{"id":1555,"date":"2011-08-24T19:27:36","date_gmt":"2011-08-24T11:27:36","guid":{"rendered":"http:\/\/www.slyar.com\/blog\/?p=1555"},"modified":"2022-07-03T15:51:42","modified_gmt":"2022-07-03T22:51:42","slug":"ccnp-labs-l3-dhcp-relay","status":"publish","type":"post","link":"http:\/\/www.slyar.com\/blog\/ccnp-labs-l3-dhcp-relay.html","title":{"rendered":"CCNP\u5b9e\u9a8c:\u4e09\u5c42\u4ea4\u6362\u5b9e\u73b0VLAN\u95f4DHCP\u4e2d\u7ee7\u4ee3\u7406"},"content":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a<span style=\"color: #0000ff;\">\u59dc\u5357(Slyar) <\/span>\u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (<a title=\"Slyar\" href=\"http:\/\/www.slyar.com\" target=\"_blank\" rel=\"noopener\">www.slyar.com<\/a>) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u73af\u5883\u3011<\/span><\/p>\n<p>Cisco Packet Tracer 5.3.2<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u76ee\u7684\u3011<\/span><\/p>\n<p>\u4f7f\u7528\u4e09\u5c42\u4ea4\u6362+DHCP\u4e2d\u7ee7\u4ee3\u7406\u6280\u672f\u89e3\u51b3\u591a\u4e2aVLAN\u5171\u4eab\u540c\u4e00DHCP\u670d\u52a1\u5668\u95ee\u9898\u3002<\/p>\n<p>\u7531\u4e8e\u5212\u5206\u4e86VLAN\uff0c\u53ef\u4ee5\u6709\u6548\u51cf\u5c11ARP\u6b3a\u9a97\u53ca\u5e7f\u64ad\u98ce\u66b4\u7684\u5f71\u54cd\uff0c\u5982\u679c\u7ed3\u5408\u4e0aDAI\u7b49\u6280\u672f\u5c31\u53ef\u4ee5\u5c06ARP\u6b3a\u9a97\u653b\u51fb\u7684\u5371\u5bb3\u964d\u5230\u6700\u4f4e\uff0c\u8fd9\u91cc\u7531\u4e8e\u6a21\u62df\u5668\u65e0\u6cd5\u505aDAI\uff0c\u5b9e\u9a8c\u4ee5\u540e\u7528\u771f\u673a\u505a\u3002\u8fd9\u91cc\u591a\u4e2aVLAN\u4f7f\u7528\u540c\u4e00\u4e2aDHCP\u670d\u52a1\u5668\uff0c\u65e2\u662f\u4ee5\u540eDAI\u7684\u524d\u63d0\uff0c\u540c\u65f6\u4e5f\u89e3\u51b3\u4e86\u968f\u610f\u4fee\u6539IP\u5e26\u6765\u7684\u5730\u5740\u51b2\u7a81\u95ee\u9898\u3002<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u62d3\u6251\u3011<\/span><\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_184635.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1556\" title=\"\u4e09\u5c42\u4ea4\u6362\u5b9e\u73b0DHCP\u4e2d\u7ee7\u4ee3\u7406\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_184635.png\" alt=\"\" width=\"590\" height=\"397\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_184635.png 590w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_184635-150x101.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_184635-300x202.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/a><\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u63cf\u8ff0\u3011<\/span><\/p>\n<p>\u6a21\u62df\u5b66\u6821\u5b9e\u9a8c\u5ba4\uff0c\u4f7f\u7528\u4e00\u53f0DHCP\u670d\u52a1\u5668(8.8.8.8 in VLAN 100)\uff0c\u4e00\u53f03560\u4e09\u5c42\u4ea4\u6362\u673a\uff0c\u4e0b\u9762\u8fde\u63a54\u4e2aC2950\u63a5\u5165\u5c42\u4ea4\u6362\u673a\uff0c\u57283560\u4e0a\u5212\u52064\u4e2aVLAN\uff0c\u5c06\u63a5\u5165\u5c42\u4ea4\u6362\u673a\u7aef\u53e3\u5206\u522b\u52a0\u5165VLAN\uff0c\u5404\u4e3b\u673a\u5747\u4f7f\u7528DHCP\u81ea\u52a8\u83b7\u53d6IP\u5730\u5740\u3002<\/p>\n<p><!--more--><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u6b65\u9aa4\u3011<\/span><\/p>\n<p><span style=\"color: #0000ff;\">1\u3001\u914d\u7f6eDHCP\u670d\u52a1\u5668\uff0c\u8bbe\u7f6e\u670d\u52a1\u5668IP\u5730\u5740\u4e3a8.8.8.8\/24\uff0c\u7f51\u5173\u5730\u5740\u4e3a8.8.8.254\u3002<\/span>DHCP IP\u5730\u5740\u6c60\u5982\u4e0b\u5212\u5206\uff1a<\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_183453.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1557\" title=\"DHCP\u5730\u5740\u6c60\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_183453.png\" alt=\"\" width=\"588\" height=\"104\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_183453.png 588w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_183453-150x27.