Advanced Configuration Options
48
Model 2160 Series Getting Started Guide
4 • Web configuration
Port-Based QinQ
Click on
VLAN
under
Advanced
on the main menu to reach the VLAN advanced configuration page. Then,
select the radio button for
Port-Based QinQ
to display the configuration options.
Figure 20. Port-Based QinQ VLAN page
•
PVID (Port VID):
An untagged member of the default VLAN. Select from 1 to 4094.
•
TPID (Tag Protocol Identifier):
Enter 33024 for IEEE802.1Q .
•
Link Type:
Select from
Access
or
Trunk
.
Access
means the port can receive or send
untagged
packets.
Trunk
means that the port can receive or send
tagged
packets.
A VLAN tag uses the tag protocol identifier (TPID) field to identify the protocol type of the tag. The value of
this field, as defined in IEEE 802.1Q, is 0x8100 (33024).
Figure 21. VLAN Tag structure of an Ethernet frame
On devices of different vendors, the TPID of the outer VLAN tag of QinQ frames may have different default
values. You can set or modify this TPID value, so that the QinQ frames, when arriving at the public network,
carries the TPID value of a specific vendor to allow interoperation with devices of that vendor.
The TPID in an Ethernet frame has the same position with the protocol type field in a frame without a VLAN
tag. To avoid chaotic packet forwarding and receiving, you cannot set the TPID value to any of the values in
table 8
on page 49.
