Chapter 22. Double VLANs and Private VLAN Groups | 339
22
22. Double VLANs and Private VLAN
Groups
This chapter includes the following examples:
• Double VLANs
• Private VLAN Groups on page 343
Double VLANs
This section describes how to enable the double DVLAN feature. Double VLANs pass traffic
from one customer domain to another through the metro core. Custom VLAN IDs are
preserved and a provider service VLAN ID is added to the traffic so the traffic can pass the
metro core in a simple and cost-effective manner. You can use VLANs to specify customer
ports and a service provider port. In this example, the switches have the same configuration.
Internet
Port 1/0/48Port 1/0/48
Layer 2 switch
Layer 2 switch
Port 1/0/24 Port 1/0/24
Customer
domain
Customer
domain
Figure 1. Double VLANS
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