RE: port-security mac addresses

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/relea
se/12.1_13_ea1/configuration/guide/swtrafc.html

Secure MAC Addresses

A secure port can have from 1 to 128 associated secure addresses. This
is also the total number of available secure addresses on the switch.

You can configure these types of secure MAC addresses:

*Static secure MAC addresses-These are manually configured by using the
switchport port-security mac-address mac-address interface configuration
command, stored in the address table, and added to the switch running
configuration.

*Dynamic secure MAC addresses-These are dynamically learned, stored only
in the address table, and removed when the switch restarts.

*Sticky secure MAC addresses-These can be dynamically learned or
manually configured, stored in the address table, and added to the
running configuration. If these addresses are saved in the configuration
file, the interface does not need to dynamically relearn them when the
switch restarts. Although sticky secure addresses can be manually
configured, we do not recommend it.

You can configure an interface to convert the dynamic MAC addresses to
sticky secure MAC addresses and to add them to the running configuration
by enabling sticky learning. To enable sticky learning, enter the
switchport port-security mac-address sticky interface configuration
command. When you enter this command, the interface converts all the
dynamic secure MAC addresses, including those that were dynamically
learned before sticky learning was enabled, to sticky secure MAC
addresses.

The sticky secure MAC addresses do not automatically become part of the
configuration file, which is the startup configuration used each time
the switch restarts. If you save the sticky secure MAC addresses in the
configuration file, when the switch restarts, the interface does not
need to relearn these addresses. If you do not save the configuration,
they are lost.

If sticky learning is disabled, the sticky secure MAC addresses are
converted to dynamic secure addresses and are removed from the running
configuration.

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Lefe Meed
Sent: Wednesday, February 02, 2011 8:32 AM
To: Cisco certification
Subject: port-security mac addresses

dear all,

what is the difference between following commands ... (or purpose having
them)

....
switchport port-security mac-address 0000.0000.0001
switchport port-security mac-address sticky 0000.0000.0002
....

Thanks

-- 
/Lefe Meedorf/
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