D-Link DES-1210-10/ME [41/129] Configuration qinq qinq settings

4 Configuration DES-1210 Metro Ethernet Managed Switch User Manual

Click Apply to implement changes made.

Configuration > QinQ > QinQ Settings

The QinQ Settings page allows user to enable or disable the Q-in-Q function. Q-in-Q is designed for service

providers to carry traffic from multiple users across a network.

Q-in-Q is used to maintain customer specific VLAN and Layer 2 protocol configurations even when the same

VLAN ID is being used by different customers. This is achieved by inserting SPVLAN tags into the

customer’s frames when they enter the service provider’s network, and then removing the tags when the

frames leave the network.

Customers of a service provider may have different or specific requirements regarding their internal VLAN

IDs and the number of VLANs that can be supported. Therefore customers in the same service provider

network may have VLAN ranges that overlap, which might cause traffic to become mixed up. So assigning a

unique range of VLAN IDs to each customer might cause restrictions on some of their configurations

requiring intense processing of VLAN mapping tables which may exceed the VLAN mapping limit. Q-in-Q

uses a single service provider VLAN (SPVLAN) for customers who have multiple VLANs. Customer’s VLAN

IDs are segregated within the service provider’s network even when they use the same customer specific

VLAN ID. Q-in-Q expands the VLAN space available while preserving the customer’s original tagged packets

and adding SPVLAN tags to each new frame. Select Enabled or Disabled then click Apply to enable or

disable the Q-in-Q Global Settings.

Figure 4.53 - Configuration > QinQ > QinQ Settings

From Port / To Port: A consecutive group of ports that are part of the VLAN configuration starting with the

selected port.

Role: The user can choose between UNI or NNI role.

UNI – To select a user-network interface which specifies that communication between the specified

user and a specified network will occur.

NNI – To select a network-to-network interface specifies that communication between two specified

networks will occur.

Outer TPID (hex: 0x1-0xffff): The Outer TPID is used for learning and switching packets. The Outer TPID

constructs and inserts the outer tag into the packet based on the VLAN ID and Inner Priority.

Trust CVID: Specify the Trust CVID is enabled or disabled on the ports.

VLAN Translation: Specify the VLAN Translation is enabled or disabled on the ports.

Click Apply to implement changes made.

Configuration > QinQ > VLAN Translation CVID Entry Settings

The VLAN Translation translates the VLAN ID carried in the data packets it receives from private networks

into those used in the Service Providers network.