simple port-security

[Andrey Poluda]

Hi, everybody! I`m gonna use port security on my switches. What happens with interfaces that are not currently used, but I will add to them port security and someone new connected to him? How best to configure port security on trunk port?

[Karsten Iwen]

First, you should ask yourself what youmwant to achieve. Then it's possible to give advice on what and to how to configure.

Back to your questions:
If someon connects to a newly configured port, port-security will learn the connected MAC-address or addresses and protect your network from additional MACs. For trunk-ports it is also possible to enable port-security, but not very often useful in an enterprise-environment. Most times it is better to configure security on the switch (if it is one) that is connected to the trunk-port.


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[Anas Naqvi]

Hi Andrey,

As Karsten said, it depends what’s your objective and what is to be achieved. For rest of the questions following link might help,

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25sg/configuration/guide/port_sec.pdf