Gvrp Setting - D-Link xStack DGS-3400 Series User Manual

xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch

GVRP Setting

In the Administration menu, open the VLAN folder and
click GVRP Settings. The 802.1Q Port 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.
Click Apply to implement changes made. See table below for description of parameters.
The following fields can be set:
Parameter Description
Unit Select the switch in the switch stack to be modified.
From/To These two fields allows the range of ports that will be included in the Port-based VLAN created
using the 802.1Q Port Settings window, to be specified.
GVRP The GARP VLAN Registration Protocol (GVRP) enables the port to dynamically become a member
of a VLAN. GVRP is Disabled by default.
Ingress Check This field can be toggled using the space bar between Enabled and Disabled. Enabled enables 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 This field denotes the type of frame that will be accepted by the port. The user may choose
Frame Type between Tagged Only, which means only VLAN tagged frames will be accepted, and Admit_All,
which mean both tagged and untagged frames will be accepted. Admit_All is enabled by default.
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.
Figure 7- 7. GVRP Settings window
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