User’s Manual of GSD-800S / GSD-802S / GSD-802PS
Figure 4-22
Add VLAN Trunk port to each VLAN
3. Repeat Step 1 and 2, setup the VLAN Trunk port at the partner switch.
4. To add more VLANs to join the VLAN trunk, repeat Step 2 to assign the Trunk port to the VLANs.