D-Link xStack DGS-3426 User Manual - page 100
xStack DGS-3400 Series Fast Ethernet Switch
The following fields can be set:
Parameter
Description
From/To
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.
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
Disabled 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 Admit_All, which mean both tagged and untagged
frames will be accepted. Admit_All is enabled by default.
Click Apply to implement changes made.
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