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| VLAN Commands
C
36
HAPTER
Configuring IEEE 802.1Q Tunneling
switchport
dot1q-tunnel mode
R
C
ELATED
OMMANDS
show dot1q-tunnel
(1120)
show interfaces switchport (966)
This command configures an interface as a QinQ tunnel port. Use the no
form to disable QinQ on the interface.
S
YNTAX
switchport dot1q-tunnel mode {access | uplink}
no switchport dot1q-tunnel mode
access – Sets the port as an 802.1Q tunnel access port.
uplink – Sets the port as an 802.1Q tunnel uplink port.
D
S
EFAULT
ETTING
Disabled
C
M
OMMAND
ODE
Interface Configuration (Ethernet, Port Channel)
C
U
OMMAND
SAGE
QinQ tunneling must be enabled on the switch using the
◆
system-tunnel-control
mode interface command can take effect.
When a tunnel uplink port receives a packet from a customer, the
◆
customer tag (regardless of whether there are one or more tag layers)
is retained in the inner tag, and the service provider's tag added to the
outer tag.
When a tunnel uplink port receives a packet from the service provider,
◆
the outer service provider's tag is stripped off, and the packet passed
on to the VLAN indicated by the inner tag. If no inner tag is found, the
packet is passed onto the native VLAN defined for the uplink port.
E
XAMPLE
Console(config)#interface ethernet 1/1
Console(config-if)#switchport dot1q-tunnel mode access
Console(config-if)#
R
C
ELATED
OMMANDS
show dot1q-tunnel
(1120)
show interfaces switchport (966)
– 1116 –
command before the switchport dot1q-tunnel
dot1q-tunnel
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