{"id":1415,"date":"2025-10-17T22:43:18","date_gmt":"2025-10-17T13:43:18","guid":{"rendered":"https:\/\/mylifeisbeautiful555.net\/?page_id=1415"},"modified":"2025-10-17T22:43:18","modified_gmt":"2025-10-17T13:43:18","slug":"%e3%83%91%e3%82%b9%e3%82%a2%e3%83%88%e3%83%aa%e3%83%93%e3%83%a5%e3%83%bc%e3%83%88%e3%81%a8%e3%83%99%e3%82%b9%e3%83%88%e3%83%91%e3%82%b9%e9%81%b8%e6%8a%9e","status":"publish","type":"page","link":"https:\/\/mylifeisbeautiful555.net\/?page_id=1415","title":{"rendered":"\u30d1\u30b9\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8\u3068\u30d9\u30b9\u30c8\u30d1\u30b9\u9078\u629e"},"content":{"rendered":"\n
<\/td>BGP \u30d1\u30b9\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8\uff08Path Attribute\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

BGP\u304c\u7d4c\u8def\u3092\u5224\u65ad\u3059\u308b\u305f\u3081\u306b\u4f7f\u3046\u60c5\u5831\uff08\u5c5e\u6027\uff09\u306e\u3053\u3068\u3092 \u30d1\u30b9\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8<\/strong> \u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n

BGP\u3067\u9001\u3089\u308c\u308b\u7d4c\u8def\uff08\u30eb\u30fc\u30c8\uff09\u306b\u306f\u3001\u5fc5\u305a\u3053\u308c\u3089\u306e\u5c5e\u6027\u304c\u4ed8\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u30d1\u30b9\u5c5e\u6027\u306e\u5206\u985e<\/h2>\n\n\n\n

BGP\u306e\u30d1\u30b9\u5c5e\u6027\u306f\u3001\u5927\u304d\u304f 4\u7a2e\u985e<\/strong> \u306b\u5206\u985e\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

\u5206\u985e<\/th>\u8aac\u660e<\/th>\u4f8b<\/th><\/tr><\/thead>
Well-known Mandatory\uff08\u5fc5\u9808\u5c5e\u6027\uff09<\/strong><\/td>\u3059\u3079\u3066\u306eBGP\u30eb\u30fc\u30bf\u3067\u5fc5\u305a\u8a8d\u8b58\u30fb\u9001\u4fe1\u3055\u308c\u308b<\/td>AS_PATH, NEXT_HOP, ORIGIN<\/td><\/tr>
Well-known Discretionary\uff08\u4efb\u610f\u5c5e\u6027\uff09<\/strong><\/td>\u3059\u3079\u3066\u306eBGP\u30eb\u30fc\u30bf\u3067\u8a8d\u8b58\u3059\u308b\u304c\u3001\u9001\u308b\u304b\u306f\u4efb\u610f<\/td>LOCAL_PREF<\/td><\/tr>
Optional Transitive\uff08\u4efb\u610f\u30fb\u4f1d\u9054\u578b\uff09<\/strong><\/td>\u672a\u5bfe\u5fdc\u3067\u3082\u8ee2\u9001\u3055\u308c\u308b<\/td>COMMUNITY, AGGREGATOR<\/td><\/tr>
Optional Non-Transitive\uff08\u4efb\u610f\u30fb\u975e\u4f1d\u9054\u578b\uff09<\/strong><\/td>\u672a\u5bfe\u5fdc\u306a\u3089\u7834\u68c4\u3055\u308c\u308b<\/td>MED\uff08Multi Exit Discriminator\uff09\u306a\u3069<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4e3b\u306aBGP\u30d1\u30b9\u5c5e\u6027\u4e00\u89a7<\/p>\n\n\n\n

