{"id":1431,"date":"2025-11-29T04:51:13","date_gmt":"2025-11-28T19:51:13","guid":{"rendered":"https:\/\/mylifeisbeautiful555.net\/?page_id=1431"},"modified":"2025-11-29T04:51:13","modified_gmt":"2025-11-28T19:51:13","slug":"%e3%82%a2%e3%83%88%e3%83%aa%e3%83%93%e3%83%a5%e3%83%bc%e3%83%88-as_path","status":"publish","type":"page","link":"https:\/\/mylifeisbeautiful555.net\/?page_id=1431","title":{"rendered":"\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8 AS_PATH"},"content":{"rendered":"\n

AS_PATH\uff08AS\u30d1\u30b9\uff09\u3068\u306f\uff1f<\/h1>\n\n\n\n

AS_PATH\u3068\u306f\u3001\u901a\u904e\u3057\u305fAS\u3092\u8a18\u9332\u3057\u305f\u3082\u306e\u3002<\/strong><\/p>\n\n\n\n

\n

BGP\u7d4c\u8def\u304c\u901a\u904e\u3057\u3066\u304d\u305f\u300cAS\uff08\u81ea\u5f8b\u30b7\u30b9\u30c6\u30e0\uff09\u300d\u306e\u756a\u53f7\u3092\u3001
\u5de6\u304b\u3089\u9806\u756a\u306b\u30ea\u30b9\u30c8\u5f62\u5f0f\u3067\u8a18\u9332\u3059\u308b\u5c5e\u6027<\/strong>\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n<\/blockquote>\n\n\n\n

BGP\u30eb\u30fc\u30bf\u306f\u7d4c\u8def\u60c5\u5831\u3092\u4ea4\u63db\u3059\u308b\u3068\u304d\u306b\u3001
\u305d\u306e\u7d4c\u8def\u304c\u300c\u3069\u306eAS\u3092\u901a\u3063\u3066\u304d\u305f\u304b\u300d\u3092\u3053\u306eAS_PATH\u3067\u77e5\u3089\u305b\u307e\u3059\u3002<\/p>\n\n\n\n

