--> When you purchase a Cisco router, it comes with an IOS image that has all feature sets included in it but you need to activate it with the help of license.
--> Cisco IOS 15 comes with 4 Feature sets and these 4 Features set combined into one single IOS image called as the universal image.
--> The feature sets are now called as technology packages.
1) IP BASE: (ipbaseK9)
--> By default, all the new ISR routers come with IP BASE License.
--> Its entry-level License for Cisco IOS functionality.
2) DATA (dataK9)
--> support MPLS.ATM. Multiprotocol support
3) Unified Communications (ucK9)
--> support VOIP & IP Telephony
4) Security (securityK9)
--> support Cisco IOS Firewall,IPS,IPsec,3DES,VPN
--> Every router that supports the new licensing model contains a unique device identifier (UDI).
--> This unique device identifier (UDI) number is a combination of the product ID (PID) and a serial number (SN).
--> We can check this unique device identifier (UDI) number on the router, with the help of the following command,
Router # show license udi
--> The UDI is also printed on a label that is located on the back of every switch or router.
--> To check which license is being installed on the router, with the help of the following command,
Router # show license
--> In order to install the license on the router or switch, we need PAK (Product Authorization Key).
--> This PAK includes a unique number which Cisco uses to check what license you have purchased.
--> Then this PAK and UDI of the router or Switch creates a license key.
--> This can be done with the help of Cisco License Registration Portal where you need to enter the PAK and the UDI.
--> Cisco will check if your PAK and UDI are valid and activated or not before. If everything is OK, then you get the license key.
--> Once you get the license key, we need to copy this license key on Flash with the help of TFTP Server or FTP Server.
--> Once License Key in the flash of the router or switch then we can install the license using the following command,
Router# license install flash0:uck9-1900-SPE15dj0_K9-FHH1221357.xml
Router# reload
--> This license can be permanent( Needs License from cisco to run it forever) or evaluation (available with all functionality for the trial period would be 60 days).
Md.Kareemoddin
CCIE # 54759
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