\u5f53\u7136\uff0c\u5728\u5168\u90e8\u662fCisco\u4ea4\u6362\u7f51\u7edc\u91cc\uff0c\u53ef\u4ee5\u901a\u8fc7\u5e2e\u5b9a\u6bcf\u53f0\u8bbe\u5907\u7684ip\u548cmac\u5730\u5740\u53ef\u4ee5\u89e3\u51b3\u3002\u4f46\u662f\u8fd9\u6837\u505a\u6bd4\u8f83\u9ebb\u70e6\uff0c\u53ef\u4ee5\u7528\u601d\u79d1 Dynamic ARP Inspection \u673a\u5236\u89e3\u51b3\u3002
\n\u9632\u8303\u65b9\u6cd5<\/p>\n
\u601d\u79d1 Dynamic ARP Inspection (DAI)\u5728\u4ea4\u6362\u673a\u4e0a\u63d0\u4f9bIP\u5730\u5740\u548cMAC\u5730\u5740\u7684\u7ed1\u5b9a\uff0c \u5e76\u52a8\u6001\u5efa\u7acb\u7ed1\u5b9a\u5173\u7cfb\u3002DAI \u4ee5 DHCP Snooping\u7ed1\u5b9a\u8868\u4e3a\u57fa\u7840\uff0c\u5bf9\u4e8e\u6ca1\u6709\u4f7f\u7528DHCP\u7684\u670d\u52a1\u5668\u4e2a\u522b\u673a\u5668\u53ef\u4ee5\u91c7\u7528\u9759\u6001\u6dfb\u52a0ARP access-list\u5b9e\u73b0\u3002DAI\u914d\u7f6e\u9488\u5bf9VLAN\uff0c\u5bf9\u4e8e\u540c\u4e00VLAN\u5185\u7684\u63a5\u53e3\u53ef\u4ee5\u5f00\u542fDAI\u4e5f\u53ef\u4ee5\u5173\u95ed\u3002\u901a\u8fc7DAI\u53ef\u4ee5\u63a7\u5236\u67d0\u4e2a\u7aef\u53e3\u7684ARP\u8bf7\u6c42\u62a5\u6587\u6570\u91cf\u3002\u901a\u8fc7\u8fd9\u4e9b\u6280\u672f\u53ef\u4ee5\u9632\u8303\u201c\u4e2d\u95f4\u4eba\u201d\u653b\u51fb\u3002<\/p>\n
3.3\u914d\u7f6e\u793a\u4f8b<\/p>\n
IOS \u5168\u5c40\u547d\u4ee4\uff1a<\/p>\n
ip dhcp snooping vlan 100,200<\/p>\n
no ip dhcp snooping information option<\/p>\n
ip dhcp snooping<\/p>\n
ip arp inspection vlan 100,200 \/* \u5b9a\u4e49\u5bf9\u54ea\u4e9b VLAN \u8fdb\u884c ARP \u62a5\u6587\u68c0\u6d4b<\/p>\n
ip arp inspection log-buffer entries 1024<\/p>\n
ip arp inspection log-buffer logs 1024 interval 10<\/p>\n
IOS \u63a5\u53e3\u547d\u4ee4\uff1a<\/p>\n
ip dhcp snooping trust<\/p>\n
ip arp inspection trust \/* \u5b9a\u4e49\u54ea\u4e9b\u63a5\u53e3\u662f\u4fe1\u4efb\u63a5\u53e3\uff0c\u901a\u5e38\u662f\u7f51\u7edc\u8bbe\u5907\u63a5\u53e3\uff0c TRUNK \u63a5\u53e3\u7b49<\/p>\n
ip arp inspection limit rate 15 (pps) \/* \u5b9a\u4e49\u63a5\u53e3\u6bcf\u79d2 ARP \u62a5\u6587\u6570\u91cf<\/p>\n
\u5bf9\u4e8e\u6ca1\u6709\u4f7f\u7528 DHCP \u8bbe\u5907\u53ef\u4ee5\u91c7\u7528\u4e0b\u9762\u529e\u6cd5\uff1a<\/p>\n
arp access-list static-arp<\/p>\n
permit ip host 10.66.227.5 mac host 0009.6b88.d387<\/p>\n
ip arp inspection filter static-arp vlan 201<\/p>\n
3.3\u914d\u7f6eDAI\u540e\u7684\u6548\u679c\uff1a<\/p>\n
\u2022 \u5728\u914d\u7f6e DAI\u6280\u672f\u7684\u63a5\u53e3\u4e0a\uff0c\u7528\u6237\u7aef\u4e0d\u80fd\u91c7\u7528\u6307\u5b9a\u5730\u5740\u5730\u5740\u5c06\u63a5\u5165\u7f51\u7edc\u3002<\/p>\n
\u2022 \u7531\u4e8e DAI\u68c0\u67e5 DHCP snooping\u7ed1\u5b9a\u8868\u4e2d\u7684IP\u548cMAC\u5bf9\u5e94\u5173\u7cfb\uff0c\u65e0\u6cd5\u5b9e\u65bd\u4e2d\u95f4\u4eba\u653b\u51fb\uff0c\u653b\u51fb\u5de5\u5177\u5931\u6548\u3002\u4e0b\u8868\u4e3a\u5b9e\u65bd\u4e2d\u95f4\u4eba\u653b\u51fb\u662f\u4ea4\u6362\u673a\u7684\u8b66\u544a\uff1a<\/p>\n
3w0d: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa5\/16, vlan 1.([000b.db1d.6ccd\/192.168.1.200\/0000.0000.0000\/192.168.1.2<\/p>\n
