{"id":471,"date":"2025-10-22T09:58:38","date_gmt":"2025-10-22T01:58:38","guid":{"rendered":"https:\/\/www.youvii.site\/?p=471"},"modified":"2025-10-22T09:58:38","modified_gmt":"2025-10-22T01:58:38","slug":"70dhcpv4gongzuoyuanli","status":"publish","type":"post","link":"https:\/\/www.youvii.site\/index.php\/archives\/70dhcpv4gongzuoyuanli","title":{"rendered":"7.0DHCPv4\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"

7.DHCPv4\u5de5\u4f5c\u539f\u7406<\/h1>\n

DHCPv4\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef<\/strong><\/p>\n

DHCPv4\u670d\u52a1\u5668\u52a8\u6001\u7684\u4ece\u5730\u5740\u6c60\u4e2d\u5206\u914d\u6216\u51fa\u79dfIPv4\u5730\u5740\uff0c\u4f7f\u7528\u671f\u9650\u4e3a\u670d\u52a1\u5668\u9009\u62e9\u7684\u6709\u9650\u65f6\u95f4\u6216\u76f4\u5230\u5ba2\u6237\u7aef\u4e0d\u5728\u9700\u8981\u8be5\u5730\u5740\u3002\u79df\u7528\u65f6\u95f4\u5728\u4efb\u4f55\u5730\u65b9\u901a\u5e38\u90fd\u662f24\u5c0f\u65f6\u5230\u4e00\u5468\u6216\u66f4\u957f\u65f6\u95f4\u3002\u79df\u671f\u5c4a\u6ee1\u540e\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u7533\u8bf7\u53e6\u4e00\u4e2a\u5730\u5740\uff0c\u4f46\u901a\u5e38\u662f\u628a\u540c\u4e00\u5730\u5740\u91cd\u65b0\u5206\u914d\u56de\u5ba2\u6237\u7aef\u3002<\/p>\n

\"1741671430055-c954a5ad-90d1-400c-a68d-2fe8e5a6726d.png\"<\/p>\n

1\u3001DHCPv4\u79df\u501f\u5730\u5740\u7684\u8fc7\u7a0b\u59cb\u4e8e\u5ba2\u6237\u7aef\u5411DHCP\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u670d\u52a1\u7684\u6d88\u606f\u3002<\/p>\n

2\u3001\u5982\u679c\u6709DHCPv4\u670d\u52a1\u5668\u8282\u540e\u5230\u8fd9\u6761\u6d88\u606f\uff0c\u8fd9\u53f0\u670d\u52a1\u5668\u5c31\u4f1a\u4f7f\u7528IPv4\u5730\u5740\u548c\u5176\u4ed6\u53ef\u80fd\u7684\u7f51\u7edc\u914d\u7f6e\u4fe1\u606f\u4f5c\u51fa\u54cd\u5e94\u3002<\/p>\n

DHCPv4\u7684\u5de5\u4f5c\u65b9\u5f0f<\/em><\/p>\n

\u5728\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u6a21\u5f0f\u4e0b\uff0c\u5f53\u5ba2\u6237\u7aef\u4e0eDHCPv4\u670d\u52a1\u5668\u901a\u4fe1\u65f6\uff1b\u670d\u52a1\u5668\u4f1a\u5c06IPv4\u5730\u5740\u5206\u914d\u6216\u51fa\u79df\u7ed9\u5ba2\u6237\u7aef\uff0c\u7136\u540e\u5ba2\u6237\u7aef\u4f7f\u7528\u62ff\u5230\u7684IPv4\u5730\u5740\u94fe\u63a5\u5230\u7f51\u7edc\uff0c\u76f4\u5230\u79df\u671f\u6ee1\u3002\u5ba2\u6237\u7aef\u5fc5\u987b\u5b9a\u671f\u8054\u7cfbDHCP\u670d\u52a1\u5668\u4ee5\u5ef6\u7eed\u79df\u671f\u3002\u8fd9\u79cd\u79df\u7528\u673a\u5236\u786e\u4fdd\u79fb\u52a8\u6216\u5173\u95ed\u7684\u5ba2\u6237\u7aef\u4e0d\u4fdd\u7559\u5b83\u4eec\u4e0d\u518d\u9700\u8981\u7684\u5730\u5740\u3002\u79df\u671f\u5c4a\u6ee1\u540e\uff0cDHCP\u670d\u52a1\u5668\u4f1a\u5c06\u5730\u5740\u8fd4\u56de\u5730\u5740\u6c60\uff0c\u82e5\u6709\u5fc5\u8981\u53ef\u5c06\u5176\u518d\u6b21\u5206\u914d\u3002<\/p>\n

