Avaya v4.1 Manual de usuario Pagina 114

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114 Creating and managing VLANs
209322-A
15 Click Insert.
Accepting tagged and untagged frames
In the Business Policy Switch 2000, you configure whether or not tagged frames
are sent or received on the port level. Refer to VLAN tab for a single port on
page 80 for VLAN tab field descriptions. Tagging is set as true or false for the port
and applied to all VLANs on that port. You can select whether or not to discard:
Tagged frames received on a port where tagging is disabled
Untagged frames received on a port where tagging is enabled
The default is not to discard the frames. You can also designate the port-based
VLAN to which these frames are assigned by setting the tagged portsdefault
VID (the default is 1).
A Business Policy Switch 2000 switch port with tagging enabled is a port from
which all frames sent are tagged. A tagged port can be configured to discard
untagged frames or to associate them with a VLAN set by the PVID. In the latter
case, when an untagged frame is received on a tagged port, it is sent to the
user-specified PVID.
A port with tagging disabled is a port that does not send tagged frames. If a tagged
frame is forwarded out a port with tagging set to false, the switch removes the tag
from the frame before sending it outthe port. When a port with tagging set to false
receives a frame, it can be configured to discard tagged frames or to associate
them with the VLAN specified in the tag.
Note: In a source MAC-based VLAN, a potential member becomes an
active member of the VLAN when a frame with the specified source
MAC address is received. Source MAC-based VLANs are not supported
in a mixed stack environment.
Note: To optimize performance, on untagged ports in configurations
where you do not expect to see tagged frames, set DiscardTaggedFrames
to true. However, on untagged ports for interconnecting switches, it is
probably better to set DiscardTaggedFrames to false. Then, if you
convert an interswitch port from an untagged port to a tagged port,
connectivity is not lost.
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