KTI Networks KS-2260 - Manual (Page 130)

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Port VID Settings
Click [Port VID] to set per port VID and Ingress filtering rules. Multiple
port selection at the same time for same settings is allowed.
Port VID Settings:
Port VID (PVID) : the port VLAN ID that will be assigned to untagged
traffic on a given port. The range is 1~255, default PVID is 1.
Ingress Filtering Rule 1 : Drop or forward input VLAN tagged frames
whose VID does not match PVID associated to the input port. This rule is
applied only when input port is not the member port of the associated
VLAN group.
Ingress Filtering Rule 2 : Drop Untagged Frame.