ZyXEL Communications GS2210 series Handbook page 183

6 Go to Advance Application > IP Source Guard > IPv4 Source
Guard Setup > DHCP Snooping > Configure > VLAN. Input the
Start VID and End VID. Make sure that the PVID of the access
ports are included in this range. Click Apply.
7 After inputting the VID range, a list of VID should appear
below. Select Yes for the access ports' VLANs. Click Apply.
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