> router bgp <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;AS\u756a\u53f7&gt;<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">bgp router-id <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;BGP\u30eb\u30fc\u30bfID\u3068\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9&gt;<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5148IP\u30a2\u30c9\u30ec\u30b9&gt;<\/span><span style=\"color:#00ff00\" class=\"swl-inline-color\"> remote-as <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5148\u306eAS\u756a\u53f7&gt;<\/span> <span style=\"color:#ffff00\" class=\"swl-inline-color\">*iBGP\u306e\u5834\u5408\uff1a\u540c\u4e00AS\u756a\u53f7<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;IP\u30a2\u30c9\u30ec\u30b9&gt;<\/span><span style=\"color:#00ff00\" class=\"swl-inline-color\"> update-source <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5143\u3068\u306a\u308bInterface&gt;<\/span><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u30ed\u30b0<\/h4>\n\n\n\n<p>\u5b9f\u969b\u306b\u5b9f\u6a5f\u306b\u6295\u5165\u3057\u305fConfig\u306e\u4e00\u4f8b\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router1#<span style=\"color:#00ff00\" class=\"swl-inline-color\">conf t<\/span>\nEnter configuration commands, one per line.  End with CNTL\/Z.\nRouter1(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">router bgp <strong>100<\/strong><\/span>\nRouter1(config-router)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <strong>10.10.3.1<\/strong> remote-as <strong>100<\/strong><\/span>\nRouter1(config-router)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <strong>10.10.3.1<\/strong> update-source <strong>loopback 0<\/strong><\/span><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u72b6\u614b\u78ba\u8a8d<\/h4>\n\n\n\n<p>iBGP\u30d4\u30a2\u306e\u8a2d\u5b9a\u5f8c\u306f\u3001\u5b9f\u969b\u306b\u30d4\u30a2\u304c\u78ba\u7acb\u3067\u304d\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u300cshow ip bgp summary\u300d\u3067\u78ba\u8a8d\u3067\u304d\u3001\u30cd\u30a4\u30d0\u30fc\u3054\u3068\u306eAS\u756a\u53f7\u3084Version\u3001BGP\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u6570\u3001Up\/Down\u6642\u9593\u3084\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/strong><\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">BGP\u30d4\u30a2\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u305f\u3044\u306a\u3089\u3053\u306e\u30b3\u30de\u30f3\u30c9\u304c\u4e00\u822c\u7684\u3060\u3068\u601d\u3044\u307e\u3059\uff01<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router1#<span style=\"color:#00ff00\" class=\"swl-inline-color\">show ip bgp summary<\/span>\nBGP router identifier 10.10.1.1, local AS number 100\nBGP table version is 1, main routing table version 1\n\n<strong>Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up\/Down  State\/PfxRcd\n10.10.2.1       4          100      19      18        1    0    0 00:13:21        0\n10.10.3.1       4          100       6       4        1    0    0 00:02:44        0\n10.10.4.1       4          100       2       2        1    0    0 00:00:35        0<\/strong>\nRouter1#<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n\n<p>Router1\u3068Router2\u9593\u3067iBGP\u30d4\u30a2\u3092\u78ba\u7acb\u3057\u305f\u6642\u306e\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u5b9f\u65bd\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u6700\u521d\u306bRouter1\uff0810.10.1.1\uff09\u3068Router2\uff0810.10.2.1\uff09\u3092\u9001\u4fe1\u5143\u3068\u3057\u305fOPEN\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u305d\u308c\u305e\u308c\u9001\u4fe1\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u78ba\u7acb\u5f8c\u306b\u306fKEEPALIVE\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image is-style-border\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"393\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x393.png\" alt=\"\" class=\"wp-image-4193\" srcset=\"https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x393.png 1024w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-300x115.png 300w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-768x295.png 768w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1536x590.png 1536w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-2048x787.