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DES-3200-10/18/28/28F Layer 2 Ethernet Managed Switch User Manual
Figure 3 - 10. 802.1Q Static VLAN window – VLAN Batch Settings tab
The following fields can be set in the VLAN Batch Settings tab:
Parameter Description
VID List (e.g.: 2-5)
Enter a VLAN ID List that can be added, deleted or configured.
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Enabling this function will allow the Switch to send out GVRP packets to outside sources,
notifying that they may join the existing VLAN.
Port List (e.g.: 1-5)
Allows an individual port list to be added or deleted as a member of the VLAN.
Tagged
Specifies the port as 802.1Q tagged. Checking the box will designate the port as Tagged.
Untagged
Specifies the port as 802.1Q untagged. Checking the box will designate the port as untagged.
Forbidden
Select this to specify the port as not being a member of the VLAN and that the port is
forbidden from becoming a member of the VLAN dynamically.
Click Apply to implement changes made.
Q-in-Q
This function allows the 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.
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