D-Link DES-3528 - xStack Switch - Stackable, User Manual, Page: 91 / 322

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DES-3528/DES-3552 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
90
GVRP Settings
The GARP VLAN Registration Protocol (GVRP) is a mechanism that dynamically maintain VLAN information on the
Switch, share the information to other GVRP-enabled switches and update switch information for other modules such
as interface.
The table allows the user to determine whether the Switch will share its VLAN configuration information with other
GVRP-enabled switches. In addition, Ingress Checking can be used to limit packet forwarding. When the received port
is not one of the packet’s VID specified VLAN, the packet will be dropped. Results can be seen in the table under the
configuration settings, as seen below.
To view this window click
L2 Features > GVRP Settings
Figure 3 - 24 GVRP Settings window
The following fields can be set:
Parameter Description
GVRP Global
Settings
Click the radio buttons to enable or disable the GVRP global settings.
From Port/To Port
These two fields allow you to specify the range of ports that will be included in the Port-based
VLAN that you are creating using the
802.1Q Port Settings
window.
PVID
The read-only field in the 802.1Q Port Table shows the current PVID assignment for each port,
which may be manually assigned to a VLAN when created in the 802.1Q Port Settings table.
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 Group VLAN Registration Protocol (GVRP) enables the port to dynamically become a
member of a VLAN. GVRP is
Disabled by default.