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_183453-300x53.png 300w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/a><\/p>\n<p>\u7531\u4e8ePT\u6a21\u62df\u5668\u81ea\u8eab\u7684\u95ee\u9898\uff0c\u9ed8\u8ba4\u5730\u5740\u6c60\u65e0\u6cd5\u6539\u540d\uff0c\u771f\u673a\u73af\u5883\u4e0b\u9ed8\u8ba4\u5730\u5740\u6c60\u5373VLAN 10\u7684\u5730\u5740\u6c60\uff0c\u5404VLAN\u7684\u7f51\u5173\u5206\u522b\u4e3a192.168.10.254\u3001192.168.20.254\u3001192.168.30.254\u3001192.168.40.254\uff0c\u8d77\u59cbIP\u4fee\u6539\u4e3a\u4e0d\u540c\uff0c\u65b9\u4fbf\u7b49\u4f1a\u9a8c\u8bc1\u3002<\/p>\n<p><span style=\"color: #0000ff;\">2\u3001\u914d\u7f6e\u4e09\u5c42\u4ea4\u6362\u673a\uff0c\u521b\u5efaVLAN\uff0c\u5c06\u7aef\u53e3\u52a0\u5165\u5bf9\u5e94VLAN\uff0c\u5176\u4e2dDHCP\u670d\u52a1\u5668\u6240\u5728\u7684\u7aef\u53e3\u52a0\u5165VLAN 100(\u4e0d\u9009\u62e9VLAN 1\u662f\u4ece\u5b89\u5168\u65b9\u9762\u7740\u60f3)<\/span><\/p>\n<p>interface FastEthernet0\/1<br \/>\nswitchport access vlan 10<br \/>\nswitchport mode access<br \/>\n!<br \/>\ninterface FastEthernet0\/2<br \/>\nswitchport access vlan 20<br \/>\nswitchport mode access<br \/>\n!<br \/>\ninterface FastEthernet0\/3<br \/>\nswitchport access vlan 30<br \/>\nswitchport mode access<br \/>\n!<br \/>\ninterface FastEthernet0\/4<br \/>\nswitchport access vlan 40<br \/>\nswitchport mode access<br \/>\n!<br \/>\ninterface FastEthernet0\/24<br \/>\nswitchport access vlan 100<br \/>\nswitchport mode access<br \/>\n!<\/p>\n<p><span style=\"color: #0000ff;\">3\u3001\u542f\u7528\u4e09\u5c42\u4ea4\u6362\u7684\u8def\u7531\u529f\u80fd\uff0c\u914d\u7f6e\u76f8\u5e94\u7684Vlan\u7aef\u53e3\u4ee5\u53caDHCP\u4e2d\u7ee7\u3002<\/span><\/p>\n<p><span style=\"color: #ff0000;\">DHCP\u4e2d\u7ee7\u7684\u914d\u7f6e\u5341\u5206\u7b80\u5355\uff0c\u53ea\u8981\u5728\u6bcf\u4e2aVLAN\u4e0b\u4f7f\u7528\"ip helper-address\"\u6307\u5b9aDHCP\u670d\u52a1\u5668\u7684\u5730\u5740\u5373\u53ef\uff0c\u7531\u4e8e\u6211\u4eec\u5728DHCP\u670d\u52a1\u5668\u4e0a\u914d\u7f6e\u4e86\u591a\u4e2a\u5730\u5740\u6c60(\u5373DHCP\u4f5c\u7528\u57df)\uff0c\u56e0\u6b64\u4e2d\u7ee7\u6570\u636e\u5305\u4e2d\u7684\u7f51\u5173IP\u5b57\u6bb5(GIADDR)\u4e2d\u7684\u5730\u5740\u4f1a\u6807\u8bc6\u4ece\u54ea\u4e2aDHCP\u4f5c\u7528\u57df\u63d0\u4f9bIP\u5730\u5740\u79df\u7ea6\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\u4f1a\u9009\u62e9\u7f51\u5173\u5730\u5740\u4e00\u81f4\u7684\u4f5c\u7528\u57df\u3002<\/span><\/p>\n<p>ip routing<\/p>\n<p>interface Vlan10<br \/>\nip address 192.168.10.254 255.255.255.0<br \/>\nip helper-address 8.8.8.8<br \/>\n!<br \/>\ninterface Vlan20<br \/>\nip address 192.168.20.254 255.255.255.0<br \/>\nip helper-address 8.8.8.8<br \/>\n!<br \/>\ninterface Vlan30<br \/>\nip address 192.168.30.254 255.255.255.0<br \/>\nip helper-address 8.8.8.8<br \/>\n!<br \/>\ninterface Vlan40<br \/>\nip address 192.168.40.254 255.255.255.0<br \/>\nip helper-address 8.8.8.8<br \/>\n!<br \/>\n<span style=\"color: #ff0000;\">\/\/\u7531DHCP\u4e2d\u7ee7\u7684\u539f\u7406\uff0c\u4e09\u5c42\u4ea4\u6362\u673a\u4e00\u5b9a\u8981\u6709\u5230DHCP\u670d\u52a1\u5668\u7684\u8def\u7531\u4fe1\u606f<\/span><br \/>\n<span style=\"color: #ff0000;\">interface Vlan100<\/span><br \/>\n<span style=\"color: #ff0000;\"> ip address 8.8.8.254 255.255.255.0<\/span><br \/>\n!<\/p>\n<p><span style=\"color: #0000ff;\">4\u3001\u67e5\u770b\u4e09\u5c42\u4ea4\u6362\u8def\u7531\u4fe1\u606f<\/span><\/p>\n<p>Switch#sh ip ro<br \/>\n8.0.0.0\/24 is subnetted, 1 subnets<br \/>\nC\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8.8.8.0 is directly connected, Vlan100<br \/>\nC\u00a0\u00a0\u00a0 192.168.10.0\/24 is directly connected, Vlan10<br \/>\nC\u00a0\u00a0\u00a0 192.168.20.0\/24 is directly connected, Vlan20<br \/>\nC\u00a0\u00a0\u00a0 192.168.30.0\/24 is directly connected, Vlan30<br \/>\nC\u00a0\u00a0\u00a0 192.168.40.0\/24 is directly connected, Vlan40<\/p>\n<p><span style=\"color: #0000ff;\">5\u3001\u9a8c\u8bc1DHCP\u5206\u914d\u72b6\u51b5<\/span><\/p>\n<p>PC0:192.168.10.1\/24<\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1559\" title=\"PC0\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928.png\" alt=\"\" width=\"504\" height=\"347\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928.png 504w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928-150x103.