Question : isakmp command not found

I need someone to explain to me why i don't see the ISAKMP options on my routers and provide suggestions.

When i try to enable isakmp, I notice that the "isakmp" is not pesent.
when i do a crypto ?
i see only
I do not see "ISAKMP"

Cisco 2811 IOS "c2800nm-ipbasek9-mz.124-19.bin"

Answer : isakmp command not found


Ipbase feature set does not contain isakmp, you need to upgrade (buy) an ios with more features. Use cisco feature navigator to browse features.

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