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Configuration | VLANs
Items
Ports in Hybrid mode allow for changing the port type, that is, whether a frame's VLAN
tag is used to classify the frame on ingress to a particular VLAN, and if so, which TPID it
reacts on. Likewise, on egress, the Port Type determines the TPID of the tag, if a tag is
required.
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Port Type
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Hybrid ports allow for changing ingress filtering. Access and Trunk ports always have
ingress filtering enabled.
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Ingress
Filtering
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Hybrid ports allow for changing the type of frames that are accepted on ingress.
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Ingress
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Acceptance
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Ports in Trunk and Hybrid mode may control the tagging of frames on egress.
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Egress Tagging
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This option is only available for ports in Hybrid mode.
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. By default,
Allowed VLANs
a Trunk or Hybrid port becomes a member of all VLANs, and is therefore set to 1-4095.
The field may be left empty, which means that the port does not become member of any
VLANs.
146 - Configuration Pages
Configuration | VLANs (Continued)
Unaware: On ingress, all frames, whether carrying a VLAN tag or not, get classified
to the Port VLAN, and possible tags are not removed on egress.
C-Port: On ingress, frames with a VLAN tag with TPID = 0x8100 get classified to the
VLAN ID embedded in the tag. If a frame is untagged or priority tagged, the frame
gets classified to the Port VLAN. If frames must be tagged on egress, they are tagged
with a C-tag.
S-Port: On ingress, frames with a VLAN tag with TPID = 0x8100 or 0x88A8 get
classified to the VLAN ID embedded in the tag. If a frame is untagged or priority
tagged, the frame gets classified to the Port VLAN. If frames must be tagged on
egress, they are tagged with an S-tag.
S-Custom-Port: On ingress, frames with a VLAN tag with a TPID = 0x8100 or equal
to the Ethertype configured for Custom-S ports get classified to the VLAN ID
embedded in the tag. If a frame is untagged or priority tagged, the frame gets
classified to the Port VLAN. If frames must be tagged on egress, they are tagged with
the custom S-tag.
If ingress filtering is enabled (check box is checked), frames classified to a VLAN
that the port is not a member of get discarded.
If ingress filtering is disabled, frames classified to a VLAN that the port is not a
member of are accepted and forwarded to the switch engine. However, the port never
transmits frames classified to VLANs that it is not a member of.
Tagged and Untagged - Both tagged and untagged frames are accepted.
Tagged Only - Only tagged frames are accepted on ingress. Untagged frames are
discarded.
Untagged Only - Only untagged frames are accepted on ingress. Tagged frames are
discarded.
Untag Port VLAN - Frames classified to the Port VLAN are transmitted untagged.
Other frames are transmitted with the relevant tag.
Tag All - All frames, whether classified to the Port VLAN or not, are transmitted with
a tag.
Untag All - All frames, whether classified to the Port VLAN or not, are transmitted
without a tag.
RocketLinx MP1204-XT User Guide: 2000644 Rev. A
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