Planet Networking & Communication IGS-6325 Series User Manual page 143


Ingress Filtering
 Ingress Acceptance
Egress Tagging

Allowed VLANs

Forbidden VLANs
gets classified to the Port VLAN. If frames must be tagged on egress, they
will be tagged with the custom S-tag.
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.
Hybrid ports allow for changing the type of frames that are accepted on ingress.
■
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.
This option is only available for ports in Hybrid mode. 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.
Ports in Trunk and Hybrid mode may control which VLANs they are allowed to
become members of. 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.
A port may be configured to never be 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
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User's Manual of IGS-6325 series