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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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Port Security
A given ports’ (or a range of ports') dynamic MAC address learning can be locked such that the current source MAC addresses
entered into the MAC address forwarding table can not be changed once the port lock is enabled. Using the Admin State pull-
down menu to Enabled, and clicking Apply can lock the port.
Port Security is a security feature that prevents unauthorized computers (with source MAC addresses) unknown to the Switch
prior to locking the port (or ports) from connecting to the Switch's locked ports and gaining access to the network. To view the
following window, click Security > Port Security.
Figure 11- 2. Port Security Settings window
The following parameters can be set:
Parameter Description
From/To
A consecutive group of ports may be configured starting with the selected port.
Admin State
This pull-down menu allows you to enable or disable Port Security (locked MAC address table
for the selected ports).
Max. Learning
Addr. (0-16)
The number of MAC addresses that will be in the MAC address-forwarding table for the
selected switch and group of ports.
Mode
This pull-down menu allows you to select how the MAC address table locking will be
implemented on the Switch, for the selected group of ports. The options are:
• Permanent – The locked addresses will not age out after the aging timer expires.
• DeleteOnTimeout – The locked addresses will age out after the aging timer expires.
• DeleteOnReset – The locked addresses will not age out until the Switch has been
reset.
Click Apply to implement changes made.