SSH Public key authentication "Cannt parse private key Unsupported key

[Palazsto]

Hello Guys,

I'm trying to set up a public key authentication on some cisco devices.The devices are configured(fingerprint match) 

and also the file with private key is attached to the prifile in CLI Analyzer .

Key pair is generated via Putty key generator (RSA 2048), but when I try to connect I receive an error from the CLI Analyzer :

"Cannt parse private key : Unsupported key format" 

The private key is .ppk file. 

What is the key format that i need to make that working ?

[balaji.bandi]

Cisco Look for PEM format. and with out encrypted with RSA key.

here is help some steps :

https://community.cisco.com/t5/security-documents/ssh-using-public-key-authentication-to-ios-and-big-outputs/ta-p/3122001

https://www.cisco.com/c/en/us/support/docs/security-vpn/secure-shell-ssh/4145-ssh.html

https://networklessons.com/uncategorized/ssh-public-key-authentication-cisco-ios