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3.3 VLAN Function
The switch supports port-based VLAN, 802.1Q Tag VLAN and eight VLAN groups.
3.3.1 VLAN Operation
The following figure illustrates the basic VLAN operation flow beginning from a packet received on an ingress
port until it is transmitted from an egress port.
The following sections describe the VLAN processes and Advanced VLAN mode settings provided by the
switch. A global setting means the setting is applied to all ports of the switch. A per port setting means each
port can be configured for the setting respectively.
3.3.2 Ingress Rules
When a packet is received on an ingress port, the ingress rules are applied for packet filtering and packet tag
removal. The related Ingress port settings are:
3.3.2.1 802.1Q Tag Aware Per port setting
Tag-aware - 802.1Q Tag Aware mode is used. The switch examines the tag content of every received packet.
For a VLAN tagged packet, the packet VLAN tag data is retrieved as packet tag information for
VLAN classification and egress tagging operation. For untagged packet and priority-tagged packet,
port-based mode is used.
Tag-ignore - Port-based mode is used. The switch ignores the tag content of every received packet. Ingress Port
Default Tag is always used as packet tag information for VLAN classification.
3.3.2.2 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).
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