D-Link DGS-1520 Emulator - Page 217
ip dhcp relay information trusted
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DGS-1520 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide When this command is enabled, IP DHCP relay information is trusted for all interfaces. When this command is disabled, the trust state is determined by the ip dhcp relay information trusted command in the Interface Configuration Mode. Use the show ip dhcp relay information trusted-sources command to see the settings. Example This example shows how to enable the DHCP relay agent to trust IP DHCP relay information for all interfaces. Switch#configure terminal Switch(config)#ip dhcp relay information trust-all Switch(config)# 20-15 ip dhcp relay information trusted This command is used to enable the DHCP relay agent to trust the relay information for the interface. Use the no form of this command to disable the trusting of relay information for the interface. ip dhcp relay information trusted no ip dhcp relay information trusted Parameters None. Default By default, information is not trusted. Command Mode Interface Configuration Mode. Command Default Level Level: 12. Usage Guideline When IP DHCP relay information trust is enabled on an interface, the arriving packets with a GIADDR of 0 (this relay agent is the first relay of this DHCP request packet) but with relay agent information option present will be accepted. If it is not trusted, these packets will be dropped. When the ip dhcp relay information trust-all command is enabled, IP DHCP relay information is trusted for all interfaces. When the ip dhcp relay information trust-all command is disabled, the trust state is determined by this command. Use the show ip dhcp relay information trusted-sources command to see the settings. 213
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1,208
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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