Omnitron Systems Technology 10/100M user manual Tagged Vlan

4.3.7Tagged VLAN

The 10/100M 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:

4.3.7.1Port 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.

4.3.7.2Port 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.

4.3.7.3Tagged 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.

4.3.7.4Ingress 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.

4.3.7.5Egress Policy

This section defines the egress policy.

Selecting the “untag” option defines how a tagged or untagged packet is processed. A tagged packet will have the top tag removed and an untagged packet will be passed unmodified.

Selecting the “tag” option will tag an untagged packet with the PVID and PRI of the ingress port or add a tag to an already tagged packet with the PVID and PRI of the ingress port.

Selecting the “pass” option, a packet tagged or untagged will be passed unchanged as it egresses out of the port.

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