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3.5 802.1Q Control Function
802.1Q Control function allows to perform 802.1Q VLAN related operation to the packets passing
through the media converter according packet contents as follows:
[Ingress Drop] setting
The setting is the first filtering mechanism to filter all incoming untagged packets or to filter all incoming
VLAN-tagged packets. The options are:
Disable - Disable port ingress drop function
Untag Only - All incoming untagged packets and priority-tagged packets are dropped.
Only VLAN-tagged packets are admitted.
Tag Only - All incoming VLAN-tagged packets are dropped.
Only untagged packets and priority-tagged packets are admitted.
[Ingress Keep Tag], [Egress Insert Tag] settings
The settings are used together for packet egress tagging or untagging as table listed below:
Ingress Keep Tag Egress Insert Tag Packet Modification
Enable Disable All packets are with no modification.
Disable Disable All packets are untagged in egress.
Disable Enable All packets are tagged in egress.
Enable Enable Settings not recommended (possible double-tagging)
[Ingress Keep Tag] options:
Enable - The VLAN tag in the received VLAN-tagged packet will be kept as it is and is
not stripped in whole conversion operation.
Disable - The VLAN tag data in the received VLAN-tagged packet is stripped (removed).
[Egress Insert Tag] options:
Enable - Insert a tag into the packet in egress. The tag inserted is based on the rule below:
Incoming Packet Type Tag inserted
Untagged Ingress port Default Tag
Priority-tagged Ingress port Default Tag
VLAN-tagged Received packet own tag
Disable - No tagging is performed.
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