ZyXEL Communications ES-2024 Series, User Manual, Page: 139 / 282

Chapter 19 Port Security
ES-2024 Series User’s Guide
139
19.3 Port Security Example
The following example demonstrates the various settings and results associated with different
port security configurations. Ports 1 to 5 are configured to:
• Port 1 - Forward all packets and learn all MAC addresses.
• Port 2 - Forward all packets and learn all MAC addresses.
• Port 3 - Drop all packets from unknown MAC addresses and do not learn MAC addresses.
• Port 4 - Drop all packets from unknown MAC addresses and do not learn MAC addresses.
• Port 5 - Drop all packets from unknown MAC addresses but forward packets from up to
100 learned MAC addresses.
Limited Number
of Learned
MAC Address
Use this field to limit the number of (dynamic) MAC addresses that may be learned
on a port. For example, if you set this field to "5" on port 2, then only the devices with
these five learned MAC addresses may access port 2 at any one time. A sixth device
would have to wait until one of the five learned MAC addresses aged out. MAC
address aging out time can be set in the Switch Setup screen. The valid range is
from “0” to “8192”. “0” means that the limiting of learned addresses is disabled.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch
loses these changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when you are
done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Table 39 Advanced Application > Port Security (continued)
LABEL DESCRIPTION