Omnitron Systems Technology 2FXM2 user manual Tagged Vlan

4.3.8Tagged VLAN

The 2FXM2 supports the IEEE 802.1Q tag VLAN packet tagging and un-tagging and the 802.1p Quality of Service priority standards.

The following parameters are configured for each port:

4.3.8.1Port Priority (PRI)

This (IEEE 802.1p based) user-specified value of 0 through 7 can be assigned as a QoS priority level (0 being lowest and 7 being highest) to packets ingressing (entering) a port. If no value is specified by the user, a default priority value of “0” is assigned.

The PRI value is always assigned to all untagged packets. Tagged packets are assigned the PRI value when the “PVID” option is selected in the “Tagged Packet Use” section.

4.3.8.2Port VLAN ID (PVID)

This (IEEE 802.1Q based) user-specified value of 0 through 4094 can be assigned as a Port VLAN ID (PVID) to packets ingressing a port. If no value is specified by the user a default PVID value of “2” is assigned.

The PVID value is always assigned to untagged packets. Tagged packets are assigned the PVID value when the “PVID” option is selected in the “Tagged Packet Use” section.

4.3.8.3Tagged Packet Use

This section defines how tagged packets ingressing a port are processed.

Selecting the “PVID” option causes the PRI and PVID user-specified values to be used as the packet’s VLAN ID (VID) for processing of the packet.

Selecting the “TVID” (Tagged VLAN ID) option causes the packet’s original Tag VLAN ID (TVID) and priority level to be used as the packet’s VLAN ID (VID) for processing of the packet.

NOTE:Untagged packets are always assigned the port’s PRI and PVID values as their VID.

4.3.8.4Ingress Security

This section selects the ingress security level of a port. Selecting the “Low” option allows any packet to ingress a port.

Selecting the “High” option allows only packets that are assigned a VLAN ID (VID) value of which this port is a member (according to the Membership Table) to ingress a port.

4.3.8.5Port Type

This section defines the port type.

Selecting the “Tunnel” option, sets the egress mode to “Pass” for each VID assigned to the port in the membership table. The port is set to “Accept Tagged” frames.

Selecting the “Trunk” option, the port is set to a Egress Tag Mode of “Provider Tag”. Frames ingressing will have the “Provider Tag” removed.

Selecting the “Access” option, sets the egress mode to “Pass” for each VID assigned to the port in the membership table. The port is set to “Discard Tagged” frames.

4.3.8.6Global Settings

The 2FXM2 allows the setting of the customer facing port (C-TAG) and the network facing port (S-TAG). C-Tag is used by the port when Port Type is set to “Access” or “Tunnel”. The C-Tag defaults to 0x8100h. S-TAG is used by the port when Port Type is set to “Trunk”. The S-Tag defaults to 0x8100h. If the S-Tag is changed the port functions as an IEEE 802.1ad S-Tag port.

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