{"id":479,"date":"2025-10-22T09:58:27","date_gmt":"2025-10-22T01:58:27","guid":{"rendered":"https:\/\/www.youvii.site\/?p=479"},"modified":"2025-10-22T09:58:27","modified_gmt":"2025-10-22T01:58:27","slug":"78dhcpsnoopingzhentingpaicuo","status":"publish","type":"post","link":"https:\/\/www.youvii.site\/index.php\/archives\/78dhcpsnoopingzhentingpaicuo","title":{"rendered":"7.8DHCPsnooping\u4fa6\u542c\u6392\u9519"},"content":{"rendered":"<h1>7.8 DHCP snooping\u4fa6\u542c\u6392\u9519<\/h1>\n<p><strong>DHCP snooping\u6392\u9519\u7ecf\u5386&#8211;DHCP&#8211;DHCP\u914d\u7f6e&#8211;DHCP\u534f\u8bae&#8211;DHCPsnooping\u6392\u9519\u7ecf\u5386<\/strong><\/p>\n<p><font style=\"color:#000000;\">\u73af\u5883<br \/>\n<\/font><font style=\"color:#000000;\">PC&#8212;cisco 2960 &#8212;cisco 6506\uff08dhcp server\uff09<br \/>\n<\/font><font style=\"color:#000000;\">\u8fd9\u4e24\u5929\u4e00\u76f4\u5728\u6d4b\u8bd5\uff0c\u5728cisco 2960\u5f00\u542f ip dhcp snooping \u529f\u80fd\uff0c\u4e0b\u9762\u7684PC\u5c31\u83b7\u53d6\u4e0d\u5230\u5730\u5740<br \/>\n<\/font><font style=\"color:#000000;\">\u5728cisco 2960\u4e0a\u6293\u5305\uff0c\u53d1\u73b0dhcp_snooping\u5de5\u4f5c\u6b63\u5e38\uff0c\u53ef\u4ee5\u6536\u5230PC\u7684dhcpdiscovery\u5305\uff0cdhcp giaddr\u5b57\u6bb5 0.0.0.0\u3002<br \/>\n<\/font><font style=\"color:#000000;\">\u5728 cisco 6506 \u4e0a\u6293\u5305 \uff0ccisco 2960 \u9001\u4e0a\u6765\u7684dhcp\u8bf7\u6c42\u5305\u88ab\u4e22\u5f03\u4e86<\/font>\u3002  <\/p>\n<p><strong><font style=\"color:#000000;\">\u539f\u56e0\u662f\uff1a<\/font><\/strong><font style=\"color:#000000;\"><br \/>\n<\/font><font style=\"color:#000000;\">\u7531\u4e8e\u9ed8\u8ba4\u60c5\u51b5\u4e0bcisco 2960 ip dhcp snooping information option \u662f\u6253\u5f00\u7684\uff0c\u6b64\u65f6\u4ea4\u6362\u673a\u4f1a\u5728PC\u6765\u7684DHCP\u8bf7\u6c42\u62a5\u6587\u4e2d\u63d2\u5165option82\u5185\u5bb9\uff0c\u53c8\u7531\u4e8ecisco 6506 DHCP\u670d\u52a1\u5668\u4e0ePC\u5904\u4e8e\u540c\u4e00\u4e2aVLAN\u4e2d\uff0c\u6240\u4ee5\u8bf7\u6c42\u6ca1\u6709\u7ecf\u8fc7\u4e2d\u7ee7\u4ee3\u7406<br \/>\n<\/font><font style=\"color:#000000;\">\u5bf9\u4e8ecisco 6506 DHCP\u670d\u52a1\u5668\u6765\u8bf4\uff0c\u5982\u679c\u5b83\u6536\u5230\u7684DHCP\u8bf7\u6c42\u88ab\u63d2\u5165\u4e86option82\uff0c\u90a3\u4e48\u5b83\u4f1a\u8ba4\u4e3a\u8fd9\u662f\u4e00\u4e2a\u4ece\u4e2d\u7ee7\u4ee3\u7406\u8fc7\u6765\u7684\u8bf7\u6c42\u62a5\u6587\uff0c\u4f46\u662f\u5b83\u68c0\u67e5\u4e86\u8be5\u62a5\u6587\u7684giaddr\u5b57\u6bb5\u5374\u53c8\u53d1\u73b0\u662f0.0.0.0\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u6709\u6548\u7684IP\u5730\u5740\uff0c\u56e0\u6b64\u8be5\u62a5\u6587\u88ab\u8ba4\u4e3a\u201c\u975e\u6cd5\u201d\uff0c\u6240\u4ee5\u5c06\u88ab\u4e22\u5f03\u3002<br \/>\n<\/font><font style=\"color:#323e32;\"><br \/>\n<\/font><strong><font style=\"color:#000000;\">\u89e3\u51b3\u65b9\u6cd5 1<br \/>\n<\/font><\/strong><font style=\"color:#000000;\">\u5728cisco 6506 \u4e0a\u5f00\u542f \u4e2d\u7ee7\u4ee3\u7406 \u4fe1\u4efbReceived DHCP packet may contain relay info option with zero giaddr<\/font><strong><font style=\"color:#000000;\"><br \/>\n<\/font><\/strong><font style=\"color:#000000;\"><br \/>\n<\/font><strong><font style=\"color:#000000;\">\u5728\u5168\u5c40\u4e0b<\/font><\/strong><font style=\"color:#000000;\"><br \/>\n<\/font><font style=\"color:#000000;\">ip dhcp relay information  <\/p>\n<p><\/font><strong><font style=\"color:#000000;\">\u89e3\u51b3\u65b9\u6cd5 2<\/font><\/strong><font style=\"color:#000000;\"><br \/>\n<\/font><font style=\"color:#000000;\">\u5728cisco 2960 \u4e0a\u5173\u95edoption82\u529f\u80fd\uff0c\u56e0\u4e3a\u6211\u4eec\u8fd9\u91cc\u63a5\u5165\u4ea4\u6362\u673a\u548cdhcp server\u4e0d\u7528\u8de8\u7f51\u6bb5\u4e2d\u7ee7 dhcp \u62a5\u6587\u3002  <\/p>\n<p><\/font><strong><font style=\"color:#000000;\">\u5728\u5168\u5c40\u4e0b<\/font><\/strong><font style=\"color:#000000;\"><br \/>\n<\/font><font style=\"color:#000000;\">no ip dhcp snooping information option<\/font><\/p>\n<blockquote>\n<p>\u66f4\u65b0: 2025-03-11 13:41:30<br \/>\n\u539f\u6587: <a href=\"https:\/\/www.yuque.com\/yuhui.net\/network\/os5w0cm4ueyxfp7q\">https:\/\/www.yuque.com\/yuhui.net\/network\/os5w0cm4ueyxfp7q<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>7.8 DHCP snooping\u4fa6\u542c\u6392\u9519 DHCP snooping\u6392\u9519\u7ecf\u5386&#8211;DHCP&#8211;DHCP\u914d\u7f6e&#8211;DHCP\u534f\u8bae&#8211;DHCPsnooping\u6392\u9519\u7ecf\u5386 \u73af\u5883 PC&#8212;cisco 2960 &#8212;cisco 6506\uff08dhcp server\uff09 \u8fd9\u4e24\u5929\u4e00\u76f4\u5728\u6d4b\u8bd5\uff0c\u5728cisco 2960\u5f00\u542f ip dhcp snooping \u529f\u80fd\uff0c\u4e0b\u9762\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,3],"tags":[79,85],"class_list":["post-479","post","type-post","status-publish","format-standard","hentry","category-ciscoluyouyujiaohuan","category-interface","tag-shiyan","tag-cisco"],"_links":{"self":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts\/479","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/comments?post=479"}],"version-history":[{"count":0,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts\/479\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/media?parent=479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/categories?post=479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/tags?post=479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}