- 91 -
6.2.3 Dot1q Tunnel
802.1Q tunnel ports are used to maintain customer VLAN integrity across a service provider network. You can
configure a tunnel port on an edge switch in the service provider network and connect it to an 802.1Q trunk port on a
customer interface, creating an asymmetric link. A tunnel port belongs to a single VLAN that is dedicated to tunneling.
Use the following commands, beginning in config mode, to configure an interface as an IEEE 802.1q tunnel port:
Command Purpose
interface
ifname
Enter the interface name to access the interface configuration
mode.
switchport mode dot1q-tunnel
This command will put the interface into IEEE 802.1q dot1q-
tunnel access mode.
Use the
no
form of this command to reset to the default of
static-access mode.
switchport access vlan
vid
This command will assign a VLAN ID specific to the particular
customer.
Use the
no
form of this command to reset the access VLAN
to default VID 1.
End
Return to Enable mode.