The Cisco ISR 1900, 2900 and 3900 Series adopt the Universal IOS image model enabling customers to future proof their networks.
Universal IOS Packaging Overview:
As we all know that for ISR-G2 we have to enable licenses to use the feature instead of using IOS images. The Universal IOS image is loaded by Cisco manufacturing on all shipped routers. IOS Universal Image contains all IOS features. Feature sets in the universal image are unlocked using licensing keys i.e. the level of IOS functionality available is determined by the license applied to the device. A new license only needs to be applied to upgrade IOS functionality on the router .Moving from one IOS universal image version to another does not require a new licensing key. Reboot of router is also licensing transparent.
IPBase, DATA, UC (Unified Communications) and SEC (Security) technology packages are enabled in the universal image via Cisco Software Activation licensing keys. Each licensing Key is unique to a particular device and is obtained from Cisco by providing the product ID and serial number of the router and a Product Activation Key (PAK), which is provided by Cisco at time of Software purchase.
And you can also get this information by command: “show license udi”
IOS Packaging Model for 1900, 2900 and 3900 ISRs
Common Issues :
Which license to install which gives the entire feature which were there on ISR-G1?
The table below outlines the suggested migration from reformation packaging in ISRs to Simplified packaging on Next generation ISRs. The transition matrix outlines transition with feature parity in mind across transitions.
Universal image-----IP Base
Advanced IP Services----Security + Data + UC(for feature parity and Enterprise Features)
Enterprise Services----Data + UC
SP Services----Data + UC (for feature parity and Enterprise Features)
Temporary licenses are used for evaluating new capabilities or in emergency situations. A temporary license allows a feature set to be used for 60 days of actual usage. When the 60-day period expires, the device will continue to operate normally until reloaded. After the reload, the device will default to the original functionality before the temporary license was enabled.
To enable evaluation license on the device by command:
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