CTC Union GSW-3208M, Руководство пользователя

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Chapter 6. Manage / Configure the Switch
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1-2).VLAN Tag Rules
For 802.1Q VLAN, every port could be tag port or untag port.
Tag port will always send tagged packets and is used for switch-to-switch cascading. It is a VLAN trunk connection
because there could be more than one VLAN working through it. And its role is a “ Trunk ” for 802.1Q VLAN groups
operation between switches.
Untag port will always send untagged packets and is used for switch to users connection. And its role is a “ Access ”
connection for users.
You can define ports as “Trunk” or “Access” according to their connection devices and your applications.
If a port is defined as “ Hybrid ”, it is a tag port basically. But it will act as an untag port for packets working in VLAN
defined in “Untag VID”. So, it is called a hybrid port.
For example, set Port 5 as “Hybrid” and its Untag VID as 10. Port 5 will act as a tag port for all packets except packets
for VLAN 10. Port 5 will act as an untag port for packets working for VLAN 10.