\u83b7\u5f97\u79df\u7ea6\u7684\u6b65\u9aa4<\/p>\n

\u5f53\u5ba2\u6237\u7aef\u542f\u52a8\uff08\u6216\u52a0\u5165\u7f51\u7edc\u65f6\uff09\u4f1a\uff1a<\/p>\n

1\u3001DHCP\u53d1\u73b0 (DISCOVER)<\/p>\n

\u5ba2\u6237\u7aef\u4f7f\u7528\u5305\u542b\u81ea\u5df1MAC\u5730\u5740\u7684\u5e7f\u64adDHCPDISCOVER\u6d88\u606f\u542f\u52a8\u6574\u4e2a\u8fc7\u7a0b\uff0c\u67e5\u627e\u53ef\u7528DHCPv4\u670d\u52a1\u5668\u3002\u56e0\u4e3a\u5ba2\u6237\u7aef\u542f\u52a8\u65f6\u6ca1\u6709\u6709\u6548\u7684IPv4\u4fe1\u606f\uff0c\u56e0\u6b64\u5b83\u5c06\u4f7f\u7528\u7b2c2\u5c42\u548c\u7b2c3\u5c42\u5e7f\u64ad\u5730\u5740\u4e0e\u670d\u52a1\u5668\u901a\u4fe1\u3002DHCPDISCOVER\u6d88\u606f\u7684\u76ee\u7684\u662f\u5728\u7f51\u7edc\u4e2d\u67e5\u627eDHCPv4\u670d\u52a1\u5668<\/p>\n

2\u3001DHCP\u63d0\u4f9b (OFFER)<\/p>\n

\u5f53DHCPv4\u670d\u52a1\u5668\u6536\u5230DHCPDISCOVER\u6d88\u606f\u65f6\uff0c\u4f1a\u4fdd\u7559\u4e00\u4e2a\u53ef\u7528\u7684IPv4\u5730\u5740\u4ee5\u79df\u8d41\u7ed9\u5ba2\u6237\u7aef\u3002\u670d\u52a1\u5668\u8fd8\u4f1a\u521b\u5efa\u4e00\u4e2aARP\u6761\u76ee\uff0c\u8be5\u6761\u76ee\u5305\u542b\u8bf7\u6c42\u5ba2\u6237\u7aef\u7684MAC\u5730\u5740\u548c\u5ba2\u6237\u7aef\u79df\u7528IPv4\u5730\u5740\u3002DHCPv4\u670d\u52a1\u5668\u4f1a\u628a\u7ed1\u5b9aDHCPOFFER\u6d88\u606f\u53d1\u9001\u5230\u8bf7\u6c42\u5ba2\u6237\u7aef\u3002<\/p>\n

