D-Link DGS-3120-24TC Product Manual - Page 75

xStack® DGS-3120 Series Managed Switch Web UI Reference Guide packets. If the port is specified to accept only tagged frames - as tagging, and an untagged packet is forwarded to the port for transmission, the port will add an 802.1Q tag using the PVID to write the VID in the tag. When the packet arrives at its destination, the receiving device will use the PVID to make VLAN forwarding decisions. If the port receives a packet, and Ingress filtering is Enabled, the port will compare the VID of the incoming packet to its PVID. If the two are unequal, the port will drop the packet. If the two are equal, the port will receive the packet. GVRP The GARP VLAN Registration Protocol (GVRP) enables the port to dynamically become a member of a VLAN. GVRP is Disabled by default. Ingress Checking This drop-down menu allows the user to enable the port to compare the VID tag of an incoming packet with the port VLAN membership. If enable ingress checking and the reception port is not the member port of the frame's VLAN, the frame shall be discarded. Acceptable Frame Type This field denotes the type of frame that will be accepted by the port. The user may choose between Tagged Only, which means only VLAN tagged frames will be accepted, and All, which mean both tagged and untagged frames will be accepted. All is enabled by default. Click the Apply button to accept the changes made. MAC-based VLAN Settings Users can create new MAC-based VLAN entries, search and delete existing entries. When a static MAC-based VLAN entry is created for a user, the traffic from this user will be able to be serviced under the specified VLAN regardless of the authentication function operating on this port. To view the following window, click L2 Features > VLAN > MAC-based VLAN Settings, as show below: Figure 4-13 MAC-based VLAN Settings The fields that can be configured are described below: Parameter Description MAC Address Specify the MAC address to be re-authenticated by entering it into the MAC Address field. VID Select this option and enter the VLAN ID. VLAN Name Select this option and enter the VLAN name of a previously configured VLAN. Click the Find button to locate a specific entry based on the information entered. Click the Add button to add a new entry based on the information entered. Click the View All button to display all the existing entries. Click the Delete All button to remove all the entries listed. Click the Delete button to remove the specific entry. Private VLAN Settings A private VLAN is comprised of a primary VLAN, up to one isolated VLAN, and a number of community VLANs. A private VLAN ID is presented by the VLAN ID of the primary VLAN. The command used to associate or de- 67