Configuring VLANs 595
Configuring Double VLAN Tagging
Beginning in Privileged EXEC mode, use the following commands to 
configure an interface to send and accept frames with double VLAN tagging.
Command Purpose
configure Enter global configuration mode.
interface 
interface
Enter interface configuration mode for the specified 
interface. The 
interface
 variable includes the interface type 
and number, for example tengigabitethernet 1/0/3.
You can also specify a range of interfaces with the interface 
range command, for example, interface range 
tengigabitethernet 1/0/8-12 configures interfaces 8, 9, 10, 
11, and 12.
mode dvlan-tunnel Enable Double VLAN Tunneling on the specified 
interface.
exit Exit to global configuration mode
dvlan-tunnel ethertype 
{802.1Q | vman | 
custom <
0-65535
>} 
[primary-tpid]
Configure the EtherType to use for interfaces with double 
VLAN tunneling enabled.
• 802.1Q — Configures the EtherType as 0x8100.
• vman — Configures the EtherType as 0x88A8.
• custom — Custom configures the EtherType for the 
DVLAN tunnel. The value must be 0-65535.
• primary-tpid — Configure the primary (outer) TPID. If 
this parameter is not present, the inner TPID is 
configured.
CTRL + Z Exit to Privileged EXEC mode.
show dvlan-tunnel Display all interfaces enabled for Double VLAN Tunneling
show dvlan-tunnel 
interface {
interface 
| 
all}
Display detailed information about Double VLAN 
Tunneling for the specified interface or all interfaces.