Trunking - D-Link xStack DES-3800 Series User Manual

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PVID
GVRP
Ingress Check
Acceptable Frame
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Trunking

Understanding Port Trunk Groups
Port trunk groups are used to combine a number of ports together to make a single high-bandwidth
data pipeline. DES-3800 Series supports up to 32 port trunk groups with 2 to 8 ports in each group. A
potential bit rate of 8000 Mbps can be achieved.
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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.
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.
The Group VLAN Registration Protocol (GVRP) enables the port to dynamically
become a member of a VLAN. GVRP is Disabled by default.
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.
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.
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