Optical Systems Design OSD2251EP Series Operator's Manual page 47

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P VLAN
ORT
Determines the port's VLAN ID (a.k.a. PVID). Allowed VLANs are in the range
1 through 4095, default being 1.
On ingress, frames get classified to the Port VLAN if the port is configured as
VLAN unaware, the frame is untagged, or VLAN awareness is enabled on the
port, but the frame is priority tagged (VLAN ID = 0).
On egress, frames classified to the Port VLAN do not get tagged if Egress
Tagging configuration is set to untag Port VLAN.
The Port VLAN is called an "Access VLAN" for ports in Access mode and
Native VLAN for ports in Trunk or Hybrid mode.
T VLAN (T
AGGED
Ports in Trunk and Hybrid mode may control which VLANs they are allowed to
become members of. Access ports can only be member of one VLAN, the Access
VLAN.
The field's syntax is identical to the syntax used in the Enabled VLANs field. All
VLAN frames in field(except port VLAN), are transmitted with a tag.
F VLAN (U
IXED
All VLAN frames in this field, are transmitted without a tag.
This option is only available for ports in Hybrid mode.
Buttons
: saves the new settings
PAGE 47
OSD2251EP OPERATOR MANUAL
OPTICAL SYSTEMS DESIGN
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Member of exactly one VLAN, the Port VLAN (a.k.a. Access
VLAN), which by default is 1
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Accepts untagged frames
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Discards all frames not classified to the Access VLAN
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On egress all frames are transmitted untagged
Trunk: Trunk ports can carry traffic on multiple VLANs
simultaneously, and are normally used to connect to other switches.
Trunk ports have the following characteristics:
The VLANs that a trunk port is member of may be limited by the use of
Allowed VLANs

Frames classified to a VLAN that the port is not a member of
are discarded
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By default, all frames but frames classified to the Port VLAN
(a.k.a. Native VLAN) get tagged on egress. Frames classified
to the Port VLAN do not get C-tagged on egress

Egress tagging can be changed to tag all frames, in which case
only tagged frames are accepted on ingress
Hybrid: Hybrid ports resemble trunk ports in many ways, but adds
additional port configuration features. In addition to the characteristics
described for trunk ports, hybrid ports have these abilities:

Can be configured to be VLAN tag unaware
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Ingress filtering can be controlled
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Ingress acceptance of frames and configuration of egress
tagging can be configured independently
)
AGGED
)
NTAGGED
DOC ID: 10119201