AS_PATH\u306e\u898b\u65b9<\/h2>\n\n\n\n

show ip bgp \u3067\u3001<\/p>\n\n\n\n

AS_PATH: 65001 65002 65003<\/code><\/pre>\n\n\n\n
\u3053\u306e\u5834\u5408\u3001<\/p>\n\n\n\n
\u9001\u4fe1\u5143AS65003 \u2192 AS65002 \u2192 AS65001 \u2192 \u81ea\u5206<\/code><\/pre>\n\n\n\n
\u3064\u307e\u308a\u3001\u3053\u306e\u7d4c\u8def\u60c5\u5831\u306f AS65003<\/strong> \u304b\u3089\u59cb\u307e\u308a\u3001
AS65002 \u2192 AS65001<\/strong> \u3068\u901a\u3063\u3066\u81ea\u5206\u306eAS\u306b\u5c4a\u3044\u305f\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
BGP\u30eb\u30fc\u30d7\u9632\u6b62\u306e\u4ed5\u7d44\u307f<\/h1>\n\n\n\n
AS_PATH\u306e\u6700\u3082\u91cd\u8981\u306a\u5f79\u5272\u306f \u30eb\u30fc\u30d7\u9632\u6b62<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n
BGP\u30eb\u30fc\u30bf\u306f\u3001\u81ea\u5206\u306eAS\u756a\u53f7\u304cAS_PATH\u306e\u4e2d\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u7d4c\u8def\u3092\u53d7\u3051\u53d6\u308b\u3068\u3001
\u300c\u305d\u308c\u306f\u81ea\u5206\u3092\u7d4c\u7531\u3057\u3066\u623b\u3063\u3066\u304d\u305f\u7d4c\u8def\u3060\uff01\u300d\u3068\u5224\u65ad\u3057\u3066\u7834\u68c4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d4c\u8def\u5e83\u544a:
AS65001 \u2192 AS65002 \u2192 AS65003
\u3082\u3057AS65003\u304c\u3053\u306e\u7d4c\u8def\u3092\u53d7\u3051\u53d6\u308a\u3001\u518d\u3073AS65001\u306b\u9001\u308a\u8fd4\u3057\u305f\u3089\u2026<\/strong><\/p>\n\n\n\n
AS_PATH: 65001 65002 65003
AS65001\u306f\u81ea\u5206\u306e\u756a\u53f7\u300c65001\u300d\u3092\u898b\u3064\u3051\u3066\u3001
\u300c\u30eb\u30fc\u30d7\u3057\u3066\u3044\u308b\uff01\u300d\u3068\u5224\u65ad\u3057\u7834\u68c4\u3057\u307e\u3059\u3002<\/strong>
\u2192 \u3053\u308c\u306b\u3088\u308a\u3001\u7d4c\u8def\u30eb\u30fc\u30d7\u304c\u81ea\u52d5\u7684\u306b\u9632\u6b62\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
AS_PATH \u306e\u78ba\u8a8d\u30b3\u30de\u30f3\u30c9<\/h1>\n\n\n\n
show ip bgp\u3067\u78ba\u8a8d\u3057\u307e\u3059<\/p>\n\n\n\n
AS_PATH \u306e\u64cd\u4f5c\uff08\u30dd\u30ea\u30b7\u30fc\u5236\u5fa1\uff09<\/h1>\n\n\n\n
\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u904b\u7528\u8005\u306fAS_PATH\u3092\u610f\u56f3\u7684\u306b\u64cd\u4f5c<\/strong>\u3057\u3066\u3001
\u7d4c\u8def\u9078\u629e\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
1. AS_PATH prepend\uff08\u30d7\u30ec\u30da\u30f3\u30c9\uff09<\/h2>\n\n\n\n
AS_PATH\u3092\u610f\u56f3\u7684\u306b\u9577\u304f\u3057\u3066<\/strong>\u3001
\u305d\u306e\u7d4c\u8def\u3092\u3001\u9060\u56de\u308a\u306b\u898b\u305b\u308b<\/strong>\u3053\u3068\u3067\u512a\u5148\u5ea6\u3092\u4e0b\u3052\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n
route-map PREPEND<\/strong> permit 10\n set as-path prepend 65010 65010 65010<\/strong>\nrouter bgp 65010\n ! IPv4 Unicast \u306e\u4f8b\n address-family ipv4\n  neighbor 203.0.113.1 remote-as 65001\n  neighbor 203.0.113.1 route-map PREPEND<\/strong> out\n exit-address-family<\/code><\/pre>\n\n\n\n
\u2192 \u81ea\u5206\u306eAS\u756a\u53f7\u30923\u56de\u8ffd\u52a0\u3057\u3066\u9001\u4fe1\u3002<\/strong>
\u76f8\u624bAS\u306f\u300cAS65010\u30923\u56de\u3082\u901a\u308b\u300d\u3068\u5224\u65ad\u3057\u3001\u4ed6\u30eb\u30fc\u30c8\u3092\u512a\u5148\u3059\u308b\u3002<\/p>\n\n\n\n
2. AS_PATH\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h2>\n\n\n\n
ip as-path access-list<\/code> \u3092\u4f7f\u3063\u3066\u3001
\u7279\u5b9a\u306eAS\u304b\u3089\u6765\u305f\u7d4c\u8def\u3060\u3051\u3092\u53d7\u3051\u5165\u308c\u308b\uff0f\u62d2\u5426\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
ip as-path access-list 10 permit ^65002$\nrouter bgp 65001\n neighbor 192.0.2.2 filter-list 10 in\n<\/code><\/pre>\n\n\n\n
\u2192 AS65002\u300c\u306e\u307f\u300d\u304b\u3089\u6765\u305f\u7d4c\u8def\u3092\u53d7\u3051\u5165\u308c\u308b\u3002<\/p>\n\n\n\n
AS-PATH \u3092\u78ba\u8a8d\u3059\u308b\u30b3\u30de\u30f3\u30c9<\/strong><\/h1>\n\n\n\n
Cisco IOS\/ASA<\/h2>\n\n\n\n
show ip bgp <prefix>\n<\/code><\/pre>\n\n\n\n
\u4f8b\uff1a<\/p>\n\n\n\n
Router# show ip bgp 1.1.1.0\n...\n  AS-path: 65020 65010<\/code><\/pre>\n\n\n\n
\u307e\u3068\u3081<\/h1>\n\n\n\n
\u9805\u76ee<\/th>\u8aac\u660e<\/th><\/tr><\/thead>
\u5f79\u52721<\/td>\u30eb\u30fc\u30d7\u9632\u6b62<\/td><\/tr>
\u5f79\u52722<\/td>\u7d4c\u8def\u9078\u629e\uff08\u77ed\u3044\u65b9\u304c\u512a\u5148\uff09<\/td><\/tr>
\u5f79\u52723<\/td>\u7d4c\u8def\u64cd\u4f5c\uff08AS prepend\uff09<\/td><\/tr>
\u8868\u793a\u9806\u4f4d<\/td>\u53f3\u5074\u304c\u6700\u521d\u306e AS\u3001\u5de6\u304c\u6700\u5f8c\u306b\u8ffd\u52a0\u3055\u308c\u305f AS<\/td><\/tr>
iBGP<\/td>AS-PATH \u306f\u66f8\u304d\u63db\u308f\u3089\u306a\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"
AS_PATH\uff08AS\u30d1\u30b9\uff09\u3068\u306f\uff1f AS_PATH\u3068\u306f\u3001\u901a\u904e\u3057\u305fAS\u3092\u8a18\u9332\u3057\u305f\u3082\u306e\u3002 BGP\u7d4c\u8def\u304c\u901a\u904e\u3057\u3066\u304d\u305f\u300cAS\uff08\u81ea\u5f8b\u30b7\u30b9\u30c6\u30e0\uff09\u300d\u306e\u756a\u53f7\u3092\u3001\u5de6\u304b\u3089\u9806\u756a\u306b\u30ea\u30b9\u30c8\u5f62\u5f0f\u3067\u8a18\u9332\u3059\u308b\u5c5e\u6027\u306e\u3053\u3068\u3067\u3059\u3002 BGP\u30eb\u30fc\u30bf\u306f\u7d4c\u8def\u60c5\u5831\u3092\u4ea4\u63db […]<\/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-1431","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1431","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=1431"}],"version-history":[{"count":6,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1431\/revisions"}],"predecessor-version":[{"id":1695,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1431\/revisions\/1695"}],"wp:attachment":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}