{"id":589,"date":"2025-12-11T11:04:55","date_gmt":"2025-12-11T03:04:55","guid":{"rendered":"https:\/\/www.axeuh.com\/?p=589"},"modified":"2025-12-11T11:17:57","modified_gmt":"2025-12-11T03:17:57","slug":"dhcp%e4%b8%ad%e7%bb%a7","status":"publish","type":"post","link":"https:\/\/www.axeuh.com\/index.php\/2025\/12\/11\/dhcp%e4%b8%ad%e7%bb%a7\/","title":{"rendered":"DHCP\u4e2d\u7ee7"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.axeuh.com\/wp-content\/uploads\/2025\/12\/image-1024x404.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"404\" data-original=\"https:\/\/www.axeuh.com\/wp-content\/uploads\/2025\/12\/image-1024x404.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-591\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-jetpack-markdown\"><p>\u76ee\u6807\u662f\u914d\u7f6e DHCP \u4e2d\u7ee7\uff08DHCP Relay\uff09\uff0c\u8ba9\u5de6\u8fb9\u7684 PC \u80fd\u591f\u901a\u8fc7\u53f3\u8fb9\u7684 Server2\uff08DHCP \u670d\u52a1\u5668\uff09\u81ea\u52a8\u83b7\u53d6 IP \u5730\u5740\u3002<\/p>\n<hr>\n<h2><strong>1. \u62d3\u6251\u89e3\u6790\u4e0e IP \u89c4\u5212<\/strong><\/h2>\n<p>\u6839\u636e\u4f60\u7ed9\u51fa\u7684 IP \u5730\u5740\uff0c\u6211\u6574\u7406\u5982\u4e0b\uff1a<\/p>\n<h3><strong>RA\uff08\u8def\u7531\u5668 A\uff09<\/strong><\/h3>\n<ul>\n<li><strong>F0\/0<\/strong>\uff1a<code>172.35.16.1<\/code> \u2014\u2014 \u4e0b\u8fde SW1 \u2192 PC1\u3001PC2\uff08\u5e94\u5c5e\u4e8e <code>172.35.16.0\/24<\/code>\uff09<\/li>\n<li><strong>F1\/0<\/strong>\uff1a<code>172.35.18.1<\/code> \u2014\u2014 \u4e0b\u8fde SW2 \u2192 PC3\u3001PC4\uff08\u5e94\u5c5e\u4e8e <code>172.35.18.0\/24<\/code>\uff09<\/li>\n<li><strong>Se2\/0<\/strong>\uff1a<code>10.35.12.2<\/code> \u2014\u2014 \u8fde\u63a5 RB \u7684 Se2\/0\uff08WAN \u94fe\u8def\uff09<\/li>\n<\/ul>\n<h3><strong>RB\uff08\u8def\u7531\u5668 B\uff09<\/strong><\/h3>\n<ul>\n<li><strong>Se2\/0<\/strong>\uff1a<code>10.35.12.1<\/code><\/li>\n<li><strong>F0\/0<\/strong>\uff1a<code>192.35.8.1<\/code> \u2014\u2014 \u4e0b\u8fde SW3 \u2192 Server1\u3001Server2\uff08<code>192.35.8.0\/24<\/code>\uff09<\/li>\n<li><strong>F1\/0<\/strong>\uff1a<code>192.35.9.1<\/code> \u2014\u2014 \u4e0b\u8fde SW4 \u2192 Server3\uff08<code>192.35.9.0\/24<\/code>\uff09<\/li>\n<\/ul>\n<hr>\n<h3><strong>\u670d\u52a1\u5668 IP<\/strong><\/h3>\n<ul>\n<li><strong>Server1<\/strong>\uff08DNS\uff09\uff1a<code>192.35.8.2<\/code><\/li>\n<li><strong>Server2<\/strong>\uff08DHCP\uff09\uff1a<code>192.35.8.3<\/code><\/li>\n<li><strong>Server3<\/strong>\uff08WWW\uff09\uff1a<code>192.35.9.2<\/code><\/li>\n<\/ul>\n<p><strong>\u6ce8\u610f<\/strong>\uff1aServer3 \u7684 IP \u4f60\u5199\u4e86\u4e24\u6b21\uff08\u4e00\u6b21 <code>192.35.8.3<\/code> \u4e00\u6b21 <code>192.35.9.2<\/code>\uff09\uff0c\u6309\u540e\u9762\u7ed9\u7684\uff0c\u5e94\u8be5\u662f <code>192.35.9.2<\/code>\uff0cDHCP \u670d\u52a1\u5668\u662f Server2\uff08<code>192.35.8.3<\/code>\uff09\u3002<\/p>\n<hr>\n<h2><strong>2. \u914d\u7f6e\u6b65\u9aa4<\/strong><\/h2>\n<h3><strong>\u7b2c\u4e00\u6b65\uff1a\u914d\u7f6e\u8def\u7531\u5668\u63a5\u53e3\u4e0e\u8def\u7531<\/strong><\/h3>\n<p>\u4e24\u4e2a\u8def\u7531\u5668\u4e4b\u95f4\u8981\u80fd\u4e92\u901a\uff0c\u4e14 DHCP \u8bf7\u6c42\u80fd\u8de8\u7f51\u6bb5\u8f6c\u53d1\u3002<\/p>\n<h4><strong>RA \u914d\u7f6e<\/strong><\/h4>\n<pre><code class=\"language-cisco\">enable\nconfigure terminal\n\n! \u914d\u7f6e\u63a5\u53e3 IP\ninterface f0\/0\nip address 172.35.16.1 255.255.255.0\nno shutdown\n\ninterface f1\/0\nip address 172.35.18.1 255.255.255.0\nno shutdown\n\ninterface serial 2\/0\nip address 10.35.12.2 255.255.255.0\nclock rate 64000  ! \u5982\u679c\u662f DCE \u7aef\uff08\u770b\u62d3\u6251\u4e2d\u54ea\u8fb9\u662f DCE\uff09\nno shutdown\n\n! \u914d\u7f6e\u9ed8\u8ba4\u8def\u7531\u6216\u9759\u6001\u8def\u7531\u6307\u5411 RB\nip route 192.35.8.0 255.255.255.0 10.35.12.1\nip route 192.35.9.0 255.255.255.0 10.35.12.1\n\nend\nwrite\n<\/code><\/pre>\n<h4><strong>RB \u914d\u7f6e<\/strong><\/h4>\n<pre><code class=\"language-cisco\">enable\nconfigure terminal\n\ninterface serial 2\/0\nip address 10.35.12.1 255.255.255.0\nno shutdown\n\ninterface f0\/0\nip address 192.35.8.1 255.255.255.0\nno shutdown\n\ninterface f1\/0\nip address 192.35.9.1 255.255.255.0\nno shutdown\n\n! \u56de\u7a0b\u8def\u7531\u6307\u5411 RA\nip route 172.35.16.0 255.255.255.0 10.35.12.2\nip route 172.35.18.0 255.255.255.0 10.35.12.2\n\nend\nwrite\n<\/code><\/pre>\n<hr>\n<h3><strong>\u7b2c\u4e8c\u6b65\uff1a\u5728 RA \u4e0a\u914d\u7f6e DHCP \u4e2d\u7ee7<\/strong><\/h3>\n<p>\u8981\u8ba9 PC1\uff5ePC4 \u4ece Server2\uff08<code>192.35.8.3<\/code>\uff09\u83b7\u53d6 IP\uff0c\u9700\u8981\u5728 RA \u7684\u4e24\u4e2a LAN \u63a5\u53e3\u4e0a\u914d\u7f6e <code>ip helper-address<\/code>\u3002<\/p>\n<p><strong>\u5728 RA \u4e0a\uff1a<\/strong><\/p>\n<pre><code class=\"language-cisco\">configure terminal\n\ninterface f0\/0\nip helper-address 192.35.8.3\n\ninterface f1\/0\nip helper-address 192.35.8.3\n\nend\nwrite\n<\/code><\/pre>\n<p><code>ip helper-address<\/code> \u4f1a\u5c06\u5e7f\u64ad\u7684 DHCP \u8bf7\u6c42\u8f6c\u6362\u4e3a\u5355\u64ad\uff0c\u53d1\u9001\u5230\u6307\u5b9a\u7684 