D-Link DGS-1520 Emulator - Page 103
ARP Spoofing Prevention Commands
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DGS-1520 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide 6. ARP Spoofing Prevention Commands 6-1 ip arp spoofing-prevention This command is used to configure an ARP Spoofing Prevention (ASP) entry of the gateway used for preventing ARP poisoning attacks. Use the no form of this command to delete an ARP spoofing prevention entry. ip arp spoofing-prevention GATEWAY-IP GATEWAY-MAC interface INTERFACE-ID [, | -] no ip arp spoofing-prevention GATEWAY-IP [interface INTERFACE-ID [, | -]] Parameters GATEWAY-IP GATEWAY-MAC interface INTERFACE-ID , - Specifies the IP address of the gateway. Specifies the MAC address of the gateway. The MAC address setting will replace the last configuration for the same gateway IP address. Specifies the interface that will be activated or removed from active interface list (in the no form of this command). An ARP entry won't be checked, if the receiving port is not included in the specified interface list. (Optional) Specifies a series of interfaces or separates a range of interfaces from a previous range. No space is allowed before or after the comma. (Optional) Specifies a range of interfaces. No space is allowed before or after the hyphen. Default By default, no entries exist. Command Mode Global Configuration Mode. Command Default Level Level: 12. Usage Guideline This command is only available for physical port and port-channel interface configuration. This command is used to configure the ARP spoofing prevention (ASP) entry to prevent spoofing of the MAC address of the protected gateway. When an entry is created, ARP packets whose sender IP address matches the gateway IP address, of an entry, but its sender MAC address field does not match the gateway MAC address, of the entry, will be dropped by the system. The ASP will bypass the ARP packets whose sender IP address does not match the configured gateway IP address. If an ARP address matches a configured gateway's IP address, MAC address, and port list, the ARP address will bypass the Dynamic ARP Inspection (DAI) check no matter the receiving port is ARP 'trusted' or 'untrusted'. Example This example shows how to configure an ARP spoofing prevention entry with an IP address of 10.254.254.251 and MAC address of 00-00-00-11-11-11 and activate the entry on port 10. Switch#configure terminal Switch(config)#ip arp spoofing-prevention 10.254.254.251 00-00-00-11-11-11 interface eth1/0/10 Switch(config)# 99
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1,177
-
1,178
-
1,179
-
1,180
-
1,181
-
1,182
-
1,183
-
1,184
-
1,185
-
1,186
-
1,187
-
1,188
-
1,189
-
1,190
-
1,191
-
1,192
-
1,193
-
1,194
-
1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246
-
1,247
-
1,248
-
1,249
-
1,250
-
1,251
-
1,252
-
1,253
-
1,254
-
1,255
-
1,256
-
1,257
-
1,258
-
1,259
-
1,260
-
1,261
-
1,262
-
1,263
-
1,264
-
1,265
-
1,266
-
1,267
-
1,268
-
1,269
-
1,270
-
1,271
-
1,272
-
1,273
-
1,274
-
1,275
-
1,276
-
1,277
-
1,278
-
1,279
-
1,280
-
1,281
-
1,282
-
1,283
-
1,284
-
1,285
-
1,286
-
1,287
-
1,288
-
1,289
-
1,290
-
1,291
-
1,292
-
1,293
-
1,294
-
1,295
-
1,296
-
1,297
-
1,298
-
1,299
-
1,300
-
1,301
-
1,302
-
1,303
-
1,304
-
1,305
-
1,306
-
1,307
-
1,308
-
1,309
-
1,310
-
1,311