12.3(4)T This command was introduced. ip ssh version [1 | 2] Cisco IOS Security Command Reference: Commands D to L - ip source-track through ivrf [Support] - Cisco this command introduced in 12.3(4)sorry. 

Cisco 2600 Series - Cisco IOS Release 12.2(2)XA - Cisco IP/FW/IDS Plus IPsec 3DES c2600-ik9o3s-mz this image is 3DES version, I will check why command version not appear 

Secure Shell Version 2 Support (cisco.com) Before configuring SSH, ensure that the required image is loaded on your device. The SSH server requires you to have a k9 (Triple Data Encryption Standard [3DES]) software image depending on your release.

LoL... I know it you will mention the use of 300 instead of 1200I know it OK I will provide cisco doc. about the soft max multiply value for each SW. have a nice day friend  @Joseph W. Doherty 

can I see show version