{"id":394,"date":"2021-07-02T02:23:29","date_gmt":"2021-07-01T17:23:29","guid":{"rendered":"https:\/\/blog.daichang.me\/?p=394"},"modified":"2025-11-18T01:42:03","modified_gmt":"2025-11-17T16:42:03","slug":"cisco-ios-xe-%e3%81%a7-ospf-neighbor-%e3%81%8b%e3%82%89%e5%8f%97%e4%bf%a1%e3%81%99%e3%82%8b%e7%b5%8c%e8%b7%af%e3%82%92%e3%83%95%e3%82%a3%e3%83%ab%e3%82%bf%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/blog.daichang.me\/?p=394","title":{"rendered":"Cisco IOS XE \u3067 OSPF neighbor \u304b\u3089\u53d7\u4fe1\u3059\u308b\u7d4c\u8def\u3092\u30d5\u30a3\u30eb\u30bf\u3059\u308b"},"content":{"rendered":"

OSPF \u3067\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u3092\u69cb\u6210\u3057\u3066\u3044\u308b\u6642\u306b\u3001NAT \u30eb\u30fc\u30bf\u306a\u3069\u304b\u3089 Private IPv4 \u30a2\u30c9\u30ec\u30b9\u304c\u805e\u3053\u3048\u3066\u304f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
\n\u305d\u3046\u3044\u3063\u305f\u4e0d\u8981\u306a Private IPv4 \u306e prefix \u3092\u30d5\u30a3\u30eb\u30bf\u3057\u305f\u306e\u3067\u3001\u305d\u306e\u5185\u5bb9\u3092\u30e1\u30e2\u306b\u6b8b\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n

\u306a\u304a\u3001\u4f7f\u7528\u3057\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u306f Cisco IOS XE Software [Gibraltar], Version 16.12.04 \u3068\u306a\u308a\u307e\u3059\u3002
\n<\/p>\n

\u4eca\u56de\u306f\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u30a8\u30ea\u30a2 (area 0.0.0.0) \u306e\u7d4c\u8def\u3092\u30d5\u30a3\u30eb\u30bf\u5bfe\u8c61\u3068\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3088\u304f area \u9593\u306e\u7d4c\u8def\u3092\u30d5\u30a3\u30eb\u30bf\u3059\u308b\u305f\u3081\u306b ABR \u3067\u4f7f\u308f\u308c\u308b area filter-list \u3067\u306f\u306a\u304f distribute-list in \u3067\u30d5\u30a3\u30eb\u30bf\u3092\u3057\u307e\u3059\u3002<\/p>\n

Private IP address (RFC1918)<\/a> \u3068 ISP Shared Address (RFC6890)<\/a> \u3092\u30d5\u30a3\u30eb\u30bf\u3059\u308b config \u306f\u3053\u306e\u69d8\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n

ip access-list standard OSPF-ingress-drop-v4\r\n 10 deny   10.0.0.0 0.255.255.255\r\n 20 deny   172.16.0.0 0.15.255.255\r\n 30 deny   192.168.0.0 0.0.255.255\r\n 40 deny   100.64.0.0 0.63.255.255\r\n 50 permit any\r\n!\r\nroute-map OSPF-ingress-drop-v4 permit 10 \r\n match ip address OSPF-ingress-drop-v4\r\n!\r\nrouter ospf 1\r\n distribute-list route-map OSPF-ingress-drop-v4 in\r\n<\/pre>\n
\u3053\u308c\u306b\u3088\u308a\u7d4c\u8def\u60c5\u5831\u304c\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u308b\u305f\u3081\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3078\u4e57\u308b\u3053\u3068\u304c\u7121\u304f\u306a\u308a\u307e\u3059\u3002
\n\u3057\u304b\u3057\u3001LSA \u305d\u306e\u3082\u306e\u304c\u6d88\u3048\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u30d5\u30a3\u30eb\u30bf\u3057\u3066\u3044\u308b\u7d4c\u8def\u60c5\u5831\u3082\u542b\u3081\u3066 LSDB \u306f\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u70b9\u306b\u306f\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\u307e\u305f\u3001OSPF distribute-list \u306e\u5b9f\u88c5\u5909\u66f4\u306b\u3064\u3044\u3066 – Cisco Community<\/a> \u306b\u3082\u66f8\u304b\u308c\u3066\u3044\u308b\u3068\u304a\u308a\u3001IOS \u306b\u306f OSPF local RIB \u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u306a\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3082\u3042\u308a\u3001\u5b9f\u88c5\u7248\u3068\u672a\u5b9f\u88c5\u7248\u306b\u304a\u3044\u3066 distribute-list \u306b\u304a\u3051\u308b\u7d4c\u8def\u8a55\u4fa1\u30fb\u8a08\u7b97\u7d50\u679c\u304c\u7570\u306a\u308a\u3001routing loop \u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u5b9f\u969b\u306b\u5229\u7528\u3055\u308c\u308b\u5834\u5408\u306b\u306f\u5341\u5206\u6ce8\u610f\u3057\u3001\u52d5\u4f5c\u691c\u8a3c\u3092\u5b9f\u65bd\u306e\u4e0a\u3067\u672c\u756a\u74b0\u5883\u3078\u9069\u7528\u3092\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
OSPF \u3067\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u3092\u69cb\u6210\u3057\u3066\u3044\u308b\u6642\u306b\u3001NAT \u30eb\u30fc\u30bf\u306a\u3069\u304b\u3089 Private IPv4 \u30a2\u30c9\u30ec\u30b9\u304c\u805e\u3053\u3048\u3066\u304f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u3046\u3044\u3063\u305f\u4e0d\u8981\u306a Private IPv4 \u306e prefix \u3092\u30d5\u30a3\u30eb\u30bf\u3057\u305f\u306e\u3067\u3001\u305d\u306e […]<\/p>\n
\u7d9a\u304d\u3092\u8aad\u3080… from Cisco IOS XE \u3067 OSPF neighbor \u304b\u3089\u53d7\u4fe1\u3059\u308b\u7d4c\u8def\u3092\u30d5\u30a3\u30eb\u30bf\u3059\u308b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[7,12,16],"class_list":["post-394","post","type-post","status-publish","format-standard","hentry","category-tech","tag-cisco","tag-ios-xe","tag-network"],"_links":{"self":[{"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/posts\/394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=394"}],"version-history":[{"count":1,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/posts\/394\/revisions"}],"predecessor-version":[{"id":435,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=\/wp\/v2\/posts\/394\/revisions\/435"}],"wp:attachment":[{"href":"https:\/\/blog.daichang.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.daichang.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}