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>OPEN\u30e1\u30c3\u30bb\u30fc\u30b8\u306eOptional Parameters\u3092\u898b\u3066\u3044\u304f\u3068AS\u756a\u53f7\uff08100\uff09\u306a\u306e\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image is-style-border\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"853\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e32-1024x853.png\" alt=\"\" class=\"wp-image-4194\" srcset=\"https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e32-1024x853.png 1024w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e32-300x250.png 300w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e32-768x640.png 768w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_iBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e32.png 1390w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"p-blogParts post_content\" data-partsID=\"3947\">\n<center>\n    <div class=\"product-banner-container\">\n        <div class=\"image-section\">\n            <img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/81NJEtw7LNL._SY425_.jpg\"  class=\"product-main-image\">\n        <\/div>\n        <div class=\"content-section\">\n            <div class=\"product-title\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u6559\u79d1\u66f8<\/div>\n            <div class=\"product-subtitle\">\u301c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u76ee\u6307\u3059\u4eba\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u306a\u3063\u305f\u3070\u304b\u308a\u306e\u4eba\u306b\u304a\u3059\u3059\u3081\u306e1\u518a\u301c<\/div>\n            <div class=\"button-row\">            \n                <a href=\"https:\/\/amzn.to\/49Dogm0\" target=\"_blank\" class=\"buy-button amazon\">\n                    Amazon\u3067\u898b\u308b\n                <\/a>\n                <a href=\"\/\/af.moshimo.com\/af\/c\/click?a_id=3735106&#038;p_id=54&#038;pc_id=54&#038;pl_id=616&#038;url=https%3A%2F%2Fbooks.rakuten.co.jp%2Frb%2F17442328%2F%3Fl-id%3Dsearch-c-item-text-01\" target=\"_blank\" class=\"buy-button rakuten\">\n                    \u697d\u5929\u3067\u898b\u308b\n                <\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/center>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">\u9805\u76ee\u2461\uff1aeBGP\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p>\u6b21\u306b\u78ba\u8a8d\u3059\u308b\u306e\u306f\u3001<strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u5916\u90e8AS\u306b\u5b58\u5728\u3059\u308b\u30eb\u30fc\u30bf\u3068\u63a5\u7d9a\u3092\u884c\u3046\u300ceBGP\u300d<\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u300c<strong>eBGP<\/strong>\u300d\u306e\u8a2d\u5b9a\u306f\u3001<strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u300ciBGP\u300d\u3068\u57fa\u672c\u7684\u306b\u540c\u3058\u8a2d\u5b9a<\/span><\/strong>\u306b\u306a\u308a\u3001<strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u300c\u63a5\u7d9a\u5148\u306eAS\u756a\u53f7\u300d\u3067\u5224\u5225<\/span><\/strong>\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"red\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#ff0000\" class=\"swl-inline-color\">eBGP\u3067\u306f\u30eb\u30fc\u30c8\u30ea\u30d5\u30ec\u30af\u30bf\u3092\u57fa\u672c\u7684\u306b\u306f\u5229\u7528\u3057\u307e\u305b\u3093<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u3068\u306a\u308b\u30b3\u30de\u30f3\u30c9<\/h4>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\"> router bgp <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;AS\u756a\u53f7&gt;<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">bgp router-id <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;BGP\u30eb\u30fc\u30bfID\u3068\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9&gt;<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5148IP\u30a2\u30c9\u30ec\u30b9&gt;<\/span><span style=\"color:#00ff00\" class=\"swl-inline-color\"> remote-as <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5148\u306eAS\u756a\u53f7&gt;<\/span> <span style=\"color:#ffff00\" class=\"swl-inline-color\">*eBGP\u306e\u5834\u5408\uff1a\u7570\u306a\u308bAS\u756a\u53f7<\/span>\n(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;IP\u30a2\u30c9\u30ec\u30b9&gt;<\/span><span style=\"color:#00ff00\" class=\"swl-inline-color\"> update-source <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;\u63a5\u7d9a\u5143\u3068\u306a\u308bInterface&gt;<\/span><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u30ed\u30b0<\/h4>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router1(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\"> router bgp 100<\/span>\nRouter1(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 192.168.1.2 remote-as 200<\/span>\nRouter1(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 192.168.1.2 update-source gigabitEthernet 0\/3<\/span><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router5(config)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">router bgp 200<\/span>\nRouter5(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 192.168.1.1 remote-as 100<\/span>\nRouter1(config-router)# <span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 192.168.1.2 update-source gigabitEthernet 0\/3<\/span><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u72b6\u614b\u78ba\u8a8d<\/h4>\n\n\n\n<p>\u8a2d\u5b9a\u3067\u306f\u300cremote-as\u300d\u3067\u6307\u5b9a\u3059\u308bAS\u756a\u53f7\u304c\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u300ceBGP\u300d\u3068\u3057\u3066\u5224\u65ad\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u300cshow ip bgp summary\u300d\u3067\u306f\u3001AS\u756a\u53f7\u3092\u898b\u3066\u5224\u65ad\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router1#<span style=\"color:#00ff00\" class=\"swl-inline-color\">show ip bgp summary<\/span>\nBGP router identifier 10.10.1.1, local AS number 100\nBGP table version is 1, main routing table version 1\n\nNeighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up\/Down  State\/PfxRcd\n10.10.2.1       4          100     139     139        1    0    0 02:04:06        0\n10.10.3.1       4          100      14      15        1    0    0 00:11:46        0\n10.10.4.1       4          100      15      14        1    0    0 00:11:37        0\n<span style=\"color:#ffff00\" class=\"swl-inline-color\">192.168.1.2     4          200      11      11        1    0    0 00:06:32        0<\/span><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n<div class=\"wp-block-image is-style-border\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"623\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x623.png\" alt=\"\" class=\"wp-image-4198\" style=\"aspect-ratio:1.6413529763770554;width:811px;height:auto\" srcset=\"https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x623.png 1024w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-300x183.png 300w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-768x467.png 768w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1536x935.png 1536w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_eBGP\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-2048x1246.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"p-blogParts post_content\" data-partsID=\"3963\">\n<center><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-2776062481390161\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:block\"\n     data-ad-client=\"ca-pub-2776062481390161\"\n     data-ad-slot=\"2830301217\"\n     data-ad-format=\"auto\"\n     data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/center>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">\u9805\u76ee\u2462\uff1aNetwork\u6587\u306b\u3088\u308b\u7d4c\u8def\u5e83\u5831\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p>\u6700\u5f8c\u306b\u78ba\u8a8d\u3059\u308b\u306e\u306f\u3001<strong>Network\u6587\u306b\u3088\u308b\u7d4c\u8def\u5e83\u5831\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u305f\u3044<\/strong>\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8\u306f\u300c<strong>\u30eb\u30fc\u30bf4<\/strong>\u300d\u3068\u300c<strong>\u30eb\u30fc\u30bf7<\/strong>\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u30eb\u30fc\u30bf\u3067<strong>Loopback\u3092\u5e83\u5831\u3057\u78ba\u8a8d<\/strong>\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<center><div class=\"mxgraph\" style=\"max-width:100%;border:1px solid transparent;\" data-mxgraph=\"{&quot;highlight&quot;:&quot;#0000ff&quot;,&quot;lightbox&quot;:false,&quot;nav&quot;:true,&quot;resize&quot;:true,&quot;toolbar&quot;:&quot;zoom layers tags&quot;,&quot;edit&quot;:&quot;_blank&quot;,&quot;xml&quot;:&quot;&lt;mxfile