D-Link DES-3528 Product Manual - Page 77

xStack® DES-3528/DES-3552 Series Layer 2 Stackable Fast Ethernet Managed Switch Web UI Reference Guide Figure 4-12 GVRP Port Settings window The fields that can be configured are described below: Parameter Description Unit Select the unit to configure. From Port / To Port Select the starting and ending ports to use. PVID This field is used to manually assign a PVID to a VLAN. The Switch's default is to assign all ports to the default VLAN with a VID of 1.The PVID is used by the port to tag outgoing, untagged packets, and to make filtering decisions about incoming 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 check whether the VID tag of an incoming packet and the port is the member of this VLAN. If the two are different, the port filters (drops) the packet. Disabled disables ingress filtering. Ingress checking is Enabled by default. 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. 68