Radwin 5000 HPMP User Manual page 238

VLAN Untagging
The outer tag (representing the Provider VLAN) comes first, followed by the inner tag. In
QinQ the EtherType = 0x9100. VLAN tags may be stacked three or more deep.
When using this type of "Provider Tagging" you should keep the following in mind:
• Under Provider Tagging, the system double-tags egress frames towards the Provider's
network. The system adds a tag with a VLAN ID and EtherType = 0x9100 to all
frames, as configured by the service provider (Provider VLAN ID).
• The system always adds to each frame, tags with VLAN ID and EtherType = 0x9100.
Therefore,
• For a frame without a tag – the system will add a tag with VLAN ID and
EtherType = 0x9100 so the frame will have one tag
• For a frame with a VLAN tag – the system will add a tag with VLAN ID and
EtherType = 0x9100 so the frame will be double-tagged
For a frame with a VLAN tag and a provider tag – the system will add a tag with VLAN ID and
EtherType = 0x9100 so the frame will be triple-tagged and so on.
At the egress side, the HSU removes the QinQ tag with EtherType = 0x9100 no matter what
the value of its VLAN ID.
VLAN Untagging
VLAN Untagging means the removal of a VLAN or a Provider tag.
Port Functionality
In a RADWIN 5000 sector, all VLAN activity is configured and supported from the HSUs.
To this end, VLAN functionality is supported at the MNG port of the HSU.
The HSU MNG port can be configured to handle Ethernet frames at the ingress direction
(where frames enter the HSU) and at the egress direction (where frames exit the HSU).
RADWIN 5000 HPMP User Manual Release 3.3.30
Chapter 13
13-3