15.x Universal IOS and Licence

Installing a Permanent License Using Cisco IOS CLI
This is assuming that the router has been ordered with the license pre-installed
enable
license install flash0:uck9-C3900-SPE150_K9-FHH12250057.xml
reload

Activating CME-SRST Feature License
The ISR G2 comes with a 60-day evaluation license. After 60 days, the license changes to “right to use”. The customer is required to pay for the CME-SRST feature license which is valid for 12 years.

Prerequisites
•UCK9 license
•ISR G2 already accepts UC CLIs
•CME-SRST feature must be configured

show license detail cme-srst
configure terminal
license accept end user agreement
exit
show license detail cme-srst
write mem

Activating an Evaluation License

Note Starting with Cisco IOS Releases 15.0(1)M6, 15.1(1)T4, 15.1(2)T4, 15.1(3)T2, and 15.1(4)M, Evaluation licenses are replaced with Evaluation Right To Use licenses. Evaluation Right to Use licenses automatically become Right to Use licenses after the initial evaluation period. Follow the steps detailed in this section to activate an Evaluation Right to Use license.

To activate an evaluation license in the Cisco 3900 series, 2900 series, and 1900 series routers, perform the steps detailed in this section. Evaluation licenses are activated using the license boot module module-name technology-package package-name command.

enable
configure terminal
license boot module 'module-name' technology-package 'package-name'
exit
reload

Ref: http://www.cisco.com/en/US/docs/routers/access/sw_activation/SA_on_ISR.html#wp1155517

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About Alexis Katsavras

Working as Freelance Cisco Unified Communications Consultant in the UK. www.NetPacket.co.uk