Thanks for the reply.Actally i have 200 PC's and i want that only that's much PC's will be able to access my network.Can i have a central database of all mac-address , so that first switch will refer that database and then authenticate .
try VMPS ,it is possible to have the switch dynamically choose a VLAN based on the MAC address of the device connected to a port.if the PC MAC address was not there in the databae it will not assine to any of VLAN ( you minght need to shutdown the native VLAN - 1 )
You may also consider a RADIUS solution - hardware or software. As mentioned above, it's a good idea to make sure you shutdown unused ports. I even go so far as unpluging cables from the switches in all my closets.
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