{"id":365,"date":"2025-06-14T17:41:00","date_gmt":"2025-06-14T08:41:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=365"},"modified":"2025-10-23T09:57:25","modified_gmt":"2025-10-23T00:57:25","slug":"l2%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3%ef%bc%88%e3%82%b9%e3%83%97%e3%83%bc%e3%83%95%e3%82%a3%e3%83%b3%e3%82%b0%e5%af%be%e7%ad%96-ip%e3%83%bbarp%e7%b3%bb%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=365","title":{"rendered":"L2\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff08\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u5bfe\u7b56\/IP\u30fbARP\u7cfb\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9<\/span><\/strong>\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u300c\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306e\u306a\u308a\u3059\u307e\u3057\u300d\u3092\u9632\u3050\u305f\u3081\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3067\u3059\u3002<br>\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001\u300c\u305d\u306e\u30dd\u30fc\u30c8\u304b\u3089\u6d41\u308c\u3066\u304f\u308bIP\u30a2\u30c9\u30ec\u30b9\u304c\u6b63\u3057\u3044\u5229\u7528\u8005\u306e\u3082\u306e\u304b\u3069\u3046\u304b\u300d\u3092\u30b9\u30a4\u30c3\u30c1\u304c\u78ba\u8a8d\u3057\u3001\u4e0d\u6b63\u306a\u5834\u5408\u306f\u901a\u4fe1\u3092\u906e\u65ad\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u6a5f\u80fd\u306f\u3001\u7279\u306b <strong><span class=\"swl-marker mark_yellow\">DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0<\/span><\/strong> \u3068\u9023\u643a\u3057\u3066\u52d5\u4f5c\u3059\u308b\u70b9\u304c\u7279\u5fb4\u3067\u3059\u3002\u3064\u307e\u308a\u3001DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3067\u4f5c\u3089\u308c\u305f\u300c\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u300d\u304c\u524d\u63d0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u4ed5\u7d44\u307f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u60c5\u5831\u3092\u5229\u7528\u3057\u3066\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span class=\"swl-marker mark_yellow\"><strong>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/strong><br><\/span>DHCP\u306b\u3088\u3063\u3066\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u300cMAC\u30a2\u30c9\u30ec\u30b9\u30fbIP\u30a2\u30c9\u30ec\u30b9\u30fbVLAN\u30fb\u30dd\u30fc\u30c8\u756a\u53f7\u300d\u306e\u5bfe\u5fdc\u8868<\/li>\n\n\n\n<li><span class=\"swl-marker mark_yellow\"><strong>\u624b\u52d5\u3067\u8a2d\u5b9a\u3055\u308c\u305f\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/strong><br><\/span>\u7ba1\u7406\u8005\u304c\u9759\u7684\u306b\u5b9a\u7fa9\u3057\u305f\u5bfe\u5fdc\u8868<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30a4\u30c3\u30c1\u306f\u3001\u53d7\u4fe1\u3057\u305f\u30d5\u30ec\u30fc\u30e0\u306e <strong><span class=\"swl-marker mark_yellow\">\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u30fbMAC\u30a2\u30c9\u30ec\u30b9\u30fb\u30dd\u30fc\u30c8\u756a\u53f7<\/span><\/strong> \u3092\u30c6\u30fc\u30d6\u30eb\u3068\u7167\u5408\u3057\u307e\u3059\u3002\u4e00\u81f4\u3059\u308c\u3070\u6b63\u898f\u306e\u7aef\u672b\u3068\u3057\u3066\u901a\u4fe1\u3092\u8a31\u53ef\u3057\u3001\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u4e0d\u6b63\u306a\u901a\u4fe1\u3068\u3057\u3066\u7834\u68c4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u304c\u6709\u52b9\u5316\u3055\u308c\u305f\u30dd\u30fc\u30c8\u3067\u306f <strong><span class=\"swl-marker mark_yellow\">\u30b9\u30a4\u30c3\u30c1\u304c\u81ea\u52d5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u30ea\u30b9\u30c8\uff08PACL\uff09\u3092\u751f\u6210\u3057\u3066\u9069\u7528\u3059\u308b<\/span><\/strong> \u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u7ba1\u7406\u8005\u304c\u624b\u52d5\u3067ACL\u3092\u7528\u610f\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5229\u7528\u6761\u4ef6\u3068\u5236\u7d04<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u524d\u63d0\u6761\u4ef6<\/strong><br>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u304c\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u3002\u3053\u308c\u304c\u306a\u3051\u308c\u3070IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f\u5229\u7528\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n\n\n\n<li><strong>\u9069\u7528\u53ef\u80fd\u306a\u30dd\u30fc\u30c8<\/strong><br>IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f\u300cUntrusted\u30dd\u30fc\u30c8\u300d\u306b\u5bfe\u3057\u3066\u8a2d\u5b9a\u3057\u307e\u3059\u3002<br>\u9069\u7528\u3067\u304d\u308b\u306e\u306f <strong>\u30a2\u30af\u30bb\u30b9\u30dd\u30fc\u30c8<\/strong> \u307e\u305f\u306f <strong>\u30c8\u30e9\u30f3\u30af\u30dd\u30fc\u30c8<\/strong> \u3068\u3044\u3063\u305fL2\u30dd\u30fc\u30c8\u306b\u9650\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3064\u307e\u308a\u3001DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u306b\u3088\u3063\u3066\u300c\u3069\u306eIP\u304c\u3069\u306e\u30dd\u30fc\u30c8\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u300d\u3092\u8a18\u9332\u3057\u3001\u305d\u306e\u60c5\u5831\u3092\u5143\u306b\u300cIP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u300d\u3067\u4e0d\u6b63\u306a\u9001\u4fe1\u5143\u3092\u9632\u3050\u3001\u3068\u3044\u3046\u4e8c\u6bb5\u69cb\u3048\u306e\u4ed5\u7d44\u307f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\u3068\u3057\u3066\u306f\u3001\u300cDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3068IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f\u30bb\u30c3\u30c8\u3067\u4f7f\u3046\u300d\u300cUntrusted\u30dd\u30fc\u30c8\u3067\u52d5\u4f5c\u300d\u300cL2\u30dd\u30fc\u30c8\u306b\u306e\u307f\u8a2d\u5b9a\u53ef\u80fd\u300d\u3068\u3044\u3046\u70b9\u3092\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306e\u8a2d\u5b9a\u624b\u9806<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3092\u4f7f\u3046\u305f\u3081\u306b\u306f\u3001\u524d\u63d0\u6761\u4ef6\u3068\u3057\u3066 <strong><span class=\"swl-marker mark_yellow\">DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0<\/span><\/strong> \u304c\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u8a2d\u5b9a\u3068\u5bfe\u8c61VLAN\u306e\u6307\u5b9a\u3092\u884c\u3044\u3001\u305d\u306e\u5f8c\u306b\u30dd\u30fc\u30c8\u3054\u3068\u306bIP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u306e\u524d\u63d0\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u306f\u30b9\u30a4\u30c3\u30c1\u5168\u4f53\u3067DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3092\u6709\u52b9\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip dhcp snooping<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b21\u306b\u3001\u3069\u306eVLAN\u3067DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3092\u6709\u52b9\u306b\u3059\u308b\u304b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip dhcp snooping vlan vlan-id &#91; smartlog ]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001DHCP\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u542b\u307e\u308c\u308b <strong><span class=\"swl-marker mark_yellow\">Option 82<\/span><\/strong>\uff08\u30ea\u30ec\u30fc\u60c5\u5831\uff09\u306e\u633f\u5165\u3068\u524a\u9664\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip dhcp snooping information option<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306e\u6709\u52b9\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f\u3001\u5bfe\u8c61\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u8a2d\u5b9a\u30e2\u30fc\u30c9\u3067\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u3092\u9078\u3093\u3067\u6709\u52b9\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2460 IP\u30a2\u30c9\u30ec\u30b9\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306e\u307f\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002<br>\u53d7\u4fe1\u30d5\u30ec\u30fc\u30e0\u306e\u9001\u4fe1\u5143IP\u304c\u3001DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\uff08\u307e\u305f\u306f\u9759\u7684\u306b\u5b9a\u7fa9\u3057\u305f\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\uff09\u3068\u4e00\u81f4\u3057\u305f\u5834\u5408\u306b\u901a\u4fe1\u304c\u8a31\u53ef\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# ip verify source<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u2461 IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u4e21\u65b9\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306b\u52a0\u3048\u3066\u3001\u9001\u4fe1\u5143MAC\u30a2\u30c9\u30ec\u30b9\u3082\u7167\u5408\u3057\u307e\u3059\u3002\u4e21\u65b9\u304c\u4e00\u81f4\u3057\u305f\u5834\u5408\u306e\u307f\u901a\u4fe1\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002<br>\u3053\u306e\u8a2d\u5b9a\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u3001DHCP\u30b5\u30fc\u30d0\u5074\u304c <strong>Option 82<\/strong> \u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config-if)# ip verify source port-security<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9759\u7684\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306e\u8ffd\u52a0\uff08\u4efb\u610f\u8a2d\u5b9a\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u5b9a\u306e\u7aef\u672b\u306b\u5bfe\u3057\u3066\u3001\u624b\u52d5\u3067\u300cIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5bfe\u5fdc\u300d\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br>\u3053\u308c\u306b\u3088\u308aDHCP\u3092\u4f7f\u308f\u306a\u3044\u7aef\u672b\u3067\u3082IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3092\u9069\u7528\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip source binding mac-address vlan vlan-id ip-address interface interface-id<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u4f8b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f VLAN100\u30fb200\u30fb300 \u3067DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3092\u6709\u52b9\u306b\u3057\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>FastEthernet 