IP-COM F1226P, Руководство пользователя

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As seen on the screen below, available PVIDs for port 1 are 1 and 2.
2. How port handles tag:
Ignore: Packets are forwarded as they are.
For example, if port 3 is configured to Ignore, all tagged packets received on port 3 will be forwarded with tags and
all untagged packets received on port 3 will be forwarded without tags
Add Tag: Add tag to egress packets.
For example, if port 3 is configured to Add Tag, then all untagged packets received on port 3 will be tagged before
they are forwarded
Remove Tag (Untag): Remove tags from egress packets.
For example, if port 3 is configured to Remove Tag, then all tagged packets received on port 3 will be removed
(untagged) before they are forwarded
IMPORTANT:

Up to 32 802.1Q VLANs can be configured.

An 802.1Q VLAN can be empty (include no ports).

All ports always belong to VLAN1. You can implement VLAN isolation using the QVLAN PVID.

Operating in 802.1Q VLAN mode, MAC address learning is shared and a MAC address can only belong to
one VLAN.

802.1Q VLAN can implement inter-switch isolation and provide segmentation services across different
switches.
PVID is not affected by VLAN ID. For example, you can assign port 1 to VLAN 1, VLAN2 and VLAN3 but