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Port Type :
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.
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 will be 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 will be 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 will be tagged with the custom S-tag.
Ingress Filtering :
Hybrid ports allow for changing ingress filtering. Access and Trunk ports always have ingress
filtering enabled.
If ingress filtering is enabled (checkbox 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 will never transmit frames
classified to VLANs that it is not a member of.
VLAN Trunking :
Trunk and Hybrid ports allow for enabling VLAN trunking.
When VLAN trunking is enabled, frames classified to unknown VLANs are accepted on the
port whether ingress filtering is enabled or not.
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