DGS-3200 Series Layer 2 Gigabit Ethernet Managed Switch
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GVRP Settings
In the L2 Features folder, click GVRP Settings. The GVRP Settings window, shown below, allows you to determine whether
the Switch will share its VLAN configuration information with other GARP VLAN Registration Protocol (GVRP) enabled
switches. In addition, Ingress Checking can be used to limit traffic by filtering incoming packets whose PVID does not match the
PVID of the port. Results can be seen in the table under the configuration settings, as seen below.
Figure 7- 12. GVRP Settings window
Click Apply to implement changes made. See table below for description of parameters.
The following fields can be set:
Parameter Description
From Port
This drop-down menu allows the selection of the beginning port for a range of ports that will be
included in the Port-based VLAN.
To Port
This drop-down menu allows the selection of the ending port for a range of ports that will be
included in the Port-based VLAN.
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 enable the port to compare the VID tag of an incoming
packet with the PVID number assigned to the port. 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.
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