System information

VLAN Settings
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same internal VLAN IDs. This is accomplished by inserting Service Provider VLAN
(SPVLAN) tags into the customer’s frames when they enter the service provider’s
network, and then stripping the tags when the frames leave the network. QinQ
tunneling expands VLAN space by using this VLAN-in-VLAN hierarchy, preserving
the customer’s original tagged packets, and adding SPVLAN tags to each frame
(also called double tagging). Ports on the switch can be set to support QinQ when
providing a direct link to a service provider's network.
Field Attributes
• Port/Trunk – The port-number of the port or the ID of a trunk. This cannot be
changed.
• VLAN Aware Enabled – VLAN aware ports will strip the VLAN tag from received
frames and insert the tag in transmitted frames (except PVID). VLAN unaware
ports will not strip the tag from received frames or insert the tag in transmitted
frames. For QinQ operation, a customer port should be set to VLAN unaware and
a provider port (trunk port) should be set to VLAN aware.
• QinQ – A QinQ enabled port will accept packets up to 1526 bytes in length, which
means double tag header frames can be accepted. QinQ should be enabled for
provider ports but not for customer ports.
Note:
QinQ “customer” ports are those ports that are connected to normal VLAN aware
switches in the customer’s network. QinQ “network” ports are those which are
connected to the service provider's network. To tunnel packets through a service
provider’s metro network, QinQ needs to be enabled on the network port.
• Packet Type – Sets the interface to accept all frame types, or only tagged frames.
If the Packet Type is set to “All,” the port can accept incoming tagged and untagged
packets. Untagged packets will be associated with the VLAN identified by the
PVID. Tagged packets will be dropped unless the port is a member of the VLAN
identified by the VLAN tag in the packet.
If the Packet Type is set to “Tagged Only,” the port will drop untagged packets and
will only receive tagged packets. Tagged packets will be dropped unless the port
is a member of the VLAN identified by the VLAN tag in the packet. (Default: All)
• PVID – The port VLAN ID (PVID) assigned to untagged frames received on the
interface. Specify the VLAN ID that will be assigned to untagged frames received
on the port. You cannot remove a port from VLAN 1 unless its PVID has been
changed to something other than 1. You can only choose “None” for the VLAN ID
when the packet type is set to “Tagged Only.” Outgoing packets are tagged unless
the packet’s VLAN ID is the same as the PVID. When the PVID is set to “None,” all
outgoing packets are tagged. (Default: 1)
Note:
If you select “Tagged Only” mode for a port, it is recommended to set the PVID to
“None” as the standard configuration.