Go CCIE Go!! - A Cisco Certified Internetwork Expert

Just a quick add to the response below.
If you configure ’switchport port-sec max 5′, Five macs will be dynamically learned. If you reboot, they will be lost. However, if you add the ’sticky’ command, they will stay after reboot.
Good Luck on the 21st!
Cindy
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Fang Gao Sent: Monday, January 28, 2008 9:41 PM To: Darren Johnson Cc: ccielab@groupstudy.com Subject: Re: Port-security - quick one
Hi, Darren,
A static mac entry is saved in running-configure, as well as startup-config if you copy runing to startup-config. It will not be lost after reboot.
I did the following at cat 3560.
interface FastEthernet0/20
switchport mode access
switchport port-security
switchport port-security mac-address 0050.04fd.9f73
After reboot, the above configuration is still in Fa0/20.
You can try it on your lab. It is simple.
HTH
Fang On Jan 28, 2008 5:22 AM, Darren Johnson wrote:
> Hey all. I’m stuggling to get me head around this. With port-security, > if I configure a static mac entry (switchport port-security > mac-address > xxxx.xxxx.xxxx) then it is added to the running-config only - doesn’t > survive a reboot. With ’sticky’ port-security, the dynamically learned > MAC is added to the running config. However, this too will not survive > a reboot. > Therefore, whats the difference?!? > > With BOTH methods, you STILL NEED TO SAVE the RUNNING-CONFIG - or they > are lost (of course the sticky will get re-learned). The only > difference I can see between the two, is that: > Sticky automatically adds the MAC address to running-config Static > configuration requires manual entry of the MAC address to > running-config > > Any thoughts/comments? > > Dazzler > > P.S. My lab is 21st Feb Brussells, anyone else out there that day? > > > > ___________________________________________________________ > Inbox full of spam? Get leading spam protection and 1GB storage with > All New Yahoo! Mail. http://uk.docs.yahoo.com/nowyoucan.html > > ______________________________________________________________________ > _ Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html