Planet GS-5220 Series User Manual page 213

Setup steps
1. Add VLAN Group
Add two VLANs – VLAN 2 and VLAN 3
Type 1-3 in Allowed Access VLANs column, the 1-3 is including VLAN1 and 2 and 3.
2. Assign VLAN Member and PVID for each port :
VLAN 2 : Port-1,Port-2 and Port-3
Figure 4-6-11: VLAN Trunking Diagram
Figure 4-6-12: Add VLAN 2 and VLAN 3
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User's Manual of GS-5220 LCD Series