QinQ - Maipu Configurations

In last post, As we discussed about QinQ. Let’see in action, The same thing.Here we will see selective QinQ. Since this most used QinQ style.

For Basic no need to give any Vlan mapping. It will work by default with port pvid.Just you need to enable vlan dot1q tunnel under port. Then it will tag incoming vlan with port vlan and while going out of network. It will remove the Service provider vlan tag. 

Here we can see selective QinQ....

PE1 and PE2 are the operator’s network devices; Customer A, Customer B and Customer C are the user network devices.

Networking requirement: VLAN 10 packets of Customer A and VLAN 10 packets of Customer C are inter-communicated via VLAN 100 of the operator network. VLAN 20 packets of Customer B and VLAN 20 packets of Customer C are inter-communicated via VLAN 200 of the operator network.

Topology                          

PE1 configuration:

Command	Description
PE1(config-port-0/1)#port mode hybrid	Set the port as Hybrid port
PE1(config-port-0/1)#port hybrid untagged vlan 100	Add the port to VLAN 100
PE1(config-port-0/1)#vlan dot1q-tunnel enable	Enable the basic vlan dot1q-tunnel function on the port
PE1(config-port-0/1)#vlan dot1q-tunnel 10 100	The port configures flexible items and encapsulates outer Tag 100 for received VLAN 10 packets.
PE1(config-port-0/1)#vlan dot1q-tunnel drop	The port configuration only supports flexible items.
PE1(config-port-0/2)#port mode hybrid	Set the port as Hybrid port
PE1(config-port-0/2)#port hybrid untagged vlan 200	Add the port to VLAN 200
PE1(config-port-0/2)#vlan dot1q-tunnel enable	Enable the basic vlan dot1q-tunnel function on the port
PE1(config-port-0/2)#vlan dot1q-tunnel 20 200	The port configures flexible items and encapsulates outer Tag 200 for received VLAN 20 packets.
PE1(config-port-0/2)#vlan dot1q-tunnel drop	The port configuration only supports flexible items.
PE1(config-port-0/3)#port mode trunk	Set the port as Trunk port
PE1(config-port-0/3)#port trunk allowed vlan 100	Set port 0/3 to allow VLAN 100 to pass
PE1(config-port-0/3)#port trunk allowed vlan 200	Set port 0/3 to allow VLAN 200 to pass

PE2 configuration:

Command	Description
PE2(config-port-0/2)#port mode hybrid	Set the port as Hybrid port
PE2(config-port-0/2)#port hybrid untagged vlan 100	Add the port to VLAN 100
PE2(config-port-0/2)#port hybrid untagged vlan 200	Add the port to VLAN 200
PE2(config-port-0/2)#vlan dot1q-tunnel enable	Enable basic vlan dot1q-tunnel function on the port
PE2(config-port-0/2)#vlan dot1q-tunnel 10 100	The port configures flexible items and encapsulates outer Tag 100 for received VLAN 10 packets.
PE2(config-port-0/2)#vlan dot1q-tunnel 20 200	The port configures flexible items and encapsulates outer Tag 200 for received VLAN 20 packets.
PE2(config-port-0/2)#vlan dot1q-tunnel drop	The port configuration only supports flexible items.
PE2(config-port-0/3)#port mode trunk	Set the port as Trunk port
PE2(config-port-0/3)#port trunk allowed vlan 100	Set port 0/3 to allow VLAN 100 to pass
PE2(config-port-0/3)#port trunk allowed vlan 200	Set port 0/3 to allow VLAN 200 to pass

Note -

The user must ensure that the network devices between PE1 and PE2 can permit vlan dot1q tunnel packets to pass via configuration.

Monitoring Commands

Command	Description
show vlan dot1q-tunnel	View the information about the flexible vlan dot1q-tunnel items
show vlan dot1q-tunnel mapping	View the information about the flexible vlan dot1q-tunnel mapping items
show frame-tag tpid	View all port TPID information

Monitoring Command Output - show outputs are for reference , not actual*

switch#show vlan dot1q-tunnel

Displayed result:

switch#show vlan dot1q-tunnel

-------------------- ------------VLAN DOT1Q-TUNNEL-----------------------

Port                     Inner VlanId             Outer VlanId            

-------------------- --------------------- ----------------------------------------------

port 0/1                 totals:2

                                  10                              100                     

                                  15                              150                     

port 0/2                 totals:1

                                  20                              200                     

Description and analysis:

Port: port name

Inner VlanId: The VLAN ID of the Tag packets received by the port, that is, the inner VLAN ID of the packets after encapsulation.

Outer VlanId: The outer VLAN ID encapsulated by the port, that is, the outer VLAN ID of the packets after encapsulation

The displayed result shows the flexible vlan dot1q-tunnel items configured on the port and the details.

switch#show vlan dot1q-tunnel mapping

Displayed result:

-------------------- -------VLAN DOT1Q-TUNNEL MAPPING--------------------

Port                     Former VlanId            Mapping VlanId           

-------------------- --------------------- ----------------------------------------------------

port 0/4                 totals:1

                                  40                                400                     

port 0/5                 totals:2

                                  40                                400                     

                                 50                                 500                     

port 0/6                totals:1

                                 40                                400 

Description and analysis:

Port: port name

Former VlanId: The VLAN ID of the Tag packets received by the port, that is, the VLAN ID of the Tag in the packet before replacing

Outer VlanId: The VLAN ID used by the port for replacing as per the flexible items, that is, the VLAN ID used to replace Tag

The displayed result shows the flexible vlan dot1q-tunnel mapping items configured on the port and the details.

Hope this configuration will help you for better understanding of QinQ functions.

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