Planet GSD-802S User Manual page 40

That is, although the VLAN 2 members: Port-1 to Port-3 and VLAN 3 members: Port-4 to Port-6 also belong to VLAN 1.
But with different PVID settings, packets form VLAN 2 or VLAN 3 is not able to access to the other VLAN.
4.6.3.3 VLAN Trunking between two 802.1Q aware switch
The most cases are used for "Uplink" to other switches. VLANs are separated at different switches, but they need to
access with other switches within the same VLAN group. The screen in
About the VLAN ports connect to the hosts, please refer to 4.6.3.1 and 4.6.3.2 examples. The following steps will focus on
the VLAN Trunk port configuration.
1. Specify Port-8 to be the 802.1Q VLAN Trunk port, and the Trunking port must be a Tagged port while egress. The
Port-8 configuration as the following screen in
Figure 4-6-15 802.1Q Trunking With Other VLAN Aware Device
Figure
Figure 4-6-16 The Configuration of VLAN Trunk Port
User's Manual of GSD-802S / GSD-802PS
Figure 4-6-15
4-6-16.
appears.