3\u3001DHCP\u8bf7\u6c42 (REQUEST)<\/p>\n

\u5f53\u5ba2\u6237\u7aef\u4ece\u670d\u52a1\u5668\u90a3\u91cc\u6536\u5230DHCPOFFERR\u6d88\u606f\u65f6\uff0c\u5ba2\u6237\u7aef\u5c31\u4f1a\u53d1\u56deDHCPREQUEST\u5e7f\u64ad\u6d88\u606f\u3002\u6b64\u6d88\u606f\u7528\u4e8e\u53d1\u8d77\u79df\u7528\u548c\u79df\u7ea6\u66f4\u65b0\u3002\u7528\u4e8e\u53d1\u8d77\u79df\u7528\u65f6\uff0c\u5c06DHCPREQUEST\u7528\u4f5c\u5df2\u63d0\u4f9b\u53c2\u6570\u6240\u9009\u5b9a\u670d\u52a1\u5668\u7684\u7ed1\u5b9a\u63a5\u53d7\u901a\u77e5\uff0c\u5e76\u9690\u5f0f\u62d2\u7edd\u4efb\u4f55\u5176\u4ed6\u53ef\u80fd\u5df2\u4e3a\u5ba2\u6237\u7aef\u63d0\u4f9b\u4e86\u7ed1\u5b9a\u670d\u52a1\u7684\u670d\u52a1\u5668\u3002<\/p>\n

\u8bb8\u591a\u4f01\u4e1a\u7f51\u7edc\u4f7f\u7528\u591a\u53f0DHCPv4\u670d\u52a1\u5668<\/p>\n

DHCPREQUEST\u6d88\u606f\u4ee5\u5e7f\u64ad\u5f62\u5f0f\u53d1\u9001\uff0c\u5c06\u5df2\u63a5\u53d7\u63d0\u4f9b\u7684\u60c5\u51b5\u544a\u77e5\u6b64DHCPv4\u670d\u52a1\u5668\u548c\u5176\u4ed6DHCPv4\u670d\u52a1\u5668\u3002<\/p>\n

4\u3001DHCP\u786e\u8ba4 (ACK)<\/p>\n

\u5728\u63a5\u53d7\u5230DHCPREQUEST\u6d88\u606f\u540e\uff0c\u670d\u52a1\u5668\u5c31\u4f1a\u4f7f\u7528ICMPping\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u8fd9\u4e2a\u5730\u5740\u5f53\u524d\u6ca1\u6709\u8bbe\u5907\u6b63\u5728\u4f7f\u7528\uff0c\u5b83\u4e5f\u4e3a\u5ba2\u6237\u7aef\u79df\u7528\u8be5\u5730\u5740\u521b\u5efa\u51fa\u4e00\u4e2a\u65b0\u7684ARP\u6761\u76ee\uff0c\u7136\u540e\u4f7f\u7528DHCPACK\u6d88\u606f\u8fdb\u884c\u5e94\u7b54\uff0c\u9664\u6d88\u606f\u7c7b\u578b\u5b57\u6bb5\u4e0d\u540c\u5916\uff0cDHCPACK\u6d88\u606f\u4e0eDHCPOFFER\u6d88\u606f\u522b\u65e0\u4e8c\u81f4\u3002\u5728\u5ba2\u6237\u7aef\u63a5\u53d7\u5230DHCPACK\u6d88\u606f\u540e\uff0c\u5b83\u4f1a\u8bb0\u5f55\u914d\u7f6e\u4fe1\u606f\uff0c\u5e76\u5bf9\u5206\u914d\u7ed9\u5b83\u7684\u5730\u5740\u8fdb\u884cARP\u67e5\u627e\u3002\u5982\u679c\u6ca1\u6709\u5bf9ARP\u7684\u5e94\u7b54\uff0c\u5ba2\u6237\u7aef\u5c31\u4f1a\u77e5\u9053iPv4\u5730\u5740\u662f\u6709\u6548\u7684\uff0c\u5e76\u5f00\u59cb\u4f7f\u7528\u8be5\u5730\u5740\u3002<\/p>\n

