Chapter 4: Web configuration
NS3552-8P-2S-V2 User Manual 119
The page includes the following fields:
Object Description
Delete Select this check box to delete a private VLAN entry. The entry will be
deleted during the next save.
Private VLAN ID Indicates the ID of this particular private VLAN.
Port Members A row of check boxes for each port is displayed for each private
VLAN ID. To include a port in a Private VLAN, select the check box.
To remove or exclude the port from the private VLAN, make sure the
box is deselected. By default, no ports are members, and all boxes
are deselected.
Adding a New Private VLAN Click Add New Private VLAN to add a new private VLAN ID. An
empty row is added to the table, and the private VLAN can be
configured as needed. The allowed range for a private VLAN ID is the
same as the switch port number range. Any values outside this range
are not accepted, and a warning message appears. Click OK to
discard the incorrect entry, or click Cancel to return to the editing and
make a correction.
The private VLAN is enabled when you click Save.
The Delete button can be used to undo the addition of new Private
VLANs.
Buttons
• Select Add new Private VLAN from the Static drop-down list.
• Select the Auto-refresh check box to refresh the page automatically. Automatic
refresh occurs every three seconds.
• Click Save to save changes.
• Click Reset to undo any changes made locally and revert to previously saved
values.
• Click Refresh to refresh the page immediately.
Port isolation
When a VLAN is configured to be a private VLAN, communication between ports within
that VLAN can be prevented. Two application examples are provided in this section:
• Customers connected to an ISP can be members of the same VLAN, but they are
not allowed to communicate with each other within that VLAN.
• Servers in a farm of web servers in a Demilitarized Zone (DMZ) are allowed to
communicate with the outside world and with database servers on the inside
segment, but are not allowed to communicate with each other.
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