\u5c5e\u6027\u540d<\/th>\u7a2e\u985e<\/th>\u5185\u5bb9<\/th>\u6bd4\u8f03\u65b9\u5411<\/th><\/tr><\/thead>
AS_PATH<\/strong><\/td>Well-known Mandatory<\/td>\u7d4c\u7531\u3057\u305fAS\u756a\u53f7\u306e\u30ea\u30b9\u30c8\u3002\u30eb\u30fc\u30d7\u9632\u6b62\u306b\u4f7f\u3046\u3002<\/td>\u77ed\u3044\u65b9\u304c\u512a\u5148<\/td><\/tr>
NEXT_HOP<\/strong><\/td>Well-known Mandatory<\/td>\u6b21\u306e\u30eb\u30fc\u30bf\uff08\u30cd\u30af\u30b9\u30c8\u30db\u30c3\u30d7\uff09\u306eIP\u30a2\u30c9\u30ec\u30b9<\/td>\u2013<\/td><\/tr>
ORIGIN<\/strong><\/td>Well-known Mandatory<\/td>\u7d4c\u8def\u306e\u751f\u6210\u5143\uff08IGP\/EGP\/incomplete\uff09<\/td>IGP < EGP < incomplete<\/td><\/tr>
LOCAL_PREF<\/strong><\/td>Well-known Discretionary<\/td>\u540c\u4e00AS\u5185\u3067\u306e\u512a\u5148\u5ea6\u3002\u5927\u304d\u3044\u5024\u307b\u3069\u512a\u5148\u3002<\/td>\u5927\u304d\u3044\u65b9\u304c\u512a\u5148<\/td><\/tr>
MED<\/strong><\/td>Optional Non-Transitive<\/td>\u8907\u6570\u51fa\u53e3\u304c\u3042\u308b\u5834\u5408\u306e\u512a\u5148\u5ea6\u3002\u5c0f\u3055\u3044\u65b9\u304c\u512a\u5148\u3002<\/td>\u5c0f\u3055\u3044\u65b9\u304c\u512a\u5148<\/td><\/tr>
COMMUNITY<\/strong><\/td>Optional Transitive<\/td>\u7d4c\u8def\u306b\u30bf\u30b0\u4ed8\u3051\u3057\u3001\u67d4\u8edf\u306a\u5236\u5fa1\u304c\u53ef\u80fd\u3002<\/td>\u30dd\u30ea\u30b7\u30fc\u306b\u4f9d\u5b58<\/td><\/tr>
ATOMIC_AGGREGATE \/ AGGREGATOR<\/strong><\/td>Optional Transitive<\/td>\u7d4c\u8def\u96c6\u7d04\u306e\u60c5\u5831<\/td>\u2013<\/td><\/tr>
Weight\uff08Cisco\u72ec\u81ea\uff09<\/strong><\/td>\u2013<\/td>\u6700\u521d\u306b\u6bd4\u8f03\u3055\u308c\u308b\u3002\u5927\u304d\u3044\u307b\u3069\u512a\u5148\u3002<\/td>\u5927\u304d\u3044\u65b9\u304c\u512a\u5148<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/td>BGP \u30d9\u30b9\u30c8\u30d1\u30b9\u9078\u629e\u30eb\u30fc\u30eb\uff08Best Path Selection\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

BGP\u304c\u8907\u6570\u306e\u7d4c\u8def\u3092\u5b66\u7fd2\u3057\u305f\u5834\u5408\u3001
\u300c\u3069\u306e\u7d4c\u8def\u3092\u63a1\u7528\u3057\u3066\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u5165\u308c\u308b\u304b\u300d<\/strong> \u3092\u6c7a\u3081\u308b\u305f\u3081\u306e\u30eb\u30fc\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n

show ip bgp\u30b3\u30de\u30f3\u30c9\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

BGP\u30eb\u30fc\u30bf\u306f\u4ee5\u4e0b\u306e\u9806\u756a\u3067\u6bd4\u8f03\u3057\u307e\u3059\u3002\uff08Cisco\u57fa\u6e96\uff09<\/strong><\/p>\n\n\n\n

