Dell Force10 S55T FTOS Command Line Reference Guide for the S55 System FTOS 8. - Page 1055
VLAN Stacking, Overview, Commands, Important Points to Remember
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44 VLAN Stacking Overview With the VLAN-Stacking feature (also called Stackable VLANs and QinQ), available on all Dell Force10 platforms (C-Series c, E-Series e, and S-Series s) that are supported by this version of FTOS, you can "stack" VLANs into one tunnel and switch them through the network transparently. Commands The commands included are: • dei enable • dei honor • dei mark • member • show interface dei-honor • show interface dei-mark • vlan-stack access • vlan-stack compatible • vlan-stack dot1p-mapping • vlan-stack protocol-type • vlan-stack trunk For information on basic VLAN commands, see 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. • If STP is enabled across the Stackable VLAN network, STP BPDUs from the customer's networks are consumed and not tunneled across the Stackable VLAN network unless protocol tunneling is enabled. Note: For details on protocol tunneling on the E-Series, see Chapter 37, Service Provider Bridging. • Layer 3 protocols are not supported on a Stackable VLAN network. VLAN Stacking | 1055