VLAN Untagging Chapter 12RADWIN 5000 HPMP User Manual Release 3.2.00 12-3The outer tag (representing the Provider VLAN) comes first, followed by the inner tag. InQinQ 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’snetwork. The system adds a tag with a VLAN ID and EtherType = 0x9100 to allframes, 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 andEtherType = 0x9100 so the frame will have one tag• For a frame with a VLAN tag – the system will add a tag with VLAN ID andEtherType = 0x9100 so the frame will be double-taggedFor a frame with a VLAN tag and a provider tag – the system will add a tag with VLAN ID andEtherType = 0x9100 so the frame will be triple-tagged and so on.VLAN UntaggingVLAN Untagging means the removal of a VLAN or a Provider tag.Port FunctionalityVLAN functionality is supported at the MNG port of the HSU.The HSU MNG port can be configured to handle Ethernet frames at ingress direction(where frames enter the HSU) and at egress direction (where frame exit the HSU).
