KTI Networks KGS-0841-W User Manual page 64

Keep Tag Per port setting
Enable - The VLAN tag in the received VLAN tagged packet will be kept as it is and is not stripped in
whole forwarding operation.
Disable - The VLAN tag data in the received VLAN tagged packet is stripped (removed).
Drop Untag Per Port Setting
Enable - All untagged packets and priority-tagged packets are dropped. A priority-tagged packet is
treated as an untagged packet in this switch. Only VLAN-tagged packets are admitted.
Disable - Disable untagged packet filtering
Drop Tag Per Port Setting
Enable - All VLAN-tagged packets are dropped. A priority-tagged packet is treated as an untagged
packet in this switch. Only untagged packets are admitted.
Disable - Disable VLAN-tagged packet filtering
Ingress Default Tag Per Port Setting
Each port can be configured with one Ingress Default Tag. This ingress port default tag is used when ingress
port is in Tag-ignore mode or for the received untagged packets in Tag-aware mode. The Ingress Default Tag
includes PVID, CFI and User Priority configuration.
When Ingress port default tag is used, it is copied as packet associated Packet Tag Information for VLAN
classification. The PVID is used as index to one VLAN group in VLAN group table.
Packet Tag Information
Under VLAN process, every packet is associated with one Packet Tag information in packet forwarding
operation. The tag information includes VID, CFI and User Priority data and is used for two purposes:

The VID in tag is used as index for VLAN classification.

The tag is used for egress tag insertion if egress tagging is enabled.
The following table lists how the Packet Tag information is generated:
Tag Aware setting
Tag-ignore
Tag-ignore
Tag-ignore
Tag-aware
Tag-aware
Tag-aware
Received Packet Type
Untagged packet
Priority-tagged packet
VLAN-tagged packet
Untagged packet
Priority-tagged packet
VLAN-tagged packet
Packet Tag information source
Ingress Port Default Tag
Ingress Port Default Tag
Ingress Port Default Tag
Ingress Port Default Tag
Ingress Port Default Tag
Received packet VLAN Tag
-64-