DHCP \u670d\u52a1\u5668\u3002<\/p>\n<hr>\n<h3><strong>\u7b2c\u4e09\u6b65\uff1a\u914d\u7f6e Server2 \u4f5c\u4e3a DHCP \u670d\u52a1\u5668<\/strong><\/h3>\n<p>\u5728 Cisco Packet Tracer \u7684 Server2 \u4e0a\uff1a<\/p>\n<ol>\n<li>\u8fdb\u5165 <strong>Desktop<\/strong> \u9009\u9879\u5361 \u2192 <strong>IP Configuration<\/strong>\u3002<\/li>\n<li>\u8bbe\u7f6e\u9759\u6001 IP\uff1a<code>192.35.8.3<\/code>\uff0c\u5b50\u7f51\u63a9\u7801 <code>255.255.255.0<\/code>\uff0c\u7f51\u5173 <code>192.35.8.1<\/code>\uff0cDNS \u6307\u5411 <code>192.35.8.2<\/code>\uff08Server1\uff09\u3002<\/li>\n<li>\u8fdb\u5165 <strong>Services<\/strong> \u9009\u9879\u5361 \u2192 <strong>DHCP<\/strong>\u3002<\/li>\n<li>\u542f\u7528 DHCP \u670d\u52a1\uff0c\u521b\u5efa\u4e24\u4e2a\u5730\u5740\u6c60\uff1a<\/li>\n<\/ol>\n<h4><strong>\u5730\u5740\u6c60 1\uff08\u7528\u4e8e 172.35.16.0\/24\uff09<\/strong><\/h4>\n<ul>\n<li>Pool Name: <code>Pool_for_16<\/code><\/li>\n<li>Default Gateway: <code>172.35.16.1<\/code><\/li>\n<li>DNS Server: <code>192.35.8.2<\/code><\/li>\n<li>Start IP: <code>172.35.16.10<\/code><\/li>\n<li>Subnet Mask: <code>255.255.255.0<\/code><\/li>\n<li>Max Users: 50<\/li>\n<\/ul>\n<h4><strong>\u5730\u5740\u6c60 2\uff08\u7528\u4e8e 172.35.18.0\/24\uff09<\/strong><\/h4>\n<ul>\n<li>Pool Name: <code>Pool_for_18<\/code><\/li>\n<li>Default Gateway: <code>172.35.18.1<\/code><\/li>\n<li>DNS Server: <code>192.35.8.2<\/code><\/li>\n<li>Start IP: <code>172.35.18.10<\/code><\/li>\n<li>Subnet Mask: <code>255.255.255.0<\/code><\/li>\n<li>Max Users: 50<\/li>\n<\/ul>\n<p>\u4fdd\u5b58\u8bbe\u7f6e\u3002<\/p>\n<hr>\n<h3><strong>\u7b2c\u56db\u6b65\uff1a\u914d\u7f6e Server1 \u4f5c\u4e3a DNS \u670d\u52a1\u5668<\/strong><\/h3>\n<ol>\n<li>\u8bbe\u7f6e\u9759\u6001 IP\uff1a<code>192.35.8.2<\/code>\uff0c\u63a9\u7801 <code>255.255.255.0<\/code>\uff0c\u7f51\u5173 <code>192.35.8.1<\/code>\u3002<\/li>\n<li>\u8fdb\u5165 <strong>Services<\/strong> \u2192 <strong>DNS<\/strong>\u3002<\/li>\n<li>\u542f\u7528 DNS\uff0c\u6dfb\u52a0\u8bb0\u5f55\uff08\u4f8b\u5982 <code>www.example.com<\/code> \u6307\u5411 <code>192.35.9.2<\/code>\uff09\u3002<\/li>\n<\/ol>\n<hr>\n<h3><strong>\u7b2c\u4e94\u6b65\uff1a\u914d\u7f6e PC \u4e3a DHCP \u83b7\u53d6<\/strong><\/h3>\n<p>\u5c06\u6240\u6709 PC\uff08PC1\uff5ePC4\uff09\u7684 IP \u914d\u7f6e\u8bbe\u7f6e\u4e3a <strong>DHCP<\/strong>\u3002<\/p>\n<hr>\n<h3><strong>\u7b2c\u516d\u6b65\uff1a\u6d4b\u8bd5<\/strong><\/h3>\n<ol>\n<li>\u5728 PC \u7684\u547d\u4ee4\u884c\u4e2d\u6267\u884c <code>ipconfig \/renew<\/code>\uff08\u6216\u7b49\u5f85\u81ea\u52a8\u83b7\u53d6\uff09\u3002<\/li>\n<li>\u7528 <code>ping<\/code> \u6d4b\u8bd5\u5230\u7f51\u5173\u3001\u5230 Server3 \u7684\u8fde\u901a\u6027\u3002<\/li>\n<li>\u5728 PC \u4e0a\u5c1d\u8bd5\u7528\u57df\u540d\u8bbf\u95ee Web \u670d\u52a1\u5668\uff08\u5982\u679c\u914d\u7f6e\u4e86 DNS\uff09\u3002<\/li>\n<\/ol>\n<hr>\n<h3><strong>\u5e38\u89c1\u6392\u9519<\/strong><\/h3>\n<ul>\n<li>\u786e\u4fdd\u8def\u7531\u5668\u4e4b\u95f4 <code>ping 10.35.12.1<\/code> \u548c <code>ping 10.35.12.2<\/code> \u4e92\u901a\u3002<\/li>\n<li>\u68c0\u67e5 <code>show ip route<\/code> \u786e\u4fdd\u8def\u7531\u8868\u6709\u5230\u5bf9\u65b9\u5b50\u7f51\u7684\u8def\u7531\u3002<\/li>\n<li>\u5728 RA \u4e0a\u7528 <code>debug ip dhcp server events<\/code>\uff08\u5982\u679c\u652f\u6301\uff09\u67e5\u770b DHCP \u4e2d\u7ee7\u662f\u5426\u5de5\u4f5c\u3002<\/li>\n<li>\u786e\u4fdd Server2 \u7684 DHCP \u670d\u52a1\u5df2\u5f00\u542f\uff0c\u4e14\u5730\u5740\u6c60\u7684\u7f51\u7edc\u4e0e\u8bf7\u6c42\u7684\u7f51\u5173\u5339\u914d\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u4f60\u5728\u914d\u7f6e\u8fc7\u7a0b\u4e2d\u6709\u5177\u4f53\u54ea\u4e00\u6b65\u4e0d\u6210\u529f\uff0c\u53ef\u4ee5\u544a\u8bc9\u6211\uff0c\u6211\u53ef\u4ee5\u5e2e\u4f60\u7ec6\u5316\u6392\u9519\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-67b8b1ec-0584-4966-ad3b-9034deeb6469\" href=\"https:\/\/www.axeuh.com\/wp-content\/uploads\/2025\/12\/DHCP\u4e2d\u7ee7.zip\">DHCP\u4e2d\u7ee7<\/a><a href=\"https:\/\/www.axeuh.com\/wp-content\/uploads\/2025\/12\/DHCP\u4e2d\u7ee7.zip\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-67b8b1ec-0584-4966-ad3b-9034deeb6469\">\u4e0b\u8f7d<\/a><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[16],"tags":[17],"class_list":["post-589","post","type-post","status-publish","format-standard","hentry","category-16","tag-17"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/posts\/589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/comments?post=589"}],"version-history":[{"count":3,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/posts\/589\/revisions"}],"predecessor-version":[{"id":594,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/posts\/589\/revisions\/594"}],"wp:attachment":[{"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/media?parent=589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/categories?post=589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.axeuh.com\/index.php\/wp-json\/wp\/v2\/tags?post=589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}