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DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
85
The following fields can be set:
Parameter Description
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.
GVRP
The Group VLAN Registration Protocol (GVRP) enables the port to dynamically become a
member of a VLAN. GVRP is Disabled 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.
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.
GVRP Global Settings
The GVRP allows interoperability with other switches, so the values of the GVRP timers can be configured. This table
is used to set the GVRP Global Settings.
To view this window, click L2 Features > GVRP Global Settings as shown below:
Figure 3 - 20 GVRP Timer Settings window
The following fields can be set:
Parameter Description
Join Time
(100-100000)
The time in milliseconds that specifies the amount of time between the Switch receiving the
information about becoming a member of the group and actually joining the group. The default
is 200.
Leave Time
(100-100000)
The time in milliseconds that specifies the maximum amount of time between the Switch
receiving a leave group message from a host, and the Switch issuing a group membership
query. The default is 600. The Leave Time must be greater than 2 join times.