host=\\&quot;Electron\\&quot; modified=\\&quot;2026-01-19T00:42:59.847Z\\&quot; agent=\\&quot;Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit\/537.36 (KHTML, like Gecko) draw.io\/21.6.5 Chrome\/114.0.5735.243 Electron\/25.3.1 Safari\/537.36\\&quot; etag=\\&quot;aoVd6mYcsrsGZbjnmMHd\\&quot; version=\\&quot;21.6.5\\&quot; type=\\&quot;device\\&quot;&gt;\\n  &lt;diagram name=\\&quot;\u3010\u57fa\u672c\u8a2d\u5b9a\u3011Network\u6587\u78ba\u8a8d\\&quot; id=\\&quot;M1mZzWFyc-pxOUlfJoVf\\&quot;&gt;\\n    &lt;mxGraphModel dx=\\&quot;2608\\&quot; dy=\\&quot;674\\&quot; grid=\\&quot;1\\&quot; gridSize=\\&quot;10\\&quot; guides=\\&quot;1\\&quot; tooltips=\\&quot;1\\&quot; connect=\\&quot;1\\&quot; arrows=\\&quot;1\\&quot; fold=\\&quot;1\\&quot; page=\\&quot;1\\&quot; pageScale=\\&quot;1\\&quot; pageWidth=\\&quot;1654\\&quot; pageHeight=\\&quot;1169\\&quot; math=\\&quot;0\\&quot; shadow=\\&quot;0\\&quot;&gt;\\n      &lt;root&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-0\\&quot; \/&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-0\\&quot; \/&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-2\\&quot; value=\\&quot;\\&quot; style=\\&quot;rounded=0;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#0000FF;strokeWidth=2;dashed=1;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;120\\&quot; y=\\&quot;240\\&quot; width=\\&quot;320\\&quot; height=\\&quot;370\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-3\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;400\\&quot; y=\\&quot;310\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-4\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;400\\&quot; y=\\&quot;480\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-5\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;241\\&quot; y=\\&quot;398.5\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-6\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;80\\&quot; y=\\&quot;398.5\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-7\\&quot; value=\\&quot;\\&quot; style=\\&quot;rounded=0;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#006600;strokeWidth=2;dashed=1;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;720\\&quot; y=\\&quot;240\\&quot; width=\\&quot;380\\&quot; height=\\&quot;370\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-8\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;exitPerimeter=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;entryPerimeter=0;strokeWidth=2;endArrow=none;endFill=0;\\&quot; edge=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot; source=\\&quot;id1fpr6UEJ7B1mXhDqTN-9\\&quot; target=\\&quot;id1fpr6UEJ7B1mXhDqTN-11\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-9\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;680\\&quot; y=\\&quot;310\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-10\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;680\\&quot; y=\\&quot;480\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-11\\&quot; value=\\&quot;\\&quot; style=\\&quot;shape=mxgraph.cisco.routers.router;sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;910\\&quot; y=\\&quot;398.5\\&quot; width=\\&quot;78\\&quot; height=\\&quot;53\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-12\\&quot; value=\\&quot;&amp;lt;font style=&amp;quot;font-size: 20px;&amp;quot;&amp;gt;&amp;lt;b&amp;gt;AS100&amp;lt;\/b&amp;gt;&amp;lt;\/font&amp;gt;\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;129\\&quot; y=\\&quot;243\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-13\\&quot; value=\\&quot;&amp;lt;font style=&amp;quot;font-size: 20px;&amp;quot;&amp;gt;&amp;lt;b&amp;gt;AS200&amp;lt;\/b&amp;gt;&amp;lt;\/font&amp;gt;\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=right;verticalAlign=middle;whiteSpace=wrap;rounded=0;\\&quot; 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y=\\&quot;371.5\\&quot; width=\\&quot;60\\&quot; height=\\&quot;27\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-38\\&quot; value=\\&quot;Lo0:10.10.X.1\/32\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;230\\&quot; y=\\&quot;243\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;id1fpr6UEJ7B1mXhDqTN-39\\&quot; value=\\&quot;Lo0:10.20.X.1\/32\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;850\\&quot; y=\\&quot;240\\&quot; width=\\&quot;60\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;YJrxVKDlMzkpjzjqZ7aY-0\\&quot; value=\\&quot;Lo0: 