0\/1\uff5e0\/24<\/strong> \u306b\u63a5\u7d9a\u3055\u308c\u305f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30dd\u30fc\u30c8\u3067IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3092\u6709\u52b9\u5316\uff08\u9001\u4fe1\u5143IP\u306e\u307f\u691c\u8a3c\uff09<\/li>\n\n\n\n<li><strong>GigabitEthernet 0\/1<\/strong> \u3092DHCP\u30b5\u30fc\u30d0\u7528\u306eTrusted\u30dd\u30fc\u30c8\u306b\u8a2d\u5b9a<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SW1(config)# ip dhcp snooping\nSW1(config)# ip dhcp snooping vlan 100,200,300\nSW1(config)# ip dhcp snooping information option\n\nSW1(config)# interface range fastethernet 0\/1 - 24\nSW1(config-if)# switchport mode access\nSW1(config-if)# switchport access vlan 100\nSW1(config-if)# spanning-tree portfast\nSW1(config-if)# ip verify source\n\nSW1(config)# interface gigabitethernet 0\/1\nSW1(config-if)# switchport mode trunk\nSW1(config-if)# switchport trunk allowed vlan 100,200,300\nSW1(config-if)# ip dhcp snooping trust<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u78ba\u8a8d\u30b3\u30de\u30f3\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a2d\u5b9a\u5f8c\u306f\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>show ip verify source<\/code><br>\u2192 IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306e\u6709\u52b9\u5316\u72b6\u6cc1\u3001\u5229\u7528\u4e2d\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li><code>show ip source binding<\/code><br>\u2192 VLAN\u3084\u30dd\u30fc\u30c8\u3054\u3068\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u30fbIP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u306f <strong>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u5fc5\u9808<\/strong>\u3002<br>\u30fb\u9069\u7528\u5bfe\u8c61\u306f <strong>Untrusted\u30dd\u30fc\u30c8<\/strong>\u3002<br>\u30fb\u30a2\u30af\u30bb\u30b9\u30dd\u30fc\u30c8\u3084\u30c8\u30e9\u30f3\u30af\u30dd\u30fc\u30c8\uff08L2\u30dd\u30fc\u30c8\uff09\u306b\u306e\u307f\u8a2d\u5b9a\u53ef\u80fd\u3002<br>\u30fb\u300cIP\u306e\u307f\u7167\u5408\u300d\u304b\u300cIP\uff0bMAC\u7167\u5408\u300d\u306e2\u7a2e\u985e\u304c\u3042\u308b\u3002<br><br>\u3053\u3053\u306f\u51fa\u984c\u983b\u5ea6\u304c\u9ad8\u3044\u305f\u3081\u3001\u7279\u306b\u300c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3069\u306e\u30dd\u30fc\u30c8\u304cUntrusted\u304b\u300d\u300c\u3069\u306e\u60c5\u5831\u3068\u7167\u5408\u3059\u308b\u306e\u304b\u300d\u3092\u660e\u78ba\u306b\u899a\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0<\/span><\/strong>\u3068\u306f\u3001LAN\u5185\u3067\u4f7f\u308f\u308c\u308b ARP\uff08Address Resolution Protocol\uff09 \u3092\u60aa\u7528\u3057\u305f\u653b\u6483\u306e\u3072\u3068\u3064\u3067\u3059\u3002\u672c\u6765\u3001ARP\u306f\u300cIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u5bfe\u5fdc\u3059\u308bMAC\u30a2\u30c9\u30ec\u30b9\u3092\u554f\u3044\u5408\u308f\u305b\u308b\u4ed5\u7d44\u307f\u300d\u3067\u3001\u6b63\u5e38\u306a\u901a\u4fe1\u306e\u305f\u3081\u306b\u6b20\u304b\u305b\u306a\u3044\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3057\u304b\u3057\u3053\u306e\u4ed5\u7d44\u307f\u306b\u306f\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u304c\u306a\u304f\u3001\u8ab0\u304c\u9001\u3063\u305fARP\u5fdc\u7b54\u3067\u3042\u3063\u3066\u3082\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u305d\u306e\u307e\u307e\u53d7\u3051\u5165\u308c\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u5f31\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u306f\u3053\u306e\u5f31\u70b9\u3092\u7a81\u304d\u3001\u507d\u306eARP\u5fdc\u7b54\u3092\u9001\u308a\u3064\u3051\u308b\u3053\u3068\u3067\u300c\u81ea\u5206\u3092\u6b63\u898f\u306e\u901a\u4fe1\u76f8\u624b\u306b\u898b\u305b\u304b\u3051\u308b\u300d\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u304cARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d50\u679c\u3068\u3057\u3066\u3001\u88ab\u5bb3\u8005\u306f\u672c\u6765\u30eb\u30fc\u30bf\u3084\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306b\u9001\u308b\u306f\u305a\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u653b\u6483\u8005\u3078\u8ee2\u9001\u3057\u3066\u3057\u307e\u3044\u3001\u653b\u6483\u8005\u306b\u3088\u308b\u76d7\u8074\u3084\u6539\u3056\u3093\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u653b\u6483\u306e\u6d41\u308c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306e\u5178\u578b\u7684\u306a\u6d41\u308c\u3092\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6b63\u898f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306eARP\u8981\u6c42<\/strong><br>\u4f8b\u3048\u3070\u30db\u30b9\u30c8A\u304c\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306b\u901a\u4fe1\u3057\u305f\u3044\u3068\u304d\u3001\u300c\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u5bfe\u5fdc\u3059\u308bMAC\u30a2\u30c9\u30ec\u30b9\u306f\uff1f\u300d\u3068ARP\u8981\u6c42\u3092\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u6b63\u898f\u30eb\u30fc\u30bf\u304b\u3089\u306eARP\u5fdc\u7b54<\/strong><br>\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306e\u30eb\u30fc\u30bf\u306f\u81ea\u8eab\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