Users Guide

forward the frame traffic across its network. At the egress edge, the provider removes the S-Tag, so that the
customer receives the frame in its original condition, as shown in the following illustration.
Figure 121. VLAN Stacking in a Service Provider Network
Important Points to Remember
• Interfaces that are members of the Default VLAN and are configured as VLAN-Stack access or trunk
ports do not switch untagged traffic. To switch traffic, add these interfaces to a non-default VLAN-
stack-enabled VLAN.
• Dell Networking cautions against using the same MAC address on different customer VLANs, on the
same VLAN-stack VLAN.
Service Provider Bridging 1014