Dell PowerConnect 8100 User's Configuration Guide - Page 560
Private VLANs, Primary VLAN, Isolated VLAN, Community VLAN, Promiscuous port, Host port
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Private VLANs Private VLANs partition a standard VLAN domain into two or more subdomains. Each subdomain is defined by a primary VLAN and a secondary VLAN. The primary VLAN ID is the same for all subdomains that belong to a particular private VLAN instance. The secondary VLAN ID differentiates the subdomains from each other and provides layer 2 isolation between ports on the same private VLAN. The following types of VLANs can be configured in a private VLAN: • Primary VLAN-Forwards the traffic from the promiscuous ports to isolated ports, community ports and other promiscuous ports in the same private VLAN. Only one primary VLAN can be configured per private VLAN. All ports within a private VLAN share the same primary VLAN. • Isolated VLAN-A secondary VLAN. It carries traffic from isolated ports to promiscuous ports. Only one isolated VLAN can be configured per private VLAN. • Community VLAN-A secondary VLAN. It forwards traffic between ports which belong to the same community and to the promiscuous ports. There can be multiple community VLANs per private VLAN. A port may be designated as one of the following types in a private VLAN: • Promiscuous port-A port associated with a primary VLAN that is able to communicate with all interfaces in the private VLAN, including other promiscuous ports, community ports and isolated ports. • Host port-A port associated with a secondary VLAN that can either communicate with the promiscuous ports in the VLAN and with other ports in the same community (if the secondary VLAN is a community VLAN) or can communicate only with the promiscuous ports (if the secondary VLAN is an isolated VLAN). Private VLANs may be configured across a stack and on physical and portchannel interfaces. Private VLAN Usage Scenarios Private VLANs are typically implemented in a DMZ for security reasons. Servers in a DMZ are generally not allowed to communicate with each other but they must communicate to a router, through which they are connected to the users. Such servers are connected to host ports, and the routers are 560 Configuring VLANs
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-
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