Reference Guide
VLAN Stacking | 1507
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VLAN Stacking
Overview
With the VLAN-Stacking feature (also called Stackable VLANs and QinQ), you can 
“stack” VLANs into one tunnel and switch them through the network transparently. 
This feature is supported by FTOS on all Dell Force10 platforms as indicated by the 
characters that appear under each of the command headings: 
e E-Series, c 
C-Series, 
s S-Series,  , or  .
Commands
The commands included are:
• dei enable
• dei honor
• dei mark
• member
• show interface dei-honor
• show interface dei-mark
• stack-unit stack-group
• vlan-stack access
• vlan-stack compatible
• vlan-stack dot1p-mapping
• vlan-stack protocol-type
• vlan-stack trunk
For information on basic VLAN commands, refer to Virtual LAN (VLAN) 
Commands in the chapter Layer 2.
Important Points to Remember
• If Spanning Tree Protocol (STP) is not enabled across the Stackable VLAN 
network, STP BPDUs from the customer’s networks are tunneled across the 
Stackable VLAN network.