\u2022 \u7531\u4e8e\u5bf9 ARP\u8bf7\u6c42\u62a5\u6587\u505a\u4e86\u901f\u5ea6\u9650\u5236\uff0c\u5ba2\u6237\u7aef\u65e0\u6cd5\u8fdb\u884c\u8ba4\u4e3a\u6216\u8005\u75c5\u6bd2\u8fdb\u884c\u7684IP\u626b\u63cf\u3001\u63a2\u6d4b\u7b49\u884c\u4e3a\uff0c\u5982\u679c\u53d1\u751f\u8fd9\u4e9b\u884c\u4e3a\uff0c\u4ea4\u6362\u673a\u9a6c\u4e0a\u62a5\u8b66\u6216\u76f4\u63a5\u5207\u65ad\u626b\u63cf\u673a\u5668\u3002\u5982\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n
3w0d: %SW_DAI-4-PACKET_RATE_EXCEEDED: 16 packets received in 184 milliseconds on Fa5\/30. ******\u62a5\u8b66<\/p>\n
3w0d: %PM-4-ERR_DISABLE: arp-inspection error detected on Fa5\/30, putting Fa5\/ 30 in err-disable state ******\u5207\u65ad\u7aef\u53e3<\/p>\n
I49-4500-1#…..sh int f.5\/30<\/p>\n
FastEthernet5\/30 is down, line protocol is down (err-disabled)<\/p>\n
Hardware is Fast Ethernet Port , address is 0002.b90e .3f 4d (bia 0002.b90e .3f 4d)<\/p>\n
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,<\/p>\n
reliability 255\/255, txload 1\/255, rxload 1\/255<\/p>\n
I49-4500-1#……<\/p>\n
\u2022 \u7528\u6237\u83b7\u53d6 IP\u5730\u5740\u540e\uff0c\u7528\u6237\u4e0d\u80fd\u4fee\u6539IP\u6216MAC\uff0c\u5982\u679c\u7528\u6237\u540c\u65f6\u4fee\u6539IP\u548cMAC\u5fc5\u987b\u662f\u7f51\u7edc\u5185\u90e8\u5408\u6cd5\u7684IP\u548cMAC\u624d\u53ef\uff0c\u5bf9\u4e8e\u8fd9\u79cd\u4fee\u6539\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u8bb2\u5230\u7684 IP Source Guard\u6280\u672f\u6765\u9632\u8303\u3002\u4e0b\u8868\u4e3a\u624b\u52a8\u6307\u5b9aIP\u7684\u62a5\u8b66\uff1a<\/p>\n
3w0d: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa5\/30, vlan 1.([000d.6078.2d95\/192.168.1.100\/0000.0000.0000\/192.168.1.100\/01:52:28 UTC Fri Dec 29 2000 ]) DAI\u4e0d\u662f\u6240\u6709\u7684\u5e73\u53f0\u90fd\u652f\u6301\u7684\uff0cDAI\u57283550\u4ee5\u4e0a\u7684\u5e73\u53f0\u4e0a\u624d\u652f\u6301\uff0c\u800cIP Source Guard\u57284500\u4ee5\u4e0a\u7684\u5e73\u53f0\u4e0a\u624d\u652f\u6301\uff0c\u800c\u4e142950\u4e0b\u9762\u4e0d\u652f\u6301DHCP Snooping Binding\u6570\u636e\u5e93\u4fdd\u5b58\u5230TFTP\u670d\u52a1\u5668\u4e0a\u53bb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u5f53\u7136\uff0c\u5728\u5168\u90e8\u662fCisco\u4ea4\u6362\u7f51\u7edc\u91cc\uff0c\u53ef\u4ee5\u901a\u8fc7\u5e2e\u5b9a\u6bcf\u53f0\u8bbe\u5907\u7684ip\u548cmac\u5730\u5740\u53ef\u4ee5\u89e3\u51b3\u3002\u4f46\u662f\u8fd9\u6837\u505a\u6bd4\u8f83\u9ebb\u70e6\uff0c\u53ef\u4ee5\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[115],"_links":{"self":[{"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/posts\/475"}],"collection":[{"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/comments?post=475"}],"version-history":[{"count":1,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/posts\/475\/revisions"}],"predecessor-version":[{"id":476,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/posts\/475\/revisions\/476"}],"wp:attachment":[{"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/media?parent=475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/categories?post=475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecjtu.com\/keith\/wp-json\/wp\/v2\/tags?post=475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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\n\u7f51\u7edc\u7231\u597d\u8005
\nhttp:\/\/blog.sina.com.cn\/u\/1236537130<\/a><\/p>\n