IKEv2 was first supported in IOS 15.1.1T with site-to-site. As this version is not available on the older 2600 and 3600 routers, they can't be configured with IKEv2.
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Thanks karsten. Do u have the IKEv2 configuration (command line) for IOS router. Following are the phase 1 and phase 2 requirements.
Authentication method : preshared
Encryption Algorithm : AES-256
Hash : MD5
DH : Group 2
Lifetime : 1440 minutes
Mode : Main mode
Encapsulation : ESP
Encryption Algorithm : 3DES
Hash : SHA-1
PFS : No PFS
Lifetime : 3600 seconds
here is a guide with all needed configuration:
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