D-Link DGS-3024, Руководство пользователя

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DGS-3024 Gigabit Ethernet Switch Manual
802.1Q Port Settings
In the Configuration menu, open the VLANs folder
and click 802.1Q Port Settings .
This 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- 38. GVRP Settings window
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 VLAN that you
are creating using the
GVRP Settings window.
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.
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 means both tagged and untagged frames will be accepted. Admit_All is enabled by
default.
PVID This 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 a packet is received by the port, 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.
Click Apply to implement changes made.
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