\"1741671430061-8e504a2d-7fe8-4c03-9e98-74e999b4f9ec.png\"<\/p>\n

\u7eed\u8ba2\u79df\u7ea6\u7684\u6b65\u9aa4<\/em><\/p>\n

1\u3001DHCP\u8bf7\u6c42\uff08REQUEST\uff09<\/p>\n

\u79df\u671f\u6ee1\u540e\uff0c\u5ba2\u6237\u7aef\u628aREQUEST\u6d88\u606f\u76f4\u63a5\u53d1\u9001\u5230\u6700\u521d\u63d0\u4f9bIPv4\u5730\u5740\u7684\u90a3\u53f0DHCPv4\u670d\u52a1\u5668\u3002\u5982\u679c\u5728\u5236\u5b9a\u7684\u65f6\u95f4\u5185\u6ca1\u6709\u6536\u5230ACK\uff0c\u5ba2\u6237\u7aef\u4f1a\u5e7f\u64ad\u53e6\u4e00\u4e2aREQUEST\uff0c\u5982\u6b64\u53e6\u5916\u4e00\u4e2aDHCPv4\u670d\u52a1\u5668\u4fbf\u53ef\u7eed\u5c55\u79df\u671f\u3002<\/p>\n

2\u3001DHCP\u786e\u8ba4\uff08ACK\uff09<\/p>\n

\u5728\u63a5\u53d7\u5230REQUEST\u6d88\u606f\u540e\uff0c\u670d\u52a1\u5668\u4f1a\u8fd4\u56de\u4e00\u4e2aACK\u6d88\u606f\u6765\u9a8c\u8bc1\u79df\u7528\u4fe1\u606f\u3002<\/p>\n

\u8db3\u4ee5\uff1a\u6839\u636e IETF RFC 2131 \uff0c\u4e3b\u8981OFFER\u548cACL\u53ef\u4ee5\u4ee5\u5355\u64ad\u6216\u5e7f\u64ad\u5f62\u5f0f\u53d1\u9001\u3002<\/p>\n

\"1741671430078-6244e0bc-bdea-43a9-a80c-f301bbcff19c.png\"<\/p>\n

\n

\u66f4\u65b0: 2025-03-11 13:37:20
\n\u539f\u6587: https:\/\/www.yuque.com\/yuhui.net\/network\/gp0bxcrigv3kn9u0<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

7.DHCPv4\u5de5\u4f5c\u539f\u7406 DHCPv4\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef DHCPv4\u670d\u52a1\u5668\u52a8\u6001\u7684\u4ece\u5730\u5740\u6c60\u4e2d\u5206\u914d\u6216\u51fa\u79dfIPv4\u5730\u5740\uff0c\u4f7f\u7528\u671f\u9650\u4e3a\u670d\u52a1\u5668\u9009\u62e9\u7684\u6709\u9650\u65f6\u95f4\u6216\u76f4\u5230\u5ba2\u6237\u7aef\u4e0d\u5728\u9700\u8981\u8be5\u5730\u5740\u3002\u79df\u7528\u65f6\u95f4\u5728\u4efb\u4f55\u5730\u65b9\u901a\u5e38\u90fd\u662f24\u5c0f\u65f6\u5230\u4e00\u5468\u6216\u66f4\u957f\u65f6\u95f4\u3002\u79df\u671f\u5c4a\u6ee1\u540e\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u7533\u8bf7\u53e6\u4e00\u4e2a\u5730\u5740\uff0c\u4f46\u901a\u5e38\u662f\u628a\u540c\u4e00\u5730\u5740\u91cd\u65b0\u5206\u914d\u56de\u5ba2\u6237\u7aef\u3002 1\u3001DHCPv4\u79df\u501f\u5730\u5740\u7684\u8fc7\u7a0b\u59cb\u4e8e\u5ba2\u6237\u7aef\u5411DHCP\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u670d\u52a1\u7684\u6d88\u606f\u3002 2\u3001\u5982\u679c\u6709DHCPv4\u670d […]<\/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-471","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\/471","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=471"}],"version-history":[{"count":0,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts\/471\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/media?parent=471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/categories?post=471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/tags?post=471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}