D-Link DGS-1520 Emulator - Page 1179
DGS-1520 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide, IP-ACCESS-LIST-NAME, IPV6
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DGS-1520 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide ip verify unicast source [reachable-via any] [access-group IP-ACCESS-LIST-NAME] [ipv6-access-group IPV6-ACCESS-LIST-NAME] no ip verify unicast source [reachable-via] [access-group] [ipv6-access-group] Parameters reachable-via any access-group IP-ACCESSLIST-NAME ipv6-access-group IPV6ACCESS-LIST-NAME (Optional) Specifies how URPF verifies if the source address is present in the routing table of incoming packets (sometimes referred to as the loose mode). (Optional) Specifies the name of the IPv4 ACL to be checked. (Optional) Specifies the name of the IPV6 ACL to be checked. Default By default, URPF checking is not performed. By default, no IPv4/IPv6 access list is specified. Command Mode Interface Configuration Mode. Command Default Level Level: 12. Usage Guideline This command is only available for physical port interface configuration. Unicast RPF helps to mitigate problems caused by the introduction of malformed or forged IPv4/IPv6 source addresses into a network by discarding IPv4/IPv6 packets that lack a verifiable IPv4/IPv6 source address. When Unicast RPF is effectively enabled on an interface, the Switch examines all IPv4 and IPv6 packets received as input on that interface to make sure that the source address and source interface appear in the routing table and match the interface on which the packet was received. The reverse path checking will not be performed in the following situations: • The destination IPv4/IPv6 address is not a unicast address. • The source IP address is an IPv6 address and the address is a link-local address. • The received packet is a BOOTP/DHCP packet (the source IP is 0.0.0.0 and destination IP is 255.255.255.255). Example This example shows how to enable Unicast RPF checking on port 8. Switch#configure terminal Switch(config)#interface eth1/0/8 Switch(config-if)#ip verify unicast source Switch(config-if)# This example shows how to configure the Unicast RPF checking mode to any on port 1. Switch#configure terminal Switch(config)#interface eth1/0/1 Switch(config-if)#ip verify unicast source reachable-via any Switch(config-if)# 1175
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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