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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
2-16.2 Port Isolation
Port Isolation provides for an apparatus and method to isolate ports on layer 2 switches on the same
VLAN to restrict traffic flow. The apparatus comprises a switch with multiple ports, each port configured
as a protected port or a non-protected port. An address table in memory stores an address table having a
destination address and port number pair. A forwarding map generator generates a forwarding map which
is responsive to a destination address of a data packet.
The method for isolating ports on a layer 2 switch comprises configuring each of the ports on the layer 2
switch as a protected port or a non-protected port. A destination address on a data packet is matched
with a physical address on said layer 2 switch and a forwarding map is generated for the data packet
based upon the destination address on the data packet. The data packet is then sent to the plurality of
ports pursuant to the forwarding map generated based upon whether the ingress port was configured as
a protected or non-protected port.
This page is used for enabling or disabling port isolation on ports in a Private VLAN. A port member of a
VLAN can be isolated to other isolated ports on the same VLAN and Private VLAN.
Web Interface
To configure Port Isolation in the web UI:
1. Click Configuration, Private VLANs, Port Isolation.
2. Select which ports you want to enable Port Isolation.
3. Click Apply.
Figure 2-16.1: Port Isolation Configuration page
Parameter descriptions:
Port Members
: A check box is provided for each port of a private VLAN. When checked, port isolation is
enabled on that port. When unchecked, port isolation is disabled on that port. By default, port isolation is
disabled (unchecked) on all ports.
Buttons:
Auto-refresh
: Check this box to refresh the page automatically every 3 seconds.
Refresh
: Click to refresh the page immediately.
Apply
– Click to save changes.
Reset -
Click to undo any changes made locally and revert to previously saved values.