u542b\u3080\u6b63\u3057\u3044ARP\u5fdc\u7b54\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u653b\u6483\u8005\u304b\u3089\u306e\u507dARP\u5fdc\u7b54<\/strong><br>\u653b\u6483\u8005\u306f\u3001\u30eb\u30fc\u30bf\u306b\u6210\u308a\u3059\u307e\u3057\u305fARP\u5fdc\u7b54\u3092\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3067\u9001\u4fe1\u3057\u307e\u3059\u3002\u3057\u304b\u3082\u3001\u4f55\u5ea6\u3082\u7e70\u308a\u8fd4\u3057\u9001\u308b\u305f\u3081\u6b63\u898f\u5fdc\u7b54\u3092\u4e0a\u66f8\u304d\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u88ab\u5bb3\u8005\u304c\u4e0d\u6b63\u306a\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong><br>\u30db\u30b9\u30c8A\u306fARP\u30c6\u30fc\u30d6\u30eb\u306b\u653b\u6483\u8005\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u767b\u9332\u3057\u3066\u3057\u307e\u3044\u3001\u672c\u6765\u30eb\u30fc\u30bf\u306b\u9001\u308b\u306f\u305a\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u653b\u6483\u8005\u306b\u9001\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u653b\u6483\u8005\u306f\u300c\u901a\u4fe1\u7d4c\u8def\u306e\u4e2d\u9593\u300d\u306b\u5165\u308a\u8fbc\u307f\u3001\u76d7\u8074\u3084\u6539\u3056\u3093\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u624b\u6cd5\u306f <strong><span class=\"swl-marker mark_yellow\">Man-in-the-Middle\u653b\u6483\uff08\u4e2d\u9593\u8005\u653b\u6483\uff09<\/span><\/strong> \u306e\u4ee3\u8868\u4f8b\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u653b\u6483\u306e\u5fdc\u7528\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u653b\u6483\u8005\u306f\u5358\u306b\u30db\u30b9\u30c8A\u3060\u3051\u3092\u9a19\u3059\u306e\u3067\u306f\u306a\u304f\u3001\u30eb\u30fc\u30bf\u5074\uff08\u30eb\u30fc\u30bfB\uff09\u306b\u5bfe\u3057\u3066\u3082\u507dARP\u5fdc\u7b54\u3092\u9001\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u3053\u306e\u5834\u5408\u3001\u30db\u30b9\u30c8A\u3068\u30eb\u30fc\u30bfB\u306e\u4e21\u65b9\u304c\u300c\u901a\u4fe1\u76f8\u624b\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306f\u653b\u6483\u8005\u306e\u3082\u306e\u300d\u3068\u4fe1\u3058\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u653b\u6483\u8005\u306f\u5b8c\u5168\u306b\u901a\u4fe1\u306e\u4e2d\u7d99\u70b9\u3068\u306a\u308a\u3001\u53cc\u65b9\u5411\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u76d7\u8074\u3057\u305f\u308a\u6539\u3056\u3093\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u306a\u305c\u4e0d\u6b63ARP\u5fdc\u7b54\u304c\u53d7\u7406\u3055\u308c\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cARP\u30d1\u30b1\u30c3\u30c8\u306e\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u304c\u3001\u5b9f\u969b\u306eIP\u30d8\u30c3\u30c0\u3084Ethernet\u30d8\u30c3\u30c0\u3068\u98df\u3044\u9055\u3063\u3066\u3044\u305f\u3089\u5f3e\u304b\u308c\u308b\u306e\u3067\u306f\uff1f\u300d\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001ARP\u306b\u306f\u53b3\u683c\u306a\u691c\u8a3c\u6a5f\u69cb\u304c\u306a\u304f\u3001\u307e\u305f <strong>Proxy ARP<\/strong> \u306e\u3088\u3046\u306a\u6b63\u898f\u6a5f\u80fd\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u305f\u3081\u306b\u3001\u3053\u3046\u3057\u305f\u4e0d\u6b63\u306aARP\u5fdc\u7b54\u3082\u53d7\u7406\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u304c\u3001ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u304c\u6210\u7acb\u3057\u3066\u3057\u307e\u3046\u5927\u304d\u306a\u7406\u7531\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u30fbARP\u306fLAN\u901a\u4fe1\u306b\u4e0d\u53ef\u6b20\u3060\u304c\u3001\u8a8d\u8a3c\u3084\u691c\u8a3c\u306e\u4ed5\u7d44\u307f\u304c\u306a\u3044\u305f\u3081\u8106\u5f31\u3002<br>\u30fb\u653b\u6483\u8005\u304c\u507d\u306eARP\u5fdc\u7b54\u3092\u9001\u308b\u3068\u3001\u88ab\u5bb3\u8005\u306eARP\u30c6\u30fc\u30d6\u30eb\u304c\u66f8\u304d\u63db\u3048\u3089\u308c\u308b\u3002<br>\u30fb\u7d50\u679c\u3068\u3057\u3066\u76d7\u8074\u30fb\u6539\u3056\u3093\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u4ee3\u8868\u7684\u306a <strong>\u4e2d\u9593\u8005\u653b\u6483<\/strong> \u306e\u4e00\u7a2e\u3068\u306a\u308b\u3002<br><br>\u3053\u3053\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u95a2\u9023\u306e\u51fa\u984c\u7bc4\u56f2\u3068\u3057\u3066\u91cd\u8981\u306a\u90e8\u5206\u306a\u306e\u3067\u3001\u5fc5\u305a\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DAI\uff08Dynamic ARP Inspection\uff09\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">DAI\uff08\u30c0\u30a4\u30ca\u30df\u30c3\u30afARP\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3\uff09<\/span><\/strong>\u306f\u3001LAN\u4e0a\u3067\u3084\u308a\u53d6\u308a\u3055\u308c\u308b ARP\u30d1\u30b1\u30c3\u30c8\u3092\u691c\u67fb \u3057\u3001\u4e0d\u6b63\u306aARP\u5fdc\u7b54\u3092\u9632\u3050\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3067\u3059\u3002ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306e\u3088\u3046\u306b\u653b\u6483\u8005\u304c\u507d\u306eARP\u5fdc\u7b54\u3092\u9001\u3063\u3066\u304d\u3066\u3082\u3001\u30b9\u30a4\u30c3\u30c1\u304c\u305d\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u53d7\u3051\u53d6\u308a\u3001\u5185\u5bb9\u3092\u691c\u8a3c\u3057\u3066\u7834\u68c4\u3059\u308b\u3053\u3068\u3067\u88ab\u5bb3\u3092\u9632\u304e\u307e\u3059\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u6b63\u898f\u306eARP\u5fdc\u7b54\u3060\u3051\u304c\u8ee2\u9001\u3055\u308c\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u8aa4\u3063\u305fARP\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3092\u9632\u6b62\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u306f\u3001ARP\u30d1\u30b1\u30c3\u30c8\u306b\u542b\u307e\u308c\u308b <strong><span class=\"swl-marker mark_yellow\">IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5bfe\u5fdc\u95a2\u4fc2<\/span><\/strong> \u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u3067\u6b63\u5f53\u6027\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3053\u306e\u969b\u306b\u5229\u7528\u3055\u308c\u308b\u306e\u304c<strong><span class=\"swl-marker mark_yellow\">\u300c\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u300d<\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DAI\u3067\u4f7f\u7528\u3055\u308c\u308b\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u3067\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u306b\u5fdc\u3058\u3066\u6b21\u306e\u3044\u305a\u308c\u304b\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883<\/th><th>\u5fc5\u8981\u306a\u4ed5\u7d44\u307f<\/th><th>\u5229\u7528\u3055\u308c\u308b\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/th><\/tr><\/thead><tbody><tr><td>DHCP\u74b0\u5883<\/td><td>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u304c\u5fc5\u8981<\/td><td>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/td><\/tr><tr><td>\u975eDHCP\u74b0\u5883<\/td><td>\u4e0d\u8981<\/td><td>\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u306b\u8a2d\u5b9a\u3055\u308c\u305fIP\u3068MAC\u306e\u5bfe\u5fdc\u8868<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">DHCP\u74b0\u5883\u3067\u306fDAI\u306fDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3068\u9023\u643a\u3059\u308b\u304c\u3001\u975eDHCP\u74b0\u5883\u3067\u306f\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u8a2d\u5b9a\u3067\u5358\u72ec\u904b\u7528\u53ef\u80fd<\/span><\/strong> \u3068\u3044\u3046\u70b9\u3067\u3059\u3002DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3084IP\u30bd\u30fc\u30b9\u30ac\u30fc\u30c9\u3068\u9055\u3044\u3001DAI\u306f\u5fc5\u305a\u3057\u3082DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3092\u524d\u63d0\u3068\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DAI\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u533a\u5206<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u3092\u6709\u52b9\u5316\u3059\u308b\u3068\u3001\u3059\u3079\u3066\u306e\u30dd\u30fc\u30c8\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u300c\u4fe1\u983c\u3067\u304d\u306a\u3044\uff08Untrusted\uff09\u300d\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u7279\u5225\u306a\u8a2d\u5b9a\u3092\u3057\u306a\u3051\u308c\u3070ARP\u691c\u67fb\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/th><th>\u8a2d\u5b9a\u30b3\u30de\u30f3\u30c9<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u4fe1\u983c\u3067\u304d\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08Trusted\uff09<\/td><td><code>ip arp inspection trust<\/code><\/td><td>\u3053\u306e\u30dd\u30fc\u30c8\u3067\u306fDAI\u306b\u3088\u308b\u691c\u67fb\u3092\u884c\u308f\u306a\u3044\uff08\u4f8b\uff1aDHCP\u30b5\u30fc\u30d0\u3084\u30eb\u30fc\u30bf\u304c\u63a5\u7d9a\u3055\u308c\u308b\u30dd\u30fc\u30c8\uff09<\/td><\/tr><tr><td>\u4fe1\u983c\u3067\u304d\u306a\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08Untrusted\uff09<\/td><td>\u8a2d\u5b9a\u4e0d\u8981\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/td><td>\u3053\u306e\u30dd\u30fc\u30c8\u3067\u53d7\u4fe1\u3057\u305fARP\u30d1\u30b1\u30c3\u30c8\u306fDAI\u306b\u3088\u308b\u691c\u67fb\u5bfe\u8c61\u3068\u306a\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300cDAI\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067Untrusted\u300d\u300cTrusted\u306b\u3059\u308b\u5834\u5408\u3060\u3051\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u300d\u3068\u3044\u3046\u70b9\u304c\u72d9\u308f\u308c\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DAI\u306b\u3088\u308b\u691c\u67fb\u306e\u6d41\u308c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u304c\u6709\u52b9\u306a\u30b9\u30a4\u30c3\u30c1\u4e0a\u3067\u306eARP\u691c\u67fb\u306e\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4fe1\u983c\u3067\u304d\u306a\u3044\u30dd\u30fc\u30c8\u304b\u3089\u9001\u3089\u308c\u305f\u3059\u3079\u3066\u306eARP\u8981\u6c42\u304a\u3088\u3073ARP\u5fdc\u7b54\u3092\u30b9\u30a4\u30c3\u30c1\u304c\u53d7\u4fe1\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u30b9\u30a4\u30c3\u30c1\u306f\u305d\u306eARP\u30d1\u30b1\u30c3\u30c8\u306b\u542b\u307e\u308c\u308b IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u7d44\u307f\u5408\u308f\u305b \u3092\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3068\u7167\u5408\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u5b58\u5728\u3057\u306a\u3044\u7d44\u307f\u5408\u308f\u305b\u3067\u3042\u308c\u3070\u3001\u305d\u306eARP\u30d1\u30b1\u30c3\u30c8\u3092\u7834\u68c4\u3059\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3064\u307e\u308a\u3001DAI\u306f\u300cARP\u5fdc\u7b54\u304c\u6b63\u3057\u3044\u9001\u4fe1\u5143\u304b\u3089\u306e\u3082\u306e\u304b\u3069\u3046\u304b\u300d\u3092\u9010\u4e00\u78ba\u8a8d\u3057\u3001\u4e0d\u6b63\u306a\u5fdc\u7b54\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u6d41\u3055\u306a\u3044\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u30fbDAI\u306f <strong>ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u5bfe\u7b56<\/strong> \u306b\u4f7f\u3046\u3002<br>\u30fbDHCP\u74b0\u5883\u3067\u306f <strong>DHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb<\/strong> \u3092\u5229\u7528\u3002<br>\u30fb\u975eDHCP\u74b0\u5883\u3067\u306f <strong>\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u306bIP\u3068MAC\u3092\u7d10\u3065\u3051\u3066\u5b9a\u7fa9<\/strong> \u3059\u308c\u3070\u52d5\u4f5c\u3059\u308b\u3002<br>\u30fb\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5168\u30dd\u30fc\u30c8\u304cUntrusted\u3001Trusted\u306b\u3059\u308b\u306b\u306f <code>ip arp inspection trust<\/code> \u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br><br>\u7279\u306b\u300cDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u5fc5\u9808\u304b\u3069\u3046\u304b\u300d\u300cTrusted\/Untrusted\u306e\u6271\u3044\u300d\u306f\u51fa\u984c\u983b\u5ea6\u304c\u9ad8\u3044\u305f\u3081\u78ba\u5b9f\u306b\u899a\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Dynamic ARP Inspection\uff08DAI\uff09\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u306f\u3001DHCP\u74b0\u5883\u3068\u975eDHCP\u74b0\u5883\u3067\u8a2d\u5b9a\u65b9\u6cd5\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u306e\u5834\u5408\u3082VLAN\u5358\u4f4d\u3067\u6709\u52b9\u5316\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4fe1\u983c\u3067\u304d\u308b\u30dd\u30fc\u30c8\uff08Trusted\uff09\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3059\u3079\u3066\u306e\u30dd\u30fc\u30c8\u304c\u4fe1\u983c\u3067\u304d\u306a\u3044\u30dd\u30fc\u30c8\uff08Untrusted\uff09\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DHCP\u74b0\u5883\u3067\u306eDAI\u8a2d\u5b9a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u8a2d\u5b9a\u30b3\u30de\u30f3\u30c9<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305aDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u3092\u6709\u52b9\u5316\u3057\u3001\u5bfe\u8c61\u306eVLAN\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001DAI\u3092\u6709\u52b9\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip dhcp snooping\n(config)# ip dhcp snooping vlan vlan-id\n(config)# ip arp inspection vlan vlan-id<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30b9\u30de\u30fc\u30c8\u30ed\u30ae\u30f3\u30b0\u3092\u6709\u52b9\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection smartlog<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">DHCP\u30b5\u30fc\u30d0\u3084\u4e0a\u4f4d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u308b\u30dd\u30fc\u30c8\u306f\u4fe1\u983c\u3067\u304d\u308b\u30dd\u30fc\u30c8\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# interface interface-id\n(config-if)# ip arp inspection trust<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u4f8b\uff08DHCP\u74b0\u5883\uff09<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">VLAN100\u3067DAI\u3092\u6709\u52b9\u5316\u3057\u3001FastEthernet0\/1\uff5e0\/24\u3092\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u7528\u306eUntrusted\u30dd\u30fc\u30c8\u3001GigabitEthernet0\/1\u3092\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u63a5\u7d9a\u306eTrusted\u30dd\u30fc\u30c8\u306b\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Catalyst(config)# ip dhcp snooping\nCatalyst(config)# ip dhcp snooping vlan 100\nCatalyst(config)# ip arp inspection vlan 100\n\nCatalyst(config)# interface range fastethernet 0\/1 - 24\nCatalyst(config-if)# switchport mode access\nCatalyst(config-if)# switchport access vlan 100\nCatalyst(config-if)# spanning-tree portfast\n\nCatalyst(config)# interface gigabitethernet 0\/1\nCatalyst(config-if)# switchport mode trunk\nCatalyst(config-if)# ip dhcp snooping trust\nCatalyst(config-if)# ip arp inspection trust<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u975eDHCP\u74b0\u5883\u3067\u306eDAI\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DHCP\u3092\u4f7f\u308f\u306a\u3044\u74b0\u5883\u3067\u306f\u3001ARP ACL\u3092\u4f5c\u6210\u3057\u3066\u6b63\u898f\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5bfe\u5fdc\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u3092VLAN\u306b\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">ARP