10.10.4.1\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;-20\\&quot; y=\\&quot;368\\&quot; width=\\&quot;110\\&quot; height=\\&quot;27\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;YJrxVKDlMzkpjzjqZ7aY-1\\&quot; value=\\&quot;Lo0: 10.20.7.1\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;975\\&quot; y=\\&quot;368\\&quot; width=\\&quot;110\\&quot; height=\\&quot;27\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;YJrxVKDlMzkpjzjqZ7aY-2\\&quot; style=\\&quot;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=0;exitDx=0;exitDy=0;exitPerimeter=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;entryPerimeter=0;strokeWidth=4;startArrow=classic;startFill=1;strokeColor=#FF0000;dashed=1;\\&quot; edge=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry relative=\\&quot;1\\&quot; as=\\&quot;geometry\\&quot;&gt;\\n            &lt;mxPoint x=\\&quot;120\\&quot; y=\\&quot;440\\&quot; as=\\&quot;sourcePoint\\&quot; \/&gt;\\n            &lt;mxPoint x=\\&quot;950\\&quot; y=\\&quot;440\\&quot; as=\\&quot;targetPoint\\&quot; \/&gt;\\n          &lt;\/mxGeometry&gt;\\n        &lt;\/mxCell&gt;\\n        &lt;mxCell id=\\&quot;YJrxVKDlMzkpjzjqZ7aY-3\\&quot; value=\\&quot;Network\u6587\u3067\u4e92\u3044\u306b\u5e83\u5831\\&quot; style=\\&quot;text;html=1;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=16;fontStyle=1;fontColor=#FF0000;\\&quot; vertex=\\&quot;1\\&quot; parent=\\&quot;id1fpr6UEJ7B1mXhDqTN-1\\&quot;&gt;\\n          &lt;mxGeometry x=\\&quot;478\\&quot; y=\\&quot;440\\&quot; width=\\&quot;210\\&quot; height=\\&quot;30\\&quot; as=\\&quot;geometry\\&quot; \/&gt;\\n        &lt;\/mxCell&gt;\\n      &lt;\/root&gt;\\n    &lt;\/mxGraphModel&gt;\\n  &lt;\/diagram&gt;\\n&lt;\/mxfile&gt;\\n&quot;}\"><\/div>\n<script type=\"text\/javascript\" src=\"https:\/\/viewer.diagrams.net\/js\/viewer-static.min.js\"><\/script><\/center>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u3068\u306a\u308b\u30b3\u30de\u30f3\u30c9<\/h4>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\"> router bgp <\/span><span style=\"color:#ffff00\" class=\"swl-inline-color\">&lt;AS\u756a\u53f7&gt;<\/span>\n(config-router)# network &lt;\u5e83\u5831\u3059\u308bPrefix\/IP\u30a2\u30c9\u30ec\u30b9&gt; mask X.X.X.X\uff08Prefix\u9577\uff09<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u30ed\u30b0<\/h4>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router4(config)#router bgp 100\nRouter4(config-router)#network 10.10.4.1 mask 255.255.255.255<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u72b6\u614b\u78ba\u8a8d<\/h4>\n\n\n\n<p>\u30eb\u30fc\u30bf7\u3067\u4e8b\u524d\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router7#<span style=\"color:#00ff00\" class=\"swl-inline-color\">show ip route<\/span>\nCodes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP\n       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area\n       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2\n       E1 - OSPF external type 1, E2 - OSPF external type 2\n       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2\n       ia - IS-IS inter area, * - candidate default, U - per-user static route\n       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP\n       a - application route\n       + - replicated route, % - next hop override, p - overrides from PfR\n\nGateway of last resort is not set\n\n      10.0.0.0\/8 is variably subnetted, 8 subnets, 2 masks\nO        10.2.0.0\/30 &#91;110\/2] via 10.2.2.1, 02:14:03, GigabitEthernet0\/3\n                     &#91;110\/2] via 10.2.1.1, 02:14:03, GigabitEthernet0\/2\nC        10.2.1.0\/30 is directly connected, GigabitEthernet0\/2\nL        10.2.1.2\/32 is directly connected, GigabitEthernet0\/2\nC        10.2.2.0\/30 is directly connected, GigabitEthernet0\/3\nL        10.2.2.2\/32 is directly connected, GigabitEthernet0\/3\nO        10.20.5.1\/32 &#91;110\/2] via 10.2.1.1, 02:14:03, GigabitEthernet0\/2\nO        10.20.6.1\/32 &#91;110\/2] via 10.2.2.1, 02:14:03, GigabitEthernet0\/3\nC        10.20.7.1\/32 is directly