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Notice:
If the S-port is configured to accept
Tagged and Untagged
frames (see Ingress Acceptance below), frames with a
C-tag are treated like frames with an S-tag.
If the S-port is configured to accept
Untagged Only
frames, S-tagged frames will be discarded (except for priority
S-tagged frames). C-tagged frames are initially considered untagged and will therefore not be discarded. Later
on in the ingress classification process, they will get classified to the VLAN embedded in the tag instead of the
port VLAN ID.
S-Custom-Port:
On egress, if frames must be tagged, they will be tagged with the custom S-tag.
On ingress, frames with a VLAN tag with a TPID equal to the Ethertype configured for Custom-S ports get
classified to the VLAN ID embedded in the tag.
Priority-tagged frames are classified to the Port VLAN.
If the port is configured to accept
Tagged Only
frames (see Ingress Acceptance below), frames without this TPID
are dropped.
Notice:
If the custom S-port is configured to accept
Tagged and Untagged
frames (see Ingress Acceptance below),
frames with a C-tag are treated like frames with a custom S-tag.
If the Custom S-port is configured to accept
Untagged Only
frames, custom S-tagged frames will be discarded
(except for priority custom S-tagged frames). C-tagged frames are initially considered untagged and will
therefore not be discarded. Later on in the ingress classification process, they will get classified to the VLAN
embedded in the tag instead of the port VLAN ID.
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.
Ingress Acceptance
Hybrid ports allow for changing the type of frames that are accepted on ingress.
Tagged and Untagged
Both tagged and untagged frames are accepted. See Port Type for a description of when a frame is considered
tagged.
Tagged Only
Only frames tagged with the corresponding Port Type tag are accepted on ingress.
Untagged Only
Only untagged frames are accepted on ingress. See Port Type for a description of when a frame is considered
untagged.
Egress Tagging
Ports in Trunk and Hybrid mode may control the tagging of frames on egress.
Untag Port VLAN
Frames classified to the Port VLAN are transmitted untagged. Other frames are transmitted with the relevant tag.
Tag All
