Planet GS-5220 Series, User Manual, Page: 200 / 568

User’s Manual of GS-5220 LCD Series
200
Egress Tagging 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.
• Allowed VLANs 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.
• Forbidden 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 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.