connected, Loopback0<\/code><\/pre>\n\n\n\n<p>\u6700\u521d\u306e\u72b6\u614b\u3067\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u4f55\u3082\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u300c\u8a2d\u5b9a\u30ed\u30b0\u300d\u3067\u8a18\u8f09\u3057\u305fConfig\u3092\u6295\u5165\u5f8c\u3069\u3046\u306a\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router7#<span style=\"color:#00ff00\" class=\"swl-inline-color\"><strong>show ip route<\/strong><\/span>\nCodes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP\n       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area\n       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2\n       E1 - OSPF external type 1, E2 - OSPF external type 2\n       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2\n       ia - IS-IS inter area, * - candidate default, U - per-user static route\n       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP\n       a - application route\n       + - replicated route, % - next hop override, p - overrides from PfR\n\nGateway of last resort is not set\n\n      10.0.0.0\/8 is variably subnetted, 8 subnets, 2 masks\nO        10.2.0.0\/30 &#91;110\/2] via 10.2.2.1, 02:23:24, GigabitEthernet0\/3\n                     &#91;110\/2] via 10.2.1.1, 02:23:24, GigabitEthernet0\/2\nC        10.2.1.0\/30 is directly connected, GigabitEthernet0\/2\nL        10.2.1.2\/32 is directly connected, GigabitEthernet0\/2\nC        10.2.2.0\/30 is directly connected, GigabitEthernet0\/3\nL        10.2.2.2\/32 is directly connected, GigabitEthernet0\/3\nO        10.20.5.1\/32 &#91;110\/2] via 10.2.1.1, 02:23:24, GigabitEthernet0\/2\nO        10.20.6.1\/32 &#91;110\/2] via 10.2.2.1, 02:23:24, GigabitEthernet0\/3\nC        10.20.7.1\/32 is directly connected, Loopback0<\/code><\/pre>\n\n\n\n<p><span style=\"color:#ff0000\" class=\"swl-inline-color\">\u8a2d\u5b9a\u6295\u5165\u5f8c\u306b\u3082\u95a2\u308f\u3089\u305a\u300c10.10.4.1\/32\u300d\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/span><\/p>\n\n\n\n<p>\u3067\u306f\u3001BGP\u30c6\u30fc\u30d6\u30eb\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router7#<span style=\"color:#00ff00\" class=\"swl-inline-color\">show ip bgp<\/span>\nBGP table version is 2, local router ID is 10.20.7.1\nStatus codes: s suppressed, d damped, h history, * valid, &gt; best, i - internal,\n              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,\n              x best-external, a additional-path, c RIB-compressed,\n              t secondary path,\nOrigin codes: i - IGP, e - EGP, ? - incomplete\nRPKI validation codes: V valid, I invalid, N Not found\n\n     Network          Next Hop            Metric LocPrf Weight Path\n <span style=\"color:#ffff00\" class=\"swl-inline-color\">* i  10.10.4.1\/32     192.168.1.1              0    100      0 100 i<\/span>\n *&gt;   10.20.7.1\/32     0.0.0.0                  0         32768 i\nRouter7#<\/code><\/pre>\n\n\n\n<p>\u300c10.10.4.1\u300d\u3092\u3057\u3063\u304b\u308a\u53d7\u4fe1\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"red\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#ff0000\" class=\"swl-inline-color\">\u3053\u308c\u306f\u306a\u305c\u3067\u3057\u3087\u3046\uff1f<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<div class=\"swell-block-capbox cap_box is-style-onborder_ttl2\" data-colset=\"col1\"><div class=\"cap_box_ttl\"><span>\u539f\u56e0\u306f\uff1f<\/span><\/div><div class=\"cap_box_content\">\n<p class=\"has-text-align-center\"><strong><span style=\"color:#ff0000\" class=\"swl-inline-color\">\u30eb\u30fc\u30bf7\u304cNexthop\u3068\u306a\u3063\u3066\u3044\u308b\u300c192.168.1.1\u300d\u306e\u7d4c\u8def\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u305f\u3081<\/span><\/strong><\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u306f\u3001eBGP\u30d4\u30a2\u3092\u6301\u3064\u30eb\u30fc\u30bf\uff08\u30eb\u30fc\u30bf5\uff09\u304b\u3089\u5404iBGP\u306b\u5bfe\u3057\u300cnext-hop-self\u300d\u3092\u8a2d\u5b9a\u3057\u3066\u3042\u3052\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"blue\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2022\/12\/cropped-\u3060\u3044\u307e\u308b.