Many Cisco IOS devices support SSH2 from Version 12 on.
Netscreen devices with V5+ of the IOS also support SSH2.
To enable CatTools to connect to a Netscreen device there is a variant of the SSH2 protocol called SSH2-nopty that may need to be used.
This is in relation to the pseudo terminal that is used in *nix when using SSH connections to a command processor, but may not be required by network devices.