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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. This is useful in scenarios where a cloud of intermediary switches must
bridge VLANs that haven't been created. By configuring the ports that connect the cloud of
switches as trunking ports, they can seamlessly carry those VLANs from one end to the other.
Ingress Tagging
Ports in Trunk and Hybrid mode may control the tagging of frames 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.`
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 Existing VLANs field. By default, a port may
become member of all possible VLANs, and is therefore set to1-4095. The field may be left
empty, which means that the port will not be member of any of the existing VLANs, but if
it is configured fo VLAN Trunking. It will still be able to carry all unknown 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 Existing VLANs field. By
default, the field is left blank, which means that the port may become a member of all
possible VLANs.
Private VLANs
In a private VLAN, communication between ports in that private VLAN is not permitted. The VLAN membership configuration
for the selected stack switch unit switch can be monitored and modified here. Up to 4096 VLANs are supported. This
page allows for adding and deleting VLANs as well as adding and deleting port members of each VLAN.
To configure the Private VLAN membership in the web interface:
Click Configuration / Private VLANs / Membership
Specify management VLAN ID. From 0 to 4094.
Click Apply and click the Save icon in the upper right corner to save the settings or click Reset to cancel. The
Form will return to the previously saved settings.
Private VLAN Configuration Parameters:
Items
Description
Delete
To delete a private VLAN entry, check this box. The entry will be deleted during the next save.
PVLAN ID
Indicates the ID of the private VLAN
Summary of Contents for S81
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