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p><strong><span style=\"color:#0000ff\" class=\"swl-inline-color\">\u3053\u306e\u8a2d\u5b9a\u3067eBGP\u30eb\u30fc\u30bf\u304c\u6301\u3064IP\u30a2\u30c9\u30ec\u30b9\u306bnexthop\u3092\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/span><\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router5(config)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">router bgp 200<\/span>\nRouter5(config-router)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 10.20.6.1 next-hop-self<\/span>\nRouter5(config-router)#<span style=\"color:#00ff00\" class=\"swl-inline-color\">neighbor 10.20.7.1 next-hop-self<\/span><\/code><\/pre>\n\n\n\n<p>\u8a2d\u5b9a\u5f8c\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-black-background-color has-background\"><code>Router7<span style=\"color:#00ff00\" class=\"swl-inline-color\">#show ip route<\/span>\nCodes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP\n       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area\n       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2\n       E1 - OSPF external type 1, E2 - OSPF external type 2\n       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2\n       ia - IS-IS inter area, * - candidate default, U - per-user static route\n       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP\n       a - application route\n       + - replicated route, % - next hop override, p - overrides from PfR\n\nGateway of last resort is not set\n\n      10.0.0.0\/8 is variably subnetted, 9 subnets, 2 masks\nO        10.2.0.0\/30 &#91;110\/2] via 10.2.2.1, 02:33:31, GigabitEthernet0\/3\n                     &#91;110\/2] via 10.2.1.1, 02:33:31, GigabitEthernet0\/2\nC        10.2.1.0\/30 is directly connected, GigabitEthernet0\/2\nL        10.2.1.2\/32 is directly connected, GigabitEthernet0\/2\nC        10.2.2.0\/30 is directly connected, GigabitEthernet0\/3\nL        10.2.2.2\/32 is directly connected, GigabitEthernet0\/3\n<span style=\"color:#ffff00\" class=\"swl-inline-color\">B        10.10.4.1\/32 &#91;200\/0] via 10.20.5.1, 00:01:02<\/span>\nO        10.20.5.1\/32 &#91;110\/2] via 10.2.1.1, 02:33:31, GigabitEthernet0\/2\nO        10.20.6.1\/32 &#91;110\/2] via 10.2.2.1, 02:33:31, GigabitEthernet0\/3\nC        10.20.7.1\/32 is directly connected, Loopback0\nRouter7#<\/code><\/pre>\n\n\n\n<p>\u300c10.10.4.1\/32\u300d\u304c\u3057\u3063\u304b\u308a\u53cd\u6620\u3055\u308c\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n\n<p>Network\u6587\u3092\u8a2d\u5b9a\u3057\u305f\u969b\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u3068\u3053\u308d\u3001\u300cUPDATE\u30e1\u30c3\u30bb\u30fc\u30b8\u300d\u306b\u3057\u3063\u304b\u308a\u8f09\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n<div class=\"wp-block-image is-style-border\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"640\" src=\"http:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x640.png\" alt=\"\" class=\"wp-image-4199\" style=\"width:832px;height:auto\" srcset=\"https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1024x640.png 1024w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-300x187.png 300w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-768x480.png 768w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-1536x960.png 1536w, https:\/\/daimaru-tech-blog.com\/wp-content\/uploads\/2026\/01\/\u3010BGP\u3011BGP\u57fa\u672c\u8a2d\u5b9a_Network\u6587_\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3-2048x1280.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"p-blogParts post_content\" data-partsID=\"3934\">\n<center>\n    <div class=\"product-banner-container\">\n        <div class=\"image-section\">\n            <img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/81gk7U+lsML._SY385_.jpg\"  class=\"product-main-image\">\n        <\/div>\n        <div class=\"content-section\">\n            <div class=\"product-title\">\u30a4\u30f3\u30d5\u30e9\/\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u305f\u3081\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6280\u8853&#038;\u8a2d\u8a08\u5165\u9580<\/div>\n            <div class=\"product-subtitle\">\u301c2\u4e074000\u90e8\u7a81\u7834\u306e\u30d9\u30b9\u30c8\u30bb\u30e9\u30fc\u304c5\u5e74\u3076\u308a\u306e\u6539\u8a02!\u301c<\/div>\n            <div class=\"button-row\">            \n                <a href=\"https:\/\/amzn.to\/4oUD1Fl\" target=\"_blank\" class=\"buy-button amazon\">\n                    Amazon\u3067\u898b\u308b\n                <\/a>\n                <a 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