Figure 18-2 Separating Client - Radwin 5000 HPMP User Manual

VLAN Untagging
Figure 18‐2: Separating client data streams using double tagging
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.
RADWIN 5000 HPMP User Manual Release 3.5.70 18‐3