ACL\u306e\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# arp access-list acl-name\n(config-arp-acl)# permit ip host sender-ip mac host sender-mac &#91; log ]<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">VLAN\u3078\u306e\u9069\u7528<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection filter acl-name vlan vlan-range &#91; static ]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">static\u3092\u6307\u5b9a\u3059\u308b\u3068ACL\u306b\u306a\u3044ARP\u30d1\u30b1\u30c3\u30c8\u306f\u3059\u3079\u3066\u7834\u68c4\u3055\u308c\u307e\u3059\u3002\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306fDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Trusted\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u8a2d\u5b9a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# interface interface-id\n(config-if)# ip arp inspection trust<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8a2d\u5b9a\u4f8b\uff08\u975eDHCP\u74b0\u5883\uff09<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30db\u30b9\u30c8\uff08IP\u30a2\u30c9\u30ec\u30b9192.168.0.10\u3001MAC\u30a2\u30c9\u30ec\u30b91111.2222.aaaa\uff09\u3092\u8a31\u53ef\u3057\u3001\u305d\u306e\u8a2d\u5b9a\u3092VLAN100\u306b\u9069\u7528\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Catalyst(config)# ip arp inspection vlan 100\n\nCatalyst(config)# arp access-list HOST01\nCatalyst(config-arp-acl)# permit ip host 192.168.0.10 mac host 1111.2222.aaaa\n\nCatalyst(config)# ip arp inspection filter HOST01 vlan 100\n\nCatalyst(config)# interface gigabitethernet 0\/1\nCatalyst(config-if)# switchport mode trunk\nCatalyst(config-if)# ip arp inspection trust<\/code><\/pre>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">DHCP\u74b0\u5883\u3067\u306fDHCP\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u5229\u7528\u3057\u3001\u975eDHCP\u74b0\u5883\u3067\u306fARP ACL\u3092\u5229\u7528\u3059\u308b\u3002DAI\u3092\u6709\u52b9\u5316\u3059\u308b\u3068\u3059\u3079\u3066\u306e\u30dd\u30fc\u30c8\u304cUntrusted\u3068\u306a\u308a\u3001Trusted\u306b\u3059\u308b\u306b\u306f\u660e\u793a\u7684\u306b<code>ip arp inspection trust<\/code>\u3092\u8a2d\u5b9a\u3059\u308b\u3002VLAN\u5358\u4f4d\u3067\u6709\u52b9\u5316\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308b\u3053\u3068\u3092\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DAI\uff08Dynamic ARP Inspection\uff09\u306e\u4efb\u610f\u8a2d\u5b9a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u306fARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u5bfe\u7b56\u3068\u3057\u3066\u975e\u5e38\u306b\u6709\u52b9\u3067\u3059\u304c\u3001\u3055\u3089\u306b\u904b\u7528\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u4efb\u610f\u8a2d\u5b9a\u3092\u52a0\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u4ee3\u8868\u7684\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7740\u4fe1ARP\u30d1\u30b1\u30c3\u30c8\u306e\u30ec\u30fc\u30c8\u5236\u9650<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30a4\u30c3\u30c1\u306eCPU\u306fARP\u30d1\u30b1\u30c3\u30c8\u3092\u691c\u67fb\u3059\u308b\u305f\u3081\u3001\u653b\u6483\u8005\u304c\u5927\u91cf\u306eARP\u3092\u9001\u308a\u3064\u3051\u308bDoS\u653b\u6483\u3092\u4ed5\u639b\u3051\u3066\u304d\u305f\u5834\u5408\u306b\u5099\u3048\u3001<strong>Untrusted\u30dd\u30fc\u30c8\u306b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30ec\u30fc\u30c8\u5236\u9650<\/strong>\u304c\u304b\u304b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\uff1a15 pps\uff081\u79d2\u9593\u306b15\u30d1\u30b1\u30c3\u30c8\u307e\u3067\uff09<\/li>\n\n\n\n<li>\u30d0\u30fc\u30b9\u30c8\u9593\u9694\uff1a1\u79d2<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5236\u9650\u3092\u5909\u66f4\u3059\u308b\u30b3\u30de\u30f3\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection limit &#91; rate pps &#91; burst interval seconds ] | none ]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>rate none<\/code> \u3092\u6307\u5b9a\u3059\u308b\u3068\u5236\u9650\u3092\u306a\u304f\u305b\u307e\u3059\u3002\u5236\u9650\u3092\u8d85\u3048\u308b\u3068\u30dd\u30fc\u30c8\u306f <strong>errdisable\u30b9\u30c6\u30fc\u30c8<\/strong> \u306b\u79fb\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u306e\u969b\u3001\u81ea\u52d5\u5fa9\u65e7\u3092\u6709\u52b9\u306b\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<br>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5fa9\u65e7\u6642\u9593\uff08interval\uff09\u306f300\u79d2\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# errdisable detect cause arp-inspection\n(config)# errdisable recovery cause arp-inspection\n(config)# errdisable recovery interval \u79d2\u6570<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">ARP\u30d1\u30b1\u30c3\u30c8\u306e\u59a5\u5f53\u6027\u30c1\u30a7\u30c3\u30af<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u306fARP\u30d1\u30b1\u30c3\u30c8\u3092\u53d7\u4fe1\u3057\u3066\u6b63\u5f53\u6027\u3092\u5224\u65ad\u3057\u307e\u3059\u304c\u3001\u3055\u3089\u306b\u8a73\u7d30\u306a\u691c\u8a3c\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection validate &#91; src-mac ] &#91; dst-mac ] &#91; ip ]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>src-mac<\/code>\uff1aEthernet\u30d8\u30c3\u30c0\u306e\u9001\u4fe1\u5143MAC\u3068ARP\u672c\u6587\u5185\u306e\u9001\u4fe1\u5143MAC\u304c\u4e00\u81f4\u3059\u308b\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li><code>dst-mac<\/code>\uff1aEthernet\u30d8\u30c3\u30c0\u306e\u5b9b\u5148MAC\u3068ARP\u672c\u6587\u5185\u306e\u5b9b\u5148MAC\u304c\u4e00\u81f4\u3059\u308b\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li><code>ip<\/code>\uff1aARP\u672c\u6587\u306b\u7121\u52b9\u306aIP\u30a2\u30c9\u30ec\u30b9\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3092\u6709\u52b9\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u507d\u9020ARP\u3092\u3088\u308a\u53b3\u5bc6\u306b\u9632\u3052\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ed\u30b0\u30d0\u30c3\u30d5\u30a1\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DAI\u306f\u4e0d\u6b63ARP\u30d1\u30b1\u30c3\u30c8\u3092\u7834\u68c4\u3059\u308b\u3068\u3001\u305d\u306e\u60c5\u5831\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<br>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u4ee5\u4e0b\u306e\u5236\u9650\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u6570\uff1a32<\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u30e1\u30c3\u30bb\u30fc\u30b8\u6570\uff1a1\u79d2\u3042\u305f\u308a5\u4ef6\u307e\u3067<\/li>\n\n\n\n<li>\u30ed\u30ae\u30f3\u30b0\u9593\u9694\uff1a1\u79d2<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8abf\u6574\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection log-buffer &#91; entries \u6570 | logs \u6570 interval \u79d2 ]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001\u3069\u306e\u7a2e\u985e\u306eARP\u30d1\u30b1\u30c3\u30c8\u3092\u30ed\u30b0\u306b\u6b8b\u3059\u304b\u3092VLAN\u5358\u4f4d\u3067\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(config)# ip arp inspection vlan vlan-id logging &#91; acl-match { matchlog | none } | dhcp-bindings { all | none | permit } ]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>acl-match matchlog<\/code>\uff1aARP ACL\u3067\u8a31\u53ef\u30fb\u62d2\u5426\u3092\u30ed\u30b0\u306b\u8a18\u9332<\/li>\n\n\n\n<li><code>acl-match none<\/code>\uff1aACL\u306b\u4e00\u81f4\u3057\u305f\u30d1\u30b1\u30c3\u30c8\u3092\u8a18\u9332\u3057\u306a\u3044<\/li>\n\n\n\n<li><code>dhcp-bindings all<\/code>\uff1aDHCP\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306b\u4e00\u81f4\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u3059\u3079\u3066\u8a18\u9332<\/li>\n\n\n\n<li><code>dhcp-bindings none<\/code>\uff1aDHCP\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306b\u4e00\u81f4\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u306f\u8a18\u9332\u3057\u306a\u3044<\/li>\n\n\n\n<li><code>dhcp-bindings permit<\/code>\uff1a\u8a31\u53ef\u3055\u308c\u305f\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u30d1\u30b1\u30c3\u30c8\u306e\u307f\u8a18\u9332<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">DAI\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u307e\u3068\u3081<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6a5f\u80fd<\/th><th>\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a<\/th><\/tr><\/thead><tbody><tr><td>DAI<\/td><td>\u7121\u52b9\uff08\u5168VLAN\u3067\u30c7\u30a3\u30bb\u30fc\u30d6\u30eb\uff09<\/td><\/tr><tr><td>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4fe1\u983c\u72b6\u614b<\/td><td>\u5168\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306fUntrusted<\/td><\/tr><tr><td>\u30ec\u30fc\u30c8\u5236\u9650<\/td><td>Untrusted\u30dd\u30fc\u30c8\u306f15pps\u3001Trusted\u30dd\u30fc\u30c8\u306f\u5236\u9650\u306a\u3057\u3001\u30d0\u30fc\u30b9\u30c8\u9593\u96941\u79d2<\/td><\/tr><tr><td>ARP ACL<\/td><td>\u5b9a\u7fa9\u306a\u3057<\/td><\/tr><tr><td>\u59a5\u5f53\u6027\u691c\u67fb<\/td><td>\u5b9f\u884c\u3055\u308c\u306a\u3044<\/td><\/tr><tr><td>\u30ed\u30b0\u30d0\u30c3\u30d5\u30a1<\/td><td>\u30a8\u30f3\u30c8\u30ea\u657032\u3001\u30b7\u30b9\u30c6\u30e0\u30e1\u30c3\u30bb\u30fc\u30b8\u306f1\u79d2\u3042\u305f\u308a5\u4ef6\u307e\u3067\u3001\u30ed\u30ae\u30f3\u30b0\u9593\u96941\u79d2<\/td><\/tr><tr><td>VLAN\u5358\u4f4d\u306e\u30ed\u30ae\u30f3\u30b0<\/td><td>\u3059\u3079\u3066\u306e\u62d2\u5426\/\u5ec3\u68c4ARP\u30d1\u30b1\u30c3\u30c8\u304c\u8a18\u9332\u3055\u308c\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u30fbUntrusted\u30dd\u30fc\u30c8\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067<strong>15pps\u5236\u9650<\/strong>\u304c\u3042\u308b\u3002<br>\u30fb\u8d85\u904e\u3059\u308b\u3068\u30dd\u30fc\u30c8\u304cerrdisable\u3068\u306a\u308a\u3001\u30ea\u30ab\u30d0\u30ea\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u81ea\u52d5\u5fa9\u65e7\u53ef\u80fd\u3002<br>\u30fb<code>ip arp inspection validate<\/code> \u3067 <strong>src-mac \/ dst-mac \/ ip<\/strong> 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