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928-300x207.png 300w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191928-220x150.png 220w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/a><\/p>\n<p>PC1:192.168.20.2\/24<\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1560\" title=\"PC1\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937.png\" alt=\"\" width=\"508\" height=\"346\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937.png 508w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937-150x102.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937-300x204.png 300w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191937-220x150.png 220w\" sizes=\"auto, (max-width: 508px) 100vw, 508px\" \/><\/a><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956.png\"><\/a><\/p>\n<p>PC2:192.168.30.50\/24<\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1561\" title=\"PC2\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948.png\" alt=\"\" width=\"504\" height=\"347\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948.png 504w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948-150x103.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948-300x207.png 300w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191948-220x150.png 220w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/a><\/p>\n<p>PC3:192.168.40.100\/24<\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1558\" title=\"PC3\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956.png\" alt=\"\" width=\"506\" height=\"347\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956.png 506w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956-150x103.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956-300x206.png 300w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-24_191956-220x150.png 220w\" sizes=\"auto, (max-width: 506px) 100vw, 506px\" \/><\/a><\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"http:\/\/www.slyar.com\/blog\">Slyar Home<\/a> &raquo; <a href=\"http:\/\/www.slyar.com\/blog\/ccnp-labs-l3-dhcp-relay.html\">CCNP\u5b9e\u9a8c:\u4e09\u5c42\u4ea4\u6362\u5b9e\u73b0VLAN\u95f4DHCP\u4e2d\u7ee7\u4ee3\u7406<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a\u59dc\u5357(Slyar) \u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (www.slyar.com) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002 \u3010\u5b9e\u9a8c\u73af\u5883\u3011 Cisco Packet Tracer 5.3.2 \u3010\u5b9e\u9a8c\u76ee\u7684\u3011 \u4f7f\u7528\u4e09\u5c42\u4ea4\u6362+DHCP\u4e2d\u7ee7\u4ee3\u7406\u6280\u672f\u89e3\u51b3\u591a\u4e2aVLAN\u5171 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1104],"tags":[908,915,905,300],"class_list":["post-1555","post","type-post","status-publish","format-standard","hentry","category-computer-networks","tag-cisco","tag-dhcp","tag-905","tag-300"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"CCNP\u5b9e\u9a8c:\u4e09\u5c42\u4ea4\u6362\u5b9e\u73b0VLAN\u95f4DHCP\u4e2d\u7ee7\u4ee3\u7406\uff0c\u89e3\u51b3\u56ed\u533a\u7f51\u5185\u5e7f\u64ad\u98ce\u66b4\u53caARP\u653b\u51fb\u8303\u56f4\u8fc7\u5927\u95ee\u9898\uff0c\u4f7f\u7528\u4e00\u53f0DHCP\u670d\u52a1\u5668\u5206\u914dIP\u3002\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Slyar\"\/>\n\t<meta name=\"keywords\" 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