\u512a\u5148\u9806\u4f4d<\/th>\u6bd4\u8f03\u9805\u76ee<\/th>\u6761\u4ef6\u30fb\u512a\u5148\u3055\u308c\u308b\u3082\u306e<\/th><\/tr><\/thead>
\u2460<\/td>Weight<\/strong><\/td>\u5927\u304d\u3044\u65b9\u304c\u512a\u5148\uff08Cisco\u72ec\u81ea\uff09<\/td><\/tr>
\u2461<\/td>Local Preference\uff08LOCAL_PREF\uff09<\/strong><\/td>\u5927\u304d\u3044\u65b9\u304c\u512a\u5148\uff08AS\u5185\u306e\u512a\u5148\u5ea6\uff09<\/td><\/tr>
\u2462<\/td>Originated Route\uff08\u81ea\u5206\u304c\u5e83\u544a\u3057\u305f\u30eb\u30fc\u30c8\uff09<\/strong><\/td>\u81ea\u5206\u3067\u751f\u6210\u3057\u305f\u7d4c\u8def\u3092\u512a\u5148<\/td><\/tr>
\u2463<\/td>AS_PATH \u9577\u3055<\/strong><\/td>\u77ed\u3044\u65b9\u304c\u512a\u5148\uff08\u7d4c\u7531AS\u304c\u5c11\u306a\u3044\uff09<\/td><\/tr>
\u2464<\/td>Origin Type\uff08ORIGIN\uff09<\/strong><\/td>IGP < EGP < incomplete \u306e\u9806<\/td><\/tr>
\u2465<\/td>MED\uff08Multi Exit Discriminator\uff09<\/strong><\/td>\u5c0f\u3055\u3044\u65b9\u304c\u512a\u5148\uff08\u5916\u90e8AS\u9593\u6bd4\u8f03\uff09<\/td><\/tr>
\u2466<\/td>eBGP > iBGP<\/strong><\/td>\u5916\u90e8\u7d4c\u8def\u3092\u512a\u5148<\/td><\/tr>
\u2467<\/td>IGP Metric\uff08\u6b21\u30db\u30c3\u30d7\u307e\u3067\u306e\u30b3\u30b9\u30c8\uff09<\/strong><\/td>\u5c0f\u3055\u3044\u65b9\u304c\u512a\u5148\uff08\u5185\u90e8\u7d4c\u8def\u30b3\u30b9\u30c8\uff09<\/td><\/tr>
\u2468<\/td>Router-ID<\/strong><\/td>\u5c0f\u3055\u3044Router-ID\u306e\u30eb\u30fc\u30bf\u3092\u512a\u5148<\/td><\/tr>
\u2469<\/td>Neighbor IP\u30a2\u30c9\u30ec\u30b9<\/strong><\/td>\u5c0f\u3055\u3044IP\u30a2\u30c9\u30ec\u30b9\u306e\u96a3\u63a5\u3092\u512a\u5148<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u5c5e\u6027<\/th>\u4f8b<\/th>\u610f\u5473<\/th><\/tr><\/thead>
Weight<\/strong><\/td>Cisco\u72ec\u81ea\u3002\u624b\u52d5\u8a2d\u5b9a\u53ef\u80fd\uff08neighbor x.x.x.x weight 200\uff09<\/td>\u7279\u5b9a\u30eb\u30fc\u30bf\u3067\u306e\u512a\u5148\u5236\u5fa1<\/td><\/tr>
LOCAL_PREF<\/strong><\/td>AS\u5185\u5171\u901a\u306e\u512a\u5148\u5024\uff08bgp default local-preference 200\uff09<\/td>AS\u5168\u4f53\u306e\u51fa\u53e3\u5236\u5fa1<\/td><\/tr>
AS_PATH<\/strong><\/td>AS65001 AS65002 AS65003<\/td>\u901a\u904eAS\u6570\u304c\u5c11\u306a\u3044\u7d4c\u8def\u3092\u9078\u3076<\/td><\/tr>
MED<\/strong><\/td>ISP-A: MED 10 \/ ISP-B: MED 20<\/td>\u5c0f\u3055\u3044\u65b9\uff08MED10\uff09\u3092\u512a\u5148<\/td><\/tr>
ORIGIN<\/strong><\/td>IGP \/ EGP \/ incomplete<\/td>IGP\u7531\u6765\u304c\u3082\u3063\u3068\u3082\u4fe1\u983c\u3055\u308c\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

BGP\u304c\u7d4c\u8def\u3092\u5224\u65ad\u3059\u308b\u305f\u3081\u306b\u4f7f\u3046\u60c5\u5831\uff08\u5c5e\u6027\uff09\u306e\u3053\u3068\u3092 \u30d1\u30b9\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8 \u3068\u547c\u3073\u307e\u3059\u3002 BGP\u3067\u9001\u3089\u308c\u308b\u7d4c\u8def\uff08\u30eb\u30fc\u30c8\uff09\u306b\u306f\u3001\u5fc5\u305a\u3053\u308c\u3089\u306e\u5c5e\u6027\u304c\u4ed8\u3044\u3066\u3044\u307e\u3059\u3002 \u30d1\u30b9\u5c5e\u6027\u306e\u5206\u985e BGP\u306e\u30d1\u30b9\u5c5e\u6027\u306f\u3001\u5927\u304d\u304f 4\u7a2e\u985e \u306b\u5206\u985e\u3055\u308c […]<\/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-1415","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1415","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=1415"}],"version-history":[{"count":2,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1415\/revisions"}],"predecessor-version":[{"id":1417,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1415\/revisions\/1417"}],"wp:attachment":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}