Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 86
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 egress, if frames must be tagged, they will be tagged with an S-tag. On ingress, frames with a
VLAN tag with TPID = 0x88A8 or 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. 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.
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. 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.
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: 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. This
option is only available for ports in Hybrid mode.
Allowed VLANs: 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, a Trunk or Hybrid port will become member of all VLANs
and is therefore set to 1-4095. The field may be left empty, which means that the port will not become member of
any VLANs.
Forbidden VLANs: A port may be configured to never become member of one or more VLANs. This is
particularly useful when dynamic VLAN protocols like MVRP and GVRP must be prevented from dynamically
adding ports to VLANs. The trick is to mark such VLANs as forbidden on the port in question. The syntax is
identical to the syntax used in the Enabled VLANs field. By default, the field is left blank, which means that the
port may become a member of all possible VLANs.
Buttons
Apply: Click to save changes.
Reset: Click to undo any changes made locally and revert to previously saved values.
To Next Page
Loading...
Need help?
General
