D-Link Xstack DES-3528 Series Reference Manual page 96

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
QinQ State
Inner TPID
Unit
From Port / To Port
Role
Missdrop
Outer TPID
Use Inner Priority
Figure 4-26 Q-in-Q Settings window
Description
Click the radio button to enable or disable the Q-in-Q Global Settings.
This is used to decide if the ingress packet is c-tagged. Inner tag TPID is per system
configurable.
Select a unit to be configured.
A consecutive group of ports that are part of the VLAN configuration starting with the
selected port.
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.
Use the drop-down menu to enable or disable missdrop. If missdrop is enabled, the packet
that does not match any VLAN translation rule on the UNI port will be dropped. If disabled,
then the packet will be assigned the S-VLAN tag based on the VLAN classification rule of
the received port.
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.
This is the priority given to the inner tag that is copied to